Raspberry 4 seems to not be supported

[dluksza]

Don't know what I'm missing right now. After modifying source code to use card1, downgrading my local flutter to 1.9.1 I still can't see the demo app.

It seems that app is running, flutter-pi doesn't exit it just stops, but nothing is visible on the monitor. I've checked both HDHMI outputs, also activated fake_KMS, for now I run out of ideas what could be wrong.

Also seems that flutter engine arguments are not respected, as you can see in the output I'm setting observatory-host, but later on flutter still prints 127.0.0.1 as observatory host.

Using touchscreen input from /dev/input/event0
Asset bundle path: /home/pi/flutter-raspberry/flutter_assets/
engine_argv[0] = /home/pi/flutter-pi/out/flutter-pi
engine_argv[1] = --observatory-host
engine_argv[2] = 192.168.0.16
initializing display...
Opening DRM device...
Getting DRM resources...
Finding a connected connector from 1 available connectors...
  connectors[0]: connected? yes, type: 0x0B (HDMI-A), 340mm x 190mm
Choosing DRM mode from 26 available modes...
  modes[0]: name: "1366x768", 1366x768p, 60Hz, type: 72, flags: 5
the chosen DRM mode is preferred by DRM. (DRM_MODE_TYPE_PREFERRED)
Display properties:
  1366 x 768, 60Hz
  340mm x 190mm
  pixel_ratio = 1.057276
Finding DRM encoder...
Creating GBM device
Querying EGL client extensions...
Getting EGL display for GBM device...
Initializing EGL...
Querying EGL display extensions...
Using display 18351384 with EGL version 1.4
===================================
EGL information:
  version: 1.4
  vendor: "Mesa Project"
  client extensions: "EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_wayland EGL_EXT_platform_x11 EGL_MESA_platform_gbm EGL_MESA_platform_surfaceless EGL_EXT_platform_device"
  display extensions: "EGL_ANDROID_blob_cache EGL_EXT_buffer_age EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_WL_bind_wayland_display "
===================================
Binding OpenGL ES API...
Choosing EGL config...
Finding EGL configs with appropriate attributes...
Creating EGL context...
Creating EGL window surface...
===================================
OpenGL ES 2.x information:
  version: "OpenGL ES 3.0 Mesa 19.2.0-rc1"
  shading language version: "OpenGL ES GLSL ES 3.00"
  vendor: "Broadcom"
  renderer: "V3D 4.2"
  extensions: "GL_EXT_blend_minmax GL_EXT_multi_draw_arrays GL_EXT_texture_format_BGRA8888 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_mapbuffer GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_stencil8 GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_EXT_texture_sRGB_decode GL_OES_EGL_image GL_OES_depth_texture GL_OES_packed_depth_stencil GL_EXT_texture_type_2_10_10_10_REV GL_OES_get_program_binary GL_APPLE_texture_max_level GL_EXT_discard_framebuffer GL_EXT_read_format_bgra GL_EXT_frag_depth GL_NV_fbo_color_attachments GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_array_object GL_EXT_occlusion_query_boolean GL_EXT_texture_rg GL_EXT_unpack_subimage GL_NV_draw_buffers GL_NV_read_buffer GL_NV_read_depth GL_NV_read_depth_stencil GL_NV_read_stencil GL_EXT_draw_buffers GL_EXT_map_buffer_range GL_KHR_debug GL_KHR_texture_compression_astc_ldr GL_OES_depth_texture_cube_map GL_OES_required_internalformat GL_OES_surfaceless_context GL_EXT_color_buffer_float GL_EXT_sRGB_write_control GL_EXT_separate_shader_objects GL_EXT_shader_integer_mix GL_EXT_base_instance GL_EXT_compressed_ETC1_RGB8_sub_texture GL_EXT_draw_elements_base_vertex GL_EXT_texture_border_clamp GL_KHR_context_flush_control GL_OES_draw_elements_base_vertex GL_OES_texture_border_clamp GL_OES_texture_stencil8 GL_EXT_float_blend GL_KHR_no_error GL_KHR_texture_compression_astc_sliced_3d GL_OES_EGL_image_external_essl3 GL_MESA_shader_integer_functions GL_KHR_parallel_shader_compile GL_EXT_texture_query_lod "
===================================
Swapping buffers...
Locking front buffer...
getting new framebuffer for BO...
Setting CRTC...
Clearing current context...
finished display setup!
Initializing Input devices...
Initializing Application...
Initializing Plugin Registry...
Initialized Services plugin.
[elm327plugin] elm_open: process doesn't have access to serial device "/dev/rfcomm0": No such file or directory
[elm327plugin] ELM327Plugin_init: ELM327 communication was not initialized successfully. elm327plugin won't supply any OBDII data. error code: No such file or directory
[elm327plugin] running pid query queue processor
[ERROR:flutter/shell/platform/embedder/embedder_surface_gl.cc(107)] Could not create a resource context for async texture uploads. Expect degraded performance. Set a valid make_resource_current callback on FlutterOpenGLRendererConfig.
flutter: Observatory listening on http://127.0.0.1:35297/gARv1zh8gSg=/
[ERROR:flutter/shell/platform/embedder/embedder_surface_gl.cc(107)] Could not create a resource context for async texture uploads. Expect degraded performance. Set a valid make_resource_current callback on FlutterOpenGLRendererConfig.
flutter engine successfully started up.
Running IO thread...
Sending kAdd 0 to Flutter Engine
Running message loop...
Sending kAdd 1 to Flutter Engine
Sending kAdd 2 to Flutter Engine
Sending kAdd 3 to Flutter Engine
Sending kAdd 4 to Flutter Engine
Sending kAdd 5 to Flutter Engine
Sending kAdd 6 to Flutter Engine
Sending kAdd 7 to Flutter Engine
Sending kAdd 8 to Flutter Engine
Sending kAdd 9 to Flutter Engine

[ardera]

Hmm, that's weird. In your previous issue you said you're running Raspbian Buster Lite, so I assume you're not running a desktop environment, is that correct?

The thing is, I don't have a Pi 4 to test so it's just luck if something works on the 4 out of the box. Getting OpenGL to work without X or Wayland is just that buggy. You mess up one thing, maybe some buffer is not in the right format, and it just outputs nothing without throwing any errors.
I'm pretty sure it doesn't stop though, after the Sending kAdd X to Flutter Engine messages flutter-pi initialization is done and there's no more logging.
Maybe you could try running kmscube (probably need to install it), with the --device=/dev/dri/card1 argument, or enable Full-KMS and see if that works.

Also seems that flutter engine arguments are not respected, as you can see in the output I'm setting observatory-host, but later on flutter still prints 127.0.0.1 as observatory host.

Yeah, I know about that one. Seems to be a bug in the engine, I'm not sure whats causing it.

[dluksza]

Hmm, that's weird. In your previous issue you said you're running Raspbian Buster Lite, so I assume you're not running a desktop environment, is that correct?

Yes, I'm not running X.

The thing is, I don't have a Pi 4 to test so it's just luck if something works on the 4 out of the box.

No worries, I'm not blaming you nor I'm upset that it doesn't work. Lets try to figure why it isn't and make flutter-pi compatible with Pi 4. I'm open for helping you making that happen ;)

Maybe you could try running kmscube (probably need to install it), with the --device=/dev/dri/card1 argument, or enable Full-KMS and see if that works.

I've installed kmscube, and it worked without any other packages or configuration. Just out of the box it renders a spinning cube with gradients ;) Here is the output, if it helps with anything:

Using display 0x1aff308 with EGL version 1.4
===================================
EGL information:
  version: "1.4"
  vendor: "Mesa Project"
  client extensions: "EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_wayland EGL_EXT_platform_x11 EGL_MESA_platform_gbm EGL_MESA_platform_surfaceless EGL_EXT_platform_device"
  display extensions: "EGL_ANDROID_blob_cache EGL_EXT_buffer_age EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_WL_bind_wayland_display "
===================================
OpenGL ES 2.x information:
  version: "OpenGL ES 3.0 Mesa 19.2.0-rc1"
  shading language version: "OpenGL ES GLSL ES 3.00"
  vendor: "Broadcom"
  renderer: "V3D 4.2"
  extensions: "GL_EXT_blend_minmax GL_EXT_multi_draw_arrays GL_EXT_texture_format_BGRA8888 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_mapbuffer GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_stencil8 GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_EXT_texture_sRGB_decode GL_OES_EGL_image GL_OES_depth_texture GL_OES_packed_depth_stencil GL_EXT_texture_type_2_10_10_10_REV GL_OES_get_program_binary GL_APPLE_texture_max_level GL_EXT_discard_framebuffer GL_EXT_read_format_bgra GL_EXT_frag_depth GL_NV_fbo_color_attachments GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_array_object GL_EXT_occlusion_query_boolean GL_EXT_texture_rg GL_EXT_unpack_subimage GL_NV_draw_buffers GL_NV_read_buffer GL_NV_read_depth GL_NV_read_depth_stencil GL_NV_read_stencil GL_EXT_draw_buffers GL_EXT_map_buffer_range GL_KHR_debug GL_KHR_texture_compression_astc_ldr GL_OES_depth_texture_cube_map GL_OES_required_internalformat GL_OES_surfaceless_context GL_EXT_color_buffer_float GL_EXT_sRGB_write_control GL_EXT_separate_shader_objects GL_EXT_shader_integer_mix GL_EXT_base_instance GL_EXT_compressed_ETC1_RGB8_sub_texture GL_EXT_draw_elements_base_vertex GL_EXT_texture_border_clamp GL_KHR_context_flush_control GL_OES_draw_elements_base_vertex GL_OES_texture_border_clamp GL_OES_texture_stencil8 GL_EXT_float_blend GL_KHR_no_error GL_KHR_texture_compression_astc_sliced_3d GL_OES_EGL_image_external_essl3 GL_MESA_shader_integer_functions GL_KHR_parallel_shader_compile GL_EXT_texture_query_lod "
===================================

How can I help to make flutter-pi working on Pi 4?

[ardera]

I'm open for helping you making that happen ;)

Thanks!

How can I help to make flutter-pi working on Pi 4?

There are many things we could try.
I'm pretty sure the problem is somewhere in modeset and GL ES context creation, (the init_display procedure). There are some environment variables you can set in order to make mesa print some debugging info (see here), i.e. LIBGL_DEBUG=verbose, MESA_DEBUG=1 and EGL_LOG_LEVEL=debug. You can try setting these and see if they output some errors. Also, you can try setting MESA_GLES_VERSION_OVERRIDE=2.0, to see if maybe the higher GLES version on the pi 4 is the cause.

In the meantime I'll try making init_display more verbose. I will create a new branch devel-pi4 for this.

I also had to apply some hacks to glGetString(GL_EXTENSIONS), because it originally listed some extensions that were not supported by the v3d driver for VideoCore 4. I'm not sure whether that could be the cause though. The flutter engine should print some error messages if it doesn't find some gl procedures that it needs, also that'd mean setting MESA_GLES_VERSION_OVERRIDE=2.0 would fix that.

[dluksza]

Here is the output with all the debug flags set.

Kinda interesting is that DRI configuration seems to be not found, also libEGL complains about some optional missing extensions and not supported formats. Other than that output looks completly normal for me. I'll also switch to devel-pi4 and wait for your updates ;)

Using touchscreen input from /dev/input/event0
Asset bundle path: /home/pi/flutter-raspberry/flutter_assets/
engine_argv[0] = /home/pi/flutter-pi/out/flutter-pi
initializing display...
Opening DRM device...
Getting DRM resources...
Finding a connected connector from 1 available connectors...
  connectors[0]: connected? yes, type: 0x0B (HDMI-A), 340mm x 190mm
Choosing DRM mode from 26 available modes...
  modes[0]: name: "1366x768", 1366x768p, 60Hz, type: 72, flags: 5
the chosen DRM mode is preferred by DRM. (DRM_MODE_TYPE_PREFERRED)
Display properties:
  1366 x 768, 60Hz
  340mm x 190mm
  pixel_ratio = 1.057276
Finding DRM encoder...
Creating GBM device
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /root/.drirc: No such file or directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /root/.drirc: No such file or directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /root/.drirc: No such file or directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /root/.drirc: No such file or directory.
drmOpenDevice: node name is /dev/dri/renderD128
drmOpenDevice: open result is 5, (OK)
drmOpenDevice: node name is /dev/dri/renderD129
drmOpenDevice: node name is /dev/dri/renderD130
drmOpenDevice: node name is /dev/dri/renderD131
drmOpenDevice: node name is /dev/dri/renderD132
drmOpenDevice: node name is /dev/dri/renderD133
drmOpenDevice: node name is /dev/dri/renderD134
drmOpenDevice: node name is /dev/dri/renderD135
drmOpenDevice: node name is /dev/dri/renderD136
drmOpenDevice: node name is /dev/dri/renderD137
drmOpenDevice: node name is /dev/dri/renderD138
drmOpenDevice: node name is /dev/dri/renderD139
drmOpenDevice: node name is /dev/dri/renderD140
drmOpenDevice: node name is /dev/dri/renderD141
drmOpenDevice: node name is /dev/dri/renderD142
drmOpenDevice: node name is /dev/dri/renderD143
drmOpenDevice: node name is /dev/dri/renderD128
drmOpenDevice: open result is 5, (OK)
drmOpenDevice: node name is /dev/dri/renderD129
drmOpenDevice: node name is /dev/dri/renderD130
drmOpenDevice: node name is /dev/dri/renderD131
drmOpenDevice: node name is /dev/dri/renderD132
drmOpenDevice: node name is /dev/dri/renderD133
drmOpenDevice: node name is /dev/dri/renderD134
drmOpenDevice: node name is /dev/dri/renderD135
drmOpenDevice: node name is /dev/dri/renderD136
drmOpenDevice: node name is /dev/dri/renderD137
drmOpenDevice: node name is /dev/dri/renderD138
drmOpenDevice: node name is /dev/dri/renderD139
drmOpenDevice: node name is /dev/dri/renderD140
drmOpenDevice: node name is /dev/dri/renderD141
drmOpenDevice: node name is /dev/dri/renderD142
drmOpenDevice: node name is /dev/dri/renderD143
drmOpenDevice: node name is /dev/dri/renderD128
drmOpenDevice: open result is 5, (OK)
drmOpenDevice: node name is /dev/dri/renderD129
drmOpenDevice: node name is /dev/dri/renderD130
drmOpenDevice: node name is /dev/dri/renderD131
drmOpenDevice: node name is /dev/dri/renderD132
drmOpenDevice: node name is /dev/dri/renderD133
drmOpenDevice: node name is /dev/dri/renderD134
drmOpenDevice: node name is /dev/dri/renderD135
drmOpenDevice: node name is /dev/dri/renderD136
drmOpenDevice: node name is /dev/dri/renderD137
drmOpenDevice: node name is /dev/dri/renderD138
drmOpenDevice: node name is /dev/dri/renderD139
drmOpenDevice: node name is /dev/dri/renderD140
drmOpenDevice: node name is /dev/dri/renderD141
drmOpenDevice: node name is /dev/dri/renderD142
drmOpenDevice: node name is /dev/dri/renderD143
drmOpenDevice: node name is /dev/dri/renderD128
drmOpenDevice: open result is 5, (OK)
drmOpenDevice: node name is /dev/dri/renderD129
drmOpenDevice: node name is /dev/dri/renderD130
drmOpenDevice: node name is /dev/dri/renderD131
drmOpenDevice: node name is /dev/dri/renderD132
drmOpenDevice: node name is /dev/dri/renderD133
drmOpenDevice: node name is /dev/dri/renderD134
drmOpenDevice: node name is /dev/dri/renderD135
drmOpenDevice: node name is /dev/dri/renderD136
drmOpenDevice: node name is /dev/dri/renderD137
drmOpenDevice: node name is /dev/dri/renderD138
drmOpenDevice: node name is /dev/dri/renderD139
drmOpenDevice: node name is /dev/dri/renderD140
drmOpenDevice: node name is /dev/dri/renderD141
drmOpenDevice: node name is /dev/dri/renderD142
drmOpenDevice: node name is /dev/dri/renderD143
drmOpenDevice: node name is /dev/dri/renderD128
drmOpenDevice: open result is 5, (OK)
drmGetBusid returned 'NULL'
Querying EGL client extensions...
Getting EGL display for GBM device...
Initializing EGL...
libEGL debug: found extension `DRI_TexBuffer'
libEGL info: found extension DRI_TexBuffer version 2
libEGL debug: found extension `DRI2_Flush'
libEGL info: found extension DRI2_Flush version 4
libEGL debug: found extension `DRI_IMAGE'
libEGL info: found extension DRI_IMAGE version 17
libEGL debug: found extension `DRI_RENDERER_QUERY'
libEGL debug: found extension `DRI_CONFIG_QUERY'
libEGL debug: found extension `DRI2_Throttle'
libEGL debug: found extension `DRI2_Fence'
libEGL debug: found extension `DRI2_BufferDamage'
libEGL debug: found extension `DRI2_Interop'
libEGL debug: found extension `DRI_NoError'
libEGL debug: found extension `DRI2_Blob'
libEGL debug: found extension `DRI_TexBuffer'
libEGL debug: found extension `DRI2_Flush'
libEGL debug: found extension `DRI_IMAGE'
libEGL info: found extension DRI_IMAGE version 17
libEGL debug: found extension `DRI_RENDERER_QUERY'
libEGL info: found extension DRI_RENDERER_QUERY version 1
libEGL debug: found extension `DRI_CONFIG_QUERY'
libEGL info: found extension DRI_CONFIG_QUERY version 1
libEGL debug: found extension `DRI2_Throttle'
libEGL debug: found extension `DRI2_Fence'
libEGL info: found extension DRI2_Fence version 2
libEGL debug: found extension `DRI2_BufferDamage'
libEGL info: found extension DRI2_BufferDamage version 1
libEGL debug: found extension `DRI2_Interop'
libEGL info: found extension DRI2_Interop version 1
libEGL debug: found extension `DRI_NoError'
libEGL info: found extension DRI_NoError version 1
libEGL debug: found extension `DRI2_Blob'
libEGL info: found extension DRI2_Blob version 1
libEGL debug: did not find optional extension DRI_Robustness version 1
libEGL debug: did not find optional extension DRI_FlushControl version 1
libEGL debug: did not find optional extension DRI_MutableRenderBufferDriver version 1
libEGL debug: No DRI config supports native format R8  
libEGL debug: No DRI config supports native format GR88
libEGL debug: No DRI config supports native format AR15
libEGL debug: No DRI config supports native format XB24
libEGL debug: No DRI config supports native format AB24
libEGL debug: No DRI config supports native format XR30
libEGL debug: No DRI config supports native format AR30
libEGL debug: No DRI config supports native format XB30
Querying EGL display extensions...
Using display 2053400 with EGL version 1.4
===================================
EGL information:
  version: 1.4
  vendor: "Mesa Project"
  client extensions: "EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_wayland EGL_EXT_platform_x11 EGL_MESA_platform_gbm EGL_MESA_platform_surfaceless EGL_EXT_platform_device"
  display extensions: "EGL_ANDROID_blob_cache EGL_EXT_buffer_age EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_WL_bind_wayland_display "
===================================
Binding OpenGL ES API...
Choosing EGL config...
Finding EGL configs with appropriate attributes...
Creating EGL context...
Creating EGL window surface...
===================================
OpenGL ES 2.x information:
  version: "OpenGL ES 2.0 Mesa 19.2.0-rc1"
  shading language version: "OpenGL ES GLSL ES 1.0.16"
  vendor: "Broadcom"
  renderer: "V3D 4.2"
  extensions: "GL_EXT_blend_minmax GL_EXT_multi_draw_arrays GL_EXT_texture_format_BGRA8888 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_mapbuffer GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_stencil8 GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_OES_EGL_image GL_OES_depth_texture GL_OES_packed_depth_stencil GL_EXT_texture_type_2_10_10_10_REV GL_OES_get_program_binary GL_APPLE_texture_max_level GL_EXT_discard_framebuffer GL_EXT_read_format_bgra GL_EXT_frag_depth GL_NV_fbo_color_attachments GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_array_object GL_EXT_occlusion_query_boolean GL_EXT_texture_rg GL_EXT_unpack_subimage GL_NV_draw_buffers GL_NV_read_buffer GL_NV_read_depth GL_NV_read_depth_stencil GL_NV_read_stencil GL_EXT_draw_buffers GL_EXT_map_buffer_range GL_KHR_debug GL_KHR_texture_compression_astc_ldr GL_OES_depth_texture_cube_map GL_OES_required_internalformat GL_OES_surfaceless_context GL_EXT_separate_shader_objects GL_EXT_compressed_ETC1_RGB8_sub_texture GL_EXT_draw_elements_base_vertex GL_EXT_texture_border_clamp GL_KHR_context_flush_control GL_OES_draw_elements_base_vertex GL_OES_texture_border_clamp GL_KHR_no_error GL_KHR_texture_compression_astc_sliced_3d GL_KHR_parallel_shader_compile "
===================================
Swapping buffers...
Locking front buffer...
getting new framebuffer for BO...
Setting CRTC...
Clearing current context...
finished display setup!
Initializing Input devices...
Initializing Application...
Initializing Plugin Registry...
Initialized Services plugin.
[elm327plugin] elm_open: process doesn't have access to serial device "/dev/rfcomm0": No such file or directory
[elm327plugin] ELM327Plugin_init: ELM327 communication was not initialized successfully. elm327plugin won't supply any OBDII data. error code: No such file or directory
[elm327plugin] running pid query queue processor
[ERROR:flutter/shell/platform/embedder/embedder_surface_gl.cc(107)] Could not create a resource context for async texture uploads. Expect degraded performance. Set a valid make_resource_current callback on FlutterOpenGLRendererConfig.
[ERROR:flutter/shell/platform/embedder/embedder_surface_gl.cc(107)] Could not create a resource context for async texture uploads. Expect degraded performance. Set a valid make_resource_current callback on FlutterOpenGLRendererConfig.
flutter engine successfully started up.
Running IO thread...
Running message loop...
Sending kAdd 0 to Flutter Engine
Sending kAdd 1 to Flutter Engine
Sending kAdd 2 to Flutter Engine
Sending kAdd 3 to Flutter Engine
Sending kAdd 4 to Flutter Engine
Sending kAdd 5 to Flutter Engine
Sending kAdd 6 to Flutter Engine
Sending kAdd 7 to Flutter Engine
Sending kAdd 8 to Flutter Engine
Sending kAdd 9 to Flutter Engine
flutter: Observatory listening on http://127.0.0.1:35087/eqsI5kUJQTc=/

[ardera]

Yeah, it looks pretty much the same for me, except for the lines that start with drmOpenDevice. These are not there for me.

I just now pushed a new commit to devel-pi4 that contains some more verbose modesetting. The DRM device is now chosen automatically, so you now longer need to patch the /dev/dri/card0 to /dev/dri/card1. Also, I tried to change some things to be more close to the kmscube code, maybe that helps.

Could you try and run that? You no longer need to specify the GL ES version override environment variable, the appropriate glGetString is now chosen depending on the underlying graphics chip (vc4 or vc6). If you see some error messages from the flutter engine or skia, basically saying the GL context initialization failed or something like that, that means the vc6 needs a hacked glGetString too.

[dluksza]

Still no luck :| I don't see any errors, also checked dmesg but nothing caught my attention. I even recompile flutter bundle again from scratch. Still nothing shows on the screen.

Using touchscreen input from /dev/input/event0
Asset bundle path: /home/pi/flutter-raspberry/flutter_assets/
engine_argv[0] = /home/pi/flutter-pi/out/flutter-pi
initializing display...
Finding a suitable DRM device, since none is given...
looking for a suitable DRM device from 2 available DRM devices...
  devices[0]: 
    available nodes: DRM_NODE_PRIMARY, 
    nodes[DRM_NODE_PRIMARY] = "/dev/dri/card1"
    bustype: DRM_BUS_PLATFORM
    businfo.fullname: /soc/gpu
    opening DRM device candidate at "/dev/dri/card1"...
    getting resources of DRM device candidate at "/dev/dri/card1"...
    flutter-pi chose "/dev/dri/card1" as its DRM device.
  devices[1]: 
    available nodes: DRM_NODE_PRIMARY, DRM_NODE_RENDER
    nodes[DRM_NODE_PRIMARY] = "/dev/dri/card0"
    nodes[DRM_NODE_RENDER] = "/dev/dri/renderD128"
    bustype: DRM_BUS_PLATFORM
    businfo.fullname: /v3dbus/v3d@7ec04000
Finding a connected connector from 1 available connectors...
  connectors[0]: connected? yes, type: 0x0B (HDMI-A), 340mm x 190mm
Choosing DRM mode from 26 available modes...
  modes[0]: name: "1366x768", 1366x768p, 60Hz, type: 72, flags: 5
    this mode is preferred by DRM. (DRM_MODE_TYPE_PREFERRED)
  modes[1]: name: "1920x1080", 1920x1080p, 60Hz, type: 64, flags: 5
  modes[2]: name: "1920x1080", 1920x1080p, 60Hz, type: 64, flags: 5
  modes[3]: name: "1920x1080", 1920x1080p, 50Hz, type: 64, flags: 5
  modes[4]: name: "1280x800", 1280x800p, 60Hz, type: 64, flags: 9
  modes[5]: name: "1280x720", 1280x720p, 60Hz, type: 64, flags: 5
  modes[6]: name: "1280x720", 1280x720p, 60Hz, type: 64, flags: 5
  modes[7]: name: "1280x720", 1280x720p, 50Hz, type: 64, flags: 5
  modes[8]: name: "1024x768", 1024x768p, 75Hz, type: 64, flags: 5
  modes[9]: name: "1024x768", 1024x768p, 70Hz, type: 64, flags: 10
  modes[10]: name: "1024x768", 1024x768p, 66Hz, type: 0, flags: 6
  modes[11]: name: "1024x768", 1024x768p, 60Hz, type: 64, flags: 10
  modes[12]: name: "832x624", 832x624p, 75Hz, type: 64, flags: 10
  modes[13]: name: "800x600", 800x600p, 75Hz, type: 64, flags: 5
  modes[14]: name: "800x600", 800x600p, 72Hz, type: 64, flags: 5
  modes[15]: name: "800x600", 800x600p, 60Hz, type: 64, flags: 5
  modes[16]: name: "800x600", 800x600p, 56Hz, type: 64, flags: 5
  modes[17]: name: "720x576", 720x576p, 50Hz, type: 64, flags: 10
  modes[18]: name: "720x480", 720x480p, 60Hz, type: 64, flags: 10
  modes[19]: name: "720x480", 720x480p, 60Hz, type: 64, flags: 10
  modes[20]: name: "640x480", 640x480p, 75Hz, type: 64, flags: 10
  modes[21]: name: "640x480", 640x480p, 73Hz, type: 64, flags: 10
  modes[22]: name: "640x480", 640x480p, 67Hz, type: 64, flags: 10
  modes[23]: name: "640x480", 640x480p, 60Hz, type: 64, flags: 10
  modes[24]: name: "640x480", 640x480p, 60Hz, type: 64, flags: 10
  modes[25]: name: "720x400", 720x400p, 70Hz, type: 64, flags: 6
Display properties:
  1366 x 768, 60Hz
  340mm x 190mm
  pixel_ratio = 1.057276
Finding DRM encoder...
Creating GBM device
Querying EGL client extensions...
Getting EGL display for GBM device...
Initializing EGL...
Querying EGL display extensions...
Using display 19212960 with EGL version 1.4
===================================
EGL information:
  version: 1.4
  vendor: "Mesa Project"
  client extensions: "EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_wayland EGL_EXT_platform_x11 EGL_MESA_platform_gbm EGL_MESA_platform_surfaceless EGL_EXT_platform_device"
  display extensions: "EGL_ANDROID_blob_cache EGL_EXT_buffer_age EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_WL_bind_wayland_display "
===================================
Binding OpenGL ES API...
Choosing EGL config...
Finding EGL configs with appropriate attributes...
Creating EGL context...
Creating EGL window surface...
===================================
OpenGL ES information:
  version: "OpenGL ES 3.0 Mesa 19.2.0-rc1"
  shading language version: "OpenGL ES GLSL ES 3.00"
  vendor: "Broadcom"
  renderer: "V3D 4.2"
  extensions: "GL_EXT_blend_minmax GL_EXT_multi_draw_arrays GL_EXT_texture_format_BGRA8888 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_mapbuffer GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_stencil8 GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_EXT_texture_sRGB_decode GL_OES_EGL_image GL_OES_depth_texture GL_OES_packed_depth_stencil GL_EXT_texture_type_2_10_10_10_REV GL_OES_get_program_binary GL_APPLE_texture_max_level GL_EXT_discard_framebuffer GL_EXT_read_format_bgra GL_EXT_frag_depth GL_NV_fbo_color_attachments GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_array_object GL_EXT_occlusion_query_boolean GL_EXT_texture_rg GL_EXT_unpack_subimage GL_NV_draw_buffers GL_NV_read_buffer GL_NV_read_depth GL_NV_read_depth_stencil GL_NV_read_stencil GL_EXT_draw_buffers GL_EXT_map_buffer_range GL_KHR_debug GL_KHR_texture_compression_astc_ldr GL_OES_depth_texture_cube_map GL_OES_required_internalformat GL_OES_surfaceless_context GL_EXT_color_buffer_float GL_EXT_sRGB_write_control GL_EXT_separate_shader_objects GL_EXT_shader_integer_mix GL_EXT_base_instance GL_EXT_compressed_ETC1_RGB8_sub_texture GL_EXT_draw_elements_base_vertex GL_EXT_texture_border_clamp GL_KHR_context_flush_control GL_OES_draw_elements_base_vertex GL_OES_texture_border_clamp GL_OES_texture_stencil8 GL_EXT_float_blend GL_KHR_no_error GL_KHR_texture_compression_astc_sliced_3d GL_OES_EGL_image_external_essl3 GL_MESA_shader_integer_functions GL_KHR_parallel_shader_compile GL_EXT_texture_query_lod "
===================================
Swapping buffers...
Locking front buffer...
getting new framebuffer for BO...
Setting CRTC...
Clearing current context...
finished display setup!
Initializing Input devices...
Initializing Application...
Initializing Plugin Registry...
Initialized Services plugin.
[elm327plugin] elm_open: process doesn't have access to serial device "/dev/rfcomm0": No such file or directory
[elm327plugin] ELM327Plugin_init: ELM327 communication was not initialized successfully. elm327plugin won't supply any OBDII data. error code: No such file or directory
[elm327plugin] running pid query queue processor
[ERROR:flutter/shell/platform/embedder/embedder_surface_gl.cc(107)] Could not create a resource context for async texture uploads. Expect degraded performance. Set a valid make_resource_current callback on FlutterOpenGLRendererConfig.
[ERROR:flutter/shell/platform/embedder/embedder_surface_gl.cc(107)] Could not create a resource context for async texture uploads. Expect degraded performance. Set a valid make_resource_current callback on FlutterOpenGLRendererConfig.
flutter engine successfully started up.
Running IO thread...
Sending kAdd 0 to Flutter Engine
Sending kAdd 1 to Flutter Engine
Sending kAdd 2 to Flutter Engine
Sending kAdd 3 to Flutter Engine
Sending kAdd 4 to Flutter Engine
Sending kAdd 5 to Flutter Engine
Running message loop...
Sending kAdd 6 to Flutter Engine
Sending kAdd 7 to Flutter Engine
Sending kAdd 8 to Flutter Engine
Sending kAdd 9 to Flutter Engine
flutter: Observatory listening on http://127.0.0.1:43251/atB1HJLPjUE=/

[ardera]

Pushed another small update. flutter-pi should now be doing exactly the same things that kmscube is doing to initialize the display. If this doesn't work, maybe the problem isn't in display initialization after all.

By the way, the native resolution of your display is 1366x768, right? At least that's the one flutter-pi chooses (because it has the DRM_MODE_TYPE_PREFERRED type). I'm kinda confused because in the modes listing, it says your display also supports 1920x1080 60Hz.

May I ask what App you are trying to run using flutter-pi? Just the example flutter create app, or something else?

[dluksza]

By the way, the native resolution of your display is 1366x768, right?

Yes, the native resolution should be 1366 x 768

May I ask what App you are trying to run using flutter-pi?

I'm running flutter create, the counter app with target platform set to Fuchsia. It's build on my desktop using downgraded version of flutter, I usually work on the beta channel.

Still it doesn't work. The screen not even flickers, it stays black all the time :( Here is the output.

root@raspberrypi:~# /home/pi/flutter-pi/out/flutter-pi -t /dev/input/event0 /home/pi/flutter-raspberry/flutter_assets/
Using touchscreen input from /dev/input/event0
Asset bundle path: /home/pi/flutter-raspberry/flutter_assets/
engine_argv[0] = /home/pi/flutter-pi/out/flutter-pi
initializing display...
Finding a suitable DRM device, since none is given...
looking for a suitable DRM device from 2 available DRM devices...
  devices[0]: 
    available nodes: DRM_NODE_PRIMARY, 
    nodes[DRM_NODE_PRIMARY] = "/dev/dri/card1"
    bustype: DRM_BUS_PLATFORM
    businfo.fullname: /soc/gpu
    opening DRM device candidate at "/dev/dri/card1"...
    getting resources of DRM device candidate at "/dev/dri/card1"...
    flutter-pi chose "/dev/dri/card1" as its DRM device.
  devices[1]: 
    available nodes: DRM_NODE_PRIMARY, DRM_NODE_RENDER
    nodes[DRM_NODE_PRIMARY] = "/dev/dri/card0"
    nodes[DRM_NODE_RENDER] = "/dev/dri/renderD128"
    bustype: DRM_BUS_PLATFORM
    businfo.fullname: /v3dbus/v3d@7ec04000
Finding a connected connector from 1 available connectors...
  connectors[0]: connected? yes, type: 0x0B (HDMI-A), 340mm x 190mm
Choosing DRM mode from 26 available modes...
  modes[0]: name: "1366x768", 1366x768p, 60Hz, type: 72, flags: 5
    this mode is preferred by DRM. (DRM_MODE_TYPE_PREFERRED)
  modes[1]: name: "1920x1080", 1920x1080p, 60Hz, type: 64, flags: 5
  modes[2]: name: "1920x1080", 1920x1080p, 60Hz, type: 64, flags: 5
  modes[3]: name: "1920x1080", 1920x1080p, 50Hz, type: 64, flags: 5
  modes[4]: name: "1280x800", 1280x800p, 60Hz, type: 64, flags: 9
  modes[5]: name: "1280x720", 1280x720p, 60Hz, type: 64, flags: 5
  modes[6]: name: "1280x720", 1280x720p, 60Hz, type: 64, flags: 5
  modes[7]: name: "1280x720", 1280x720p, 50Hz, type: 64, flags: 5
  modes[8]: name: "1024x768", 1024x768p, 75Hz, type: 64, flags: 5
  modes[9]: name: "1024x768", 1024x768p, 70Hz, type: 64, flags: 10
  modes[10]: name: "1024x768", 1024x768p, 66Hz, type: 0, flags: 6
  modes[11]: name: "1024x768", 1024x768p, 60Hz, type: 64, flags: 10
  modes[12]: name: "832x624", 832x624p, 75Hz, type: 64, flags: 10
  modes[13]: name: "800x600", 800x600p, 75Hz, type: 64, flags: 5
  modes[14]: name: "800x600", 800x600p, 72Hz, type: 64, flags: 5
  modes[15]: name: "800x600", 800x600p, 60Hz, type: 64, flags: 5
  modes[16]: name: "800x600", 800x600p, 56Hz, type: 64, flags: 5
  modes[17]: name: "720x576", 720x576p, 50Hz, type: 64, flags: 10
  modes[18]: name: "720x480", 720x480p, 60Hz, type: 64, flags: 10
  modes[19]: name: "720x480", 720x480p, 60Hz, type: 64, flags: 10
  modes[20]: name: "640x480", 640x480p, 75Hz, type: 64, flags: 10
  modes[21]: name: "640x480", 640x480p, 73Hz, type: 64, flags: 10
  modes[22]: name: "640x480", 640x480p, 67Hz, type: 64, flags: 10
  modes[23]: name: "640x480", 640x480p, 60Hz, type: 64, flags: 10
  modes[24]: name: "640x480", 640x480p, 60Hz, type: 64, flags: 10
  modes[25]: name: "720x400", 720x400p, 70Hz, type: 64, flags: 6
Display properties:
  1366 x 768, 60Hz
  340mm x 190mm
  pixel_ratio = 1.057276
Finding DRM encoder...
Creating GBM device
Querying EGL client extensions...
Getting EGL display for GBM device...
Initializing EGL...
Querying EGL display extensions...
Using display 4401736 with EGL version 1.4
===================================
EGL information:
  version: 1.4
  vendor: "Mesa Project"
  client extensions: "EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_wayland EGL_EXT_platform_x11 EGL_MESA_platform_gbm EGL_MESA_platform_surfaceless EGL_EXT_platform_device"
  display extensions: "EGL_ANDROID_blob_cache EGL_EXT_buffer_age EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_WL_bind_wayland_display "
===================================
Binding OpenGL ES API...
Choosing EGL config...
Finding EGL configs with appropriate attributes...
Creating EGL context...
Creating EGL window surface...
===================================
OpenGL ES information:
  version: "OpenGL ES 3.0 Mesa 19.2.0-rc1"
  shading language version: "OpenGL ES GLSL ES 3.00"
  vendor: "Broadcom"
  renderer: "V3D 4.2"
  extensions: "GL_EXT_blend_minmax GL_EXT_multi_draw_arrays GL_EXT_texture_format_BGRA8888 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_mapbuffer GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_stencil8 GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_EXT_texture_sRGB_decode GL_OES_EGL_image GL_OES_depth_texture GL_OES_packed_depth_stencil GL_EXT_texture_type_2_10_10_10_REV GL_OES_get_program_binary GL_APPLE_texture_max_level GL_EXT_discard_framebuffer GL_EXT_read_format_bgra GL_EXT_frag_depth GL_NV_fbo_color_attachments GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_array_object GL_EXT_occlusion_query_boolean GL_EXT_texture_rg GL_EXT_unpack_subimage GL_NV_draw_buffers GL_NV_read_buffer GL_NV_read_depth GL_NV_read_depth_stencil GL_NV_read_stencil GL_EXT_draw_buffers GL_EXT_map_buffer_range GL_KHR_debug GL_KHR_texture_compression_astc_ldr GL_OES_depth_texture_cube_map GL_OES_required_internalformat GL_OES_surfaceless_context GL_EXT_color_buffer_float GL_EXT_sRGB_write_control GL_EXT_separate_shader_objects GL_EXT_shader_integer_mix GL_EXT_base_instance GL_EXT_compressed_ETC1_RGB8_sub_texture GL_EXT_draw_elements_base_vertex GL_EXT_texture_border_clamp GL_KHR_context_flush_control GL_OES_draw_elements_base_vertex GL_OES_texture_border_clamp GL_OES_texture_stencil8 GL_EXT_float_blend GL_KHR_no_error GL_KHR_texture_compression_astc_sliced_3d GL_OES_EGL_image_external_essl3 GL_MESA_shader_integer_functions GL_KHR_parallel_shader_compile GL_EXT_texture_query_lod "
===================================
Swapping buffers...
Locking front buffer...
getting new framebuffer for BO...
Setting CRTC...
Clearing current context...
finished display setup!
Initializing Input devices...
Initializing Application...
Initializing Plugin Registry...
Initialized Services plugin.
[elm327plugin] elm_open: process doesn't have access to serial device "/dev/rfcomm0": No such file or directory
[elm327plugin] ELM327Plugin_init: ELM327 communication was not initialized successfully. elm327plugin won't supply any OBDII data. error code: No such file or directory
[elm327plugin] running pid query queue processor
[ERROR:flutter/shell/platform/embedder/embedder_surface_gl.cc(107)] Could not create a resource context for async texture uploads. Expect degraded performance. Set a valid make_resource_current callback on FlutterOpenGLRendererConfig.
[ERROR:flutter/shell/platform/embedder/embedder_surface_gl.cc(107)] Could not create a resource context for async texture uploads. Expect degraded performance. Set a valid make_resource_current callback on FlutterOpenGLRendererConfig.
flutter engine successfully started up.
Running IO thread...
Sending kAdd 0 to Flutter Engine
Sending kAdd 1 to Flutter Engine
Sending kAdd 2 to Flutter Engine
Running message loop...
Sending kAdd 3 to Flutter Engine
Sending kAdd 4 to Flutter Engine
Sending kAdd 5 to Flutter Engine
Sending kAdd 6 to Flutter Engine
Sending kAdd 7 to Flutter Engine
Sending kAdd 8 to Flutter Engine
Sending kAdd 9 to Flutter Engine
flutter: Observatory listening on http://127.0.0.1:46687/zmB1S5bxOE4=/
***PRESENT***
***PRESENT***

[ardera]

There one more thing we can try, we can disable all GL ES extensions and override the GL version to 2.0 (using the environment variable you used before). Maybe the V3D driver reports some things as working even though they aren't, similiar to the VideoCore IV driver.

I'm afraid simple debugging ends after that though.

EDIT: Just pushed the commit.

[dluksza]

we can disable all GL ES extensions and override the GL version to 2.0 (using the environment variable you used before

Just tired it and it didn't worked :|

I can give you ssh access to my PI4 if you would like. Also you could send/push your flutter_assets that are known to work so that I can verify it with something that works for sure.

[ardera]

I can give you ssh access to my PI4 if you would like.

That would certainly allow me to test all the things, but how are we gonna tell if something actually works? There seems to be no remote viewing solution for headless linux. There used to be dispmanx_vnc, but that's probably not working anymore, now that dispmanx is obsolete.

I also just bought a Raspberry Pi 4 (2GB version), it will arrive tomorrow.

My asset bundle is this: https://1drv.ms/u/s!AsNHmDqMr-aVgcgAhAGjCx7T2nkrmw?e=j8HLkR

[dluksza]

That would certainly allow me to test all the things, but how are we gonna tell if something actually works?

Well... we can get creative, eg. I can start a YT stream and point camera to the other monitor :D But since you are getting your own PI 4 it probably won't be necessary.

I also just bought a Raspberry Pi 4 (2GB version), it will arrive tomorrow.

Cool! Can't wait for it! Thank you!

My asset bundle is this: https://1drv.ms/u/s!AsNHmDqMr-aVgcgAhAGjCx7T2nkrmw?e=j8HLkR

This doesn't improve the situation, still nothing is shown :|

[akilinomendez]

In case it helps, I run on raspberry pi 4 only change in flutter-pi.c

snprintf(drm.device, sizeof(drm.device), "/dev/dri/card1");

and make again.

Work perfectly.

[ardera]

In case it helps, I run on raspberry pi 4 only change in flutter-pi.c

snprintf(drm.device, sizeof(drm.device), "/dev/dri/card1");

Yeah, I already fixed that one in the devel-pi4 branch. But it still doesn't work for @dluksza , while kmscube, which basically does the same low-level graphics stuff as flutter-pi, works perfectly.

and make again.

Work perfectly.

Thanks! That's valuable information. That means the issue is probably not in flutter-pi, but somewhere else.

Would you mind if you both @dluksza @akilinomendez run raspinfo (install using sudo apt install raspinfo) and show me the output? Maybe the issue is the firmware or kernel version.

Also @dluksza, do you maybe have some other display lying around you can test? Maybe flutter doesn't like 1366x768. And I suppose you've already done that, but if you haven't, could you please do a full system upgrade using apt update & apt upgrade? You can also do a firmware update using rpi-eeprom-update (or rpi-update, not sure).

[dluksza]

Here output from raspinfo:

raspinfo.txt

I did upgraded raspbian a few days ago, will do it right now. Upgrading didn't fix the issue.

Unfortunately I don't have any other display at hand, but will try to find another one in couple of days and will inform if it did worked.

You can also do a firmware update using rpi-eeprom-update (or rpi-update, not sure)

The command is rpi-upgrade, I've run it a week or two ago. But will do it again right now... nope, didn't improve things. BTW. I'm running kernel 4.19.83-v7l+.

Also @akilinomendez, which version of raspbian are you using, did you installed X server or any other development libraries?

Maybe I've installed something inappropriate some kind of package, a lib or lib-dev that is making flutter upset.

BTW. I wanted to start today from scratch with new install of raspbian base, then give it a try to raspbinan with X pre-configured, but since we want to test the resolution, I'll hold of until I got a spare monitor to test on.