pre-0.7.0: With some GPUs, Kwin.app cannot start from DVD

[probonopd]

With some Nvidia GPUs, Kwin.app cannot start

DISPLAY=:0.0 QT_DEBUG_PLUGINS=1 /System/KWin.app/KWin 
Cannot load library /usr/local/lib/qt5/plugins/kf5/kwindowsystem/KF5WindowSystemX11Plugin.so: (/usr/local/lib/qt5/plugins/kf5/kwindowsystem/KF5WindowSystemX11Plugin.so: Undefined symbol "_ZTI23KWindowEffectsPrivateV2")

Afftected, e.g.:

• GT-1080

Workaround:

Put export=KWIN_COMPOSE=O2 into /usr/local/bin/start-hello

[probonopd]

Should be fixed by helloSystem/KWin#6 and 696e469.

Thanks @jsm222 for figuring this out.

Please comment here if the issue persists.

[probonopd]

It was reported on IRC that the issue persists for the NVIDIA GeForce GTX 1080.

It uses version 470.74 of the Nvidia drivers. https://www.mail-archive.com/debian-qt-kde@lists.debian.org/msg102470.html might be related.

[probonopd]

Try:

• Alt-F2
• xterm
• env KWIN_COMPOSE=O2 launch KWin

[probonopd]

(...)
kf.coreaddons: Checking for plugins in ("/System/KWin.app/Resources/plugins/org.kde.kwin.platforms", "/usr/local/lib/qt5/plugins/org.kde.kwin.platforms", "/System/KWin.app/Resources/org.kde.kwin.platforms")
Using stub for libKF5Crash
kwin_core: Extensions: shape: 0x "11"  composite: 0x "4"  render: 0x "b"  fixes: 0x "50"  randr: 0x "14"  sync: 0x "31"  damage: 0x  "11"
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5089:46: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5091:48: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5093:48: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5097:47: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5099:46: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5107:48: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5111:46: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5113:46: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5117:45: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/local/lib/X11/locale/en_US.UTF-8/Compose:5120:46: this compose sequence is a duplicate of another; skipping line
kf.coreaddons: Checking for plugins in ("/System/KWin.app/Resources/plugins/org.kde.kdecoration2", "/usr/local/lib/qt5/plugins/org.kde.kdecoration2", "/System/KWin.app/Resources/org.kde.kdecoration2")
kwin_core: User timestamp, ASN: 486982
kwin_core: User timestamp, final: KWin::X11Client(0x80a625900, windowId=0x140000b, caption="AppRun") : 486982
kwin_core: User timestamp, ASN: 4294967295
kwin_core: User timestamp, final: KWin::X11Client(0x80a626300, windowId=0x140000e, caption="AppRun") : 4294967295
kwin_core: User timestamp, ASN: 4294967295
kwin_core: User timestamp, final: KWin::X11Client(0x80a626800, windowId=0x1800006, caption="AppRun") : 4294967295
kf.coreaddons: Checking for plugins in ("/System/KWin.app/Resources/plugins/kwin/plugins", "/usr/local/lib/qt5/plugins/kwin/plugins", "/System/KWin.app/Resources/kwin/plugins")
kf.coreaddons: Checking for plugins in ("/System/KWin.app/Resources/plugins/org.kde.kwin.scenes", "/usr/local/lib/qt5/plugins/org.kde.kwin.scenes", "/System/KWin.app/Resources/org.kde.kwin.scenes")
kwin_core: Available scene plugin: "/System/KWin.app/Resources/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so"
kwin_core: Available scene plugin: "/System/KWin.app/Resources/plugins/org.kde.kwin.scenes/KWinSceneQPainter.so"
kwin_core: Available scene plugin: "/System/KWin.app/Resources/plugins/org.kde.kwin.scenes/KWinSceneXRender.so"
kwin_core: Attempting to load the OpenGL scene
kwin_scene_opengl: Initializing OpenGL compositing
OpenGL vendor string:                   NVIDIA Corporation
OpenGL renderer string:                 GeForce GTX 1080/PCIe/SSE2
OpenGL version string:                  4.5.0 NVIDIA 390.144
OpenGL shading language version string: 4.50 NVIDIA
Driver:                                 NVIDIA
Driver version:                         390.144
GPU class:                              Unknown
OpenGL version:                         4.5
GLSL version:                           4.50
X server version:                       1.20.11
Requires strict binding:                no
GLSL shaders:                           yes
Texture NPOT support:                   yes
Virtual Machine:                        no
kwin_scene_opengl: 0x0: OpenGL debug output initialized
kwin_scene_opengl: Initializing fences for synchronization with the X command stream
Using stub for libKF5Crash
Freeze in OpenGL initialization detected

[jsm222]

From the code

 m_openGLFreezeProtection->setInterval(15000);
            m_openGLFreezeProtection->setSingleShot(true);
            m_openGLFreezeProtection->start();
            const QString configName = kwinApp()->config()->name();
            m_openGLFreezeProtection->moveToThread(m_openGLFreezeProtectionThread);
            connect(m_openGLFreezeProtection, &QTimer::timeout, m_openGLFreezeProtection,
                [configName] {
                    const QString unsafeKey(QLatin1String("OpenGLIsUnsafe") + (kwinApp()->isX11MultiHead() ? QString::number(kwinApp()->x11ScreenNumber()) : QString()));
                    auto group = KConfigGroup(KSharedConfig::openConfig(configName), "Compositing");
                    group.writeEntry(unsafeKey, true);
                    group.sync();
                    KCrash::setDrKonqiEnabled(false);
                    qFatal("Freeze in OpenGL initialization detected");
                }, Qt::DirectConnection);

You hit the limit of 15 seconds, when booting from DVD because the I/O is very slow in the current iso layout. I just reproduced the issue on GT-730 which works fine when booting from USB.