Menu applet graphical vertical tearing on scroll

[Monn-i]

Distribution

Mint 21.2

Package version

Cinnamon 5.8.4

Graphics hardware in use

Intel Haswell-ULT Integrated Graphics

Frequency

Always

Bug description

• Menu applet graphically tears vertically and stays long periods in teared state after scrolling
• Left side column has scroll even though it doesn't need it, also reacts to scrolling the menu's group listing

Occurred right after Mint 21.2 upgrade.

Disabled 3rd-party applets, rebooted cinnamon, rebooted system, still occurs.

2023-07-18.09-07-12.mp4

Steps to reproduce

Open Menu applet, scroll menu groups

Expected behavior

Menu graphics not tearing when scrolling, left side column scrollbar not visible

Additional information

System: Lenovo Thinkpad X240
Display size: 1920x1080
Scaling: 1.0x

Theming (changing doesn't affect behavior, but just in case):

Applications: Mint-Y-Dark
Icons: Mint-Y-Yaru
Desktop: Mint-Y-Dark

[fredcw]

This was present in Mint 21.1 as well. It's also the same in CinnVIIStarkMenu applet. It doesn't happen in Cinnamenu though maybe because Cinnamenu doesn't use a scroll bar for the categories.

[zyoc]

I cannot duplicate that issue in 21.2.

Mouse Pointer: Cinnamon-Mint Large
Applications: Mint-X-Blue
Icons: Mint-X-Orange
Desktop: Graphite-Zero

Desktop: AMD Ryzen 9 5900X
Display: 2560 x 1440
Radeon RX 580

simplescreenrecorder-2023-07-19_05.28.26.mp4

[fredcw]

It doesn't happen in all cinnamon themes, it seems related to the size of l/r padding in style class .menu-categories-box. if l/r padding is less than 10px or if you replace l/r padding with l/r margin, it disappears. I've noticed that increasing the padding of .menu-applications-box causes it to happen in the apps list as well.

Edit: So it seems it's related to the size of the padding of the container inside St.ScrollView but only when the scrollbar is present.

[fredcw]

If I increase the left padding of St.Scrollview's child actor (categoriesBox) to 100px and scroll by dragging the scrollbar, I get this:

scroll-2023-07-19_19.25.40.webm

It seems to ignoring the child actor's padding when calculating the width to be scrolled, or something like that?

Edit: There's no problem when scrolling is caused by autoscroll though.

[JTEpic]

This tearing is happening to me on my laptop, fresh install of mint, I am using:

Mouse Pointer: Adwaita
Applications: Mint-Y-Dark
Icons: Mint-Y
Desktop: Mint-Y-Dark

Kernel: 5.15.0-84-generic
Cinnamon 5.8.4
Linux Mint 21.2
Intel Core i7-10610U
1920x1080
Integrated Graphics Mesa Intel UHD Graphics

[Monn-i]

This still occurs with latest Cinnamon, changes since I first opened the issue:

Distribution

Linux Mint 21.3

Package version

Cinnamon 6.0.4

Distribution

Mint 21.2

Package version

Cinnamon 5.8.4

Graphics hardware in use

Intel Haswell-ULT Integrated Graphics

Frequency

Always

Bug description

* Menu applet graphically tears vertically and stays long periods in teared state after scrolling

* Left side column has scroll even though it doesn't need it, also reacts to scrolling the menu's group listing

Occurred right after Mint 21.2 upgrade.

Disabled 3rd-party applets, rebooted cinnamon, rebooted system, still occurs.
2023-07-18.09-07-12.mp4

Steps to reproduce

Open Menu applet, scroll menu groups

Expected behavior

Menu graphics not tearing when scrolling, left side column scrollbar not visible

Additional information

System: Lenovo Thinkpad X240 Display size: 1920x1080 Scaling: 1.0x

Theming (changing doesn't affect behavior, but just in case):

Applications: Mint-Y-Dark Icons: Mint-Y-Yaru Desktop: Mint-Y-Dark

[blutuna]

> This still occurs with latest Cinnamon, changes since I first opened the issue:

This issue is no longer present on my machine with t̶h̶e̶ ̶u̶p̶d̶a̶t̶e̶ new install of 21.3...

Kernel: 6.2.0-39-generic x86_64 bits:
Desktop: Cinnamon 6.0.4 tk: GTK 3.24.33
Desktop Mobo: ASUSTeK model: TUF GAMING X570-PLUS (WI-FI)
16-core model: AMD Ryzen 9 5950X bits:
NVIDIA vendor: ASUSTeK driver: nvidia v: 535.154.05

[fredcw]

@claudiux This bug still exists and hasn't been fixed in 21.3. It's more noticeable in some themes rather than others, check my video above.

[claudiux]

I've read: "This issue is no longer present on my machine with t̶h̶e̶ ̶u̶p̶d̶a̶t̶e̶ new install of 21.3..." in #11760 (comment)

[blutuna]

I misspoke in my previous reply. In Ciinnamenu it doesn't appear but in Main Cinnamon Menu I do still see it.

[claudiux]

@fredcw
In /usr/share/cinnamon/applets/menu@cinnamon.org/applet.js, replacing the line 2727:
this.categoriesBox = new St.BoxLayout({ style_class: 'menu-categories-box',
by:
this.categoriesBox = new St.BoxLayout({ style_class: 'menu-applications-inner-box',
seems to solve the problem.

[blutuna]

I can confirm that replacing 'menu-categories-box' with 'menu-applications-inner-box' solves the issue on my machine.