[BUG] AMD GPU display flicker

[TianZerL]

Describe the bug

LE12 with AMD GPU will cause flicker, see photo in Context.

I have tested with lots of nightly builds (Generic.x86_64, date from 9.2 to 10.10), all got same issue.

I also tested with tow different computers, but no luck:

• Laptop with Ryzen 3500u and Vage8, which has a built-in 1080p 60 hz screen.
• Desktop with i7 8700K and 5700XT, which conneted to a 1080p 144hz screen via DP.

In the desktop, I tried change resolution and fresh rate, it can suppress the flicker somtimes but reappears if I go to another page (eg. from settings to main page).

Not sure if it is an AMD GPU only issue, I don't have an Intel GPU machine to test.

How to reproduce

Steps to reproduce the behavior:

1. Boot a LE12 Generic.x86_64 nightly build with an AMD GPU. (I use live mode)

Information

• LibreELEC Version: 12
• Hardware Platform: X86

Log file

http://ix.io/4IV3 (From 3500U laptop with LibreELEC-Generic.x86_64-12.0-nightly-20230902-8bfd54e.img.gz)

Context

[lrusak]

Possibly related https://gitlab.freedesktop.org/mesa/mesa/-/issues/7977

Might be able to use the env variable mesa_glthread=false

[TianZerL]

@lrusak

Might be able to use the env variable mesa_glthread=false

Thanks for reply. I can confirm it works.

related https://gitlab.freedesktop.org/mesa/mesa/-/issues/7977

This should be fixed in mesa 22.3.5, but it doesn't seem to be in branch 23.

Is there a way that I can set mesa_glthread=false before installing? I tried add a .config/kodi.conf file in my USB media's storage partition, but it is not work.

[lrusak]

@lrusak

Might be able to use the env variable mesa_glthread=false

Thanks for reply. I can confirm it works.

related https://gitlab.freedesktop.org/mesa/mesa/-/issues/7977

This should be fixed in mesa 22.3.5, but it doesn't seem to be in branch 23.

Is there a way that I can set mesa_glthread=false before installing?

I tried add a .config/kodi.conf file in my USB media's storage partition, but it is not work.

Not really. We should probably pull the fix into our tree or set the env variable in the build.

[mglae]

Boot a LE12 Generic.x86_64 nightly build with an AMD GPU. (I use live mode)

Is there a way that I can set mesa_glthread=false before installing? I tried add a .config/kodi.conf file in my USB media's storage partition, but it is not work.

Use "run" mode - but start with unmodified storage partition.

[RobGries]

I am also having the same trouble on the latest nightly build on an HP EliteDesk 705 G4 (Ryzen 5 PRO 2400GE APU with Vega 11 Graphics) .

I am trying to set the mesa_glthread=false environment variable, but I am afraid that it is not affecting the problem with flicker/graphics corruption. I tried setting it as an environment variable with export mesa_glthread=false and restarting kodi from ssh with systemctl restart kodi but that did nothing.

EDIT: I figured it out. To everyone having this problem, follow these steps:

1. Edit /storage/.config/kodi.conf with your editor of choice
2. Add the following line: mesa_glthread=false and save the file
3. Restart Kodi: systemctl stop kodi && systemctl start kodi
4. You should no longer see graphics corruption in Kodi with the AMD APUs.

[heitbaum]

Is this issue still occurring with latest LE12 20240311-86dba4b images?

[dod38fr]

This LE12 20240311-86dba4b image is working fine on my AMD system (with or without export mesa_glthread=false).

[heitbaum]

Retested on LE13 nightly (no changes to mesa_glthread required) - closing as done

=== tested on ===
Generic.x86_64-devel-20240815104328-b569b7a
Linux ser7 6.11.0-rc3 #1 SMP Thu Aug 15 09:45:31 UTC 2024 x86_64 GNU/Linux
Starting Kodi (22.0-ALPHA1 (21.90.700) Git:f02afef0f39f8a3770d0e9fd5483e8a53a1814d7). Platform: Linux x86 64-bit
Using Release Kodi x64
Kodi compiled 2024-08-14 by GCC 14.2.0 for Linux x86 64-bit version 6.11.0 (396032)
Running on LibreELEC (heitbaum): devel-20240815104328-b569b7a 13.0, kernel: Linux x86 64-bit version 6.11.0-rc3
FFmpeg version/source: 6.0.1
Host CPU: AMD Ryzen 7 7840HS w/ Radeon 780M Graphics     , 16 cores available
[    0.000000] DMI: AZW SER/SER, BIOS SER7PRO_P5C8V28 08/14/2023
[    0.000000] DMI: Memory slots populated: 2/2
CApplication::CreateGUI - using the gbm windowing system
EGL_VENDOR = Mesa Project
GL_VERSION = OpenGL ES 3.2 Mesa 24.2.0
libva info: VA-API version 1.22.0
libva info: Trying to open /usr/lib/dri/radeonsi_drv_video.so
vainfo: VA-API version: 1.22 (libva 2.22.0)
vainfo: Driver version: Mesa Gallium driver 24.2.0 for AMD Radeon 780M (radeonsi, gfx1103_r1, LLVM 18.1.8, DRM 3.58, 6.11.0-rc3)