Segmentation faults and low gpu usage.

[roninspin]

Hi! I use your ppa in Ubuntu noble (chroot) on my Red Magic 6 (android 12, adreno 660). Now I'm facing two problems with the Vulkan driver:

• segmentation faults when android UI elements are shown (animations, soft keyboard, notification shade, etc.).
• it doesn't use full gpu performance. My gpu runs at the minimum frequency all the time (gpu load is really low). But when I manually set the gpu to the max. freq. it gives me a significant performance boost. E.g, supertuxkart - 2x+ fps boost. Glxgears - from 1928 fps to 2377 fps. But this behavior does not apply to all programms/games. For example, Unigine Heaven does load the gpu so that it scales it's frequency normally. The same about games in Wine (with dxvk).
  P.S. I couldn't make a screen record as it also provokes a seg. fault.

[sunarowicz]

Hello, I second to this. I'm constantly getting segfault in glmark2 after installing drivers from this ppa in chroot running on Adreno 650. Sometimes it crashes immediately, sometimes after a while, but never reaches the test end. Supertuxkart crashes too. But glxmark seems to run fine.

To avoid any misconfiguration in the past I made a new chroot and installed drivers from this ppa right away. Still the same, see here:

tux@chroot-noble:~$ vblank_mode=0 MESA_NO_ERROR=1 TU_DEBUG=noconform MESA_LOADER_DRIVER_OVERRIDE=zink ZINK_DESCRIPTORS=lazy ZINK_DEBUG=compact glmark2 
ATTENTION: default value of option vblank_mode overridden by environment.
=======================================================
    glmark2 2023.01
=======================================================
    OpenGL Information
    GL_VENDOR:      Mesa
    GL_RENDERER:    zink Vulkan 1.3(Turnip Adreno (TM) 650 (MESA_TURNIP))
    GL_VERSION:     4.6 (Compatibility Profile) Mesa 25.0~git2412040600.2ade3e~oibaf-turnip-kgsl~n (git-2ade3ec 2024-12
    Surface Config: buf=32 r=8 g=8 b=8 a=8 depth=24 stencil=0 samples=0
    Surface Size:   800x600 windowed
=======================================================
[build] use-vbo=false:Segmentation fault

tux@chroot-noble:~$ nala search mesa-vulkan
mesa-vulkan-drivers 25.0~git2412040600.2ade3e~oibaf-turnip-kgsl~n [mesa-turnip-kgsl/noble main]
├── is installed
└── Mesa Vulkan graphics drivers

As I was curious I made another chroot where I installed drivers from the
mesa-vulkan-kgsl_24.1.0-devel-20240324_arm64.deb package I got from this post: xDoge26/proot-setup#26 (comment). In this case nothing crashes and everything runs fine.

Is there anything I could check to help to resolve this issue?

BTW: I also realized the low GPU usage. I never saw it to be utilized more than approx 30%. But do apply for both scenarios, for drivers from this ppa as well as from the downloaded package. So I guess this is "a feature" now.:o)

[sunarowicz]

@roninspin:

My gpu runs at the minimum frequency all the time (gpu load is really low). But when I manually set the gpu to the max. freq. it gives me a significant performance boost. E.g, supertuxkart - 2x+ fps boost. Glxgears - from 1928 fps to 2377 fps.

Could you please tell me, how do you manually set the GPU max frequency?

[MastaG]

Hi, I didn't face any sefaults when I was testing on both the Adreno 640 (OnePlus 7T Pro) and Adreno 750 (Galaxy S24).
I did however drop the zink_fixes patch.
I'll restore it, perhaps it makes a difference.

For the GPU frequency problems I couldn't find a solution either.
It sucks.
When I open Chrome in Android and scroll on a random webpage, my glmark/vkmark scores get better.
It seems that the proot environment doesn't drive up the GPU frequency on its own.

[sunarowicz]

@MastaG:

I'll restore it, perhaps it makes a difference.

Great, thank you! I'll test it again then.

For the GPU frequency problems I couldn't find a solution either. It sucks. When I open Chrome in Android and scroll on a random webpage, my glmark/vkmark scores get better. It seems that the proot environment doesn't drive up the GPU frequency on its own.

Same here. If I run glxgears while constantly moving the mouse on the desktop, the score is about 100 FPS higher comparing when mouse remains steady. If I instead do some scrolling in any Android app, the score is about 150 - 200 FPS higher. I recall myself that I discovered this already some 2 years ago when I started to investigate chroot containers on Android. So, no improvement since then:-(

We should not forget, that our "playground" sits on top of Android kernel modified by every vendor to its taste which is a "black box" for us and outside of our control...:-(

[sunarowicz]

@MastaG

Update: still segfaulting even with the current version from ppa:

=======================================================
    glmark2 2023.01
=======================================================
    OpenGL Information
    GL_VENDOR:      Mesa
    GL_RENDERER:    zink Vulkan 1.3(Turnip Adreno (TM) 650 (MESA_TURNIP))
    GL_VERSION:     4.6 (Compatibility Profile) Mesa 25.0~git2412150600.93dfe5~oibaf-turnip-kgsl~n (git-93dfe50 2024-12
    Surface Config: buf=32 r=8 g=8 b=8 a=8 depth=24 stencil=0 samples=0
    Surface Size:   800x600 windowed
=======================================================
[terrain] <default>:[1]    929 segmentation fault  glmark2 -b terrain

[sunarowicz]

BTW: This is the only test I found which stresses the GPU really high, up to ~70-99%:
https://www.shadertoy.com/view/lsVXRh

I run the browser with these parameters:
chromium --ignore-gpu-blocklist --use-gl=angle --use-angle=vulkan --enable-accelerated-video-decode --enable-features=Vulkan,VulkanFromANGLE,DefaultANGLEVulkan,VaapiIgnoreDriverChecks,VaapiVideoDecoder,PlatformHEVCDecoderSupport,UseMultiPlaneFormatForHardwareVideo