https://bugs.kde.org/show_bug.cgi?id=500754
John <ilikef...@waterisgone.com> changed:
What |Removed |Added
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CC| |ilikef...@waterisgone.com
--- Comment #7 from John <ilikef...@waterisgone.com> ---
I'm not sure, but I think I have the same problem here, on Debian 13 (Trixie) -
unstable repository, with:
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.11.0
Qt Version: 6.7.2
Kernel Version: 6.12.16-amd64 (64-bit)
Mesa Version: 25.0.0-1
Graphics Platform: Wayland
HARDWARE SPECIFICATIONS
Hardware: Laptop Dell Inspiron 5770 (17" 1080p@60Hz screen)
CPU: Intel® Core™ i5-8250U CPU @ 1.60GHz
GPU 1: Mesa Intel® UHD Graphics 620 (main, Vulkan capable)
GPU 2: AMD Radeon R5 M465 Series
RAM: 8 GiB (7.7 GiB usable)
kscreen-doctor -o shows this:
Output: 1 eDP-1
enabled
connected
priority 1
Panel
Modes: 1:1920x1080@60*! 2:1920x1080@48 3:1280x1024@60 4:1024x768@60
5:1280x800@60 6:1920x1080@60 7:1600x900@60 8:1368x768@60 9:1280x720@60
Geometry: 0,0 1477x831
Scale: 1.3
Rotation: 1
Overscan: 0
Vrr: incapable
RgbRange: Full
HDR: incapable
Wide Color Gamut: incapable
ICC profile: none
Color profile source: EDID
Color power preference: prefer efficiency and performance
Brightness control: supported, set to 97% and dimming to 100%
I tried all the environment variables discussed here:
export KWIN_DRM_DISABLE_BUFFER_READABILITY_CHECKS=1
export KWIN_DRM_DISABLE_TRIPLE_BUFFERING=1
export KWIN_DRM_NO_DIRECT_SCANOUT=1
And even some found in other places, that seem to improve Plasma a bit:
export QSG_RHI_BACKEND=vulkan
export QSG_RENDER_LOOP=threaded
But nothing works!
I noticed that a few old games in Steam, like Trine 1 (enchanted edition) and
Trine 2: complete story:
https://store.steampowered.com/bundle/12294/Trine_Ultimate_Collection/
Are running pretty bad compared to before, with very low FPS and an insane
amount of stuttering, like every 1-2 seconds
So, besides the already installed Steam client from Flathub
(com.valvesoftware.Steam), i also installed MangoHUD from Flathub
(org.freedesktop.Platform.VulkanLayer.MangoHud/x86_64/24.08) and configured it
a bit to show me only things I cared about and what I thought would help me
find the cause of that huge stuttering that makes the FPS continuously drop
from 30-40 something to 14-18 FPS.
At first I thought that it's again the stupid Steam client that it's trying
again to use the dedicated GPU, that is not faster than the integrated one and
also doesn't support Vulkan at all, so I scoured the internet until I found how
to properly force Steam to use the integrated one that supports Vulkan so DXVK
works and I combined it with the MangoHUD configuration enabling like this:
flatpak override --filesystem=xdg-config/MangoHud:ro
--env=DXVK_FILTER_DEVICE_NAME="Intel(R) UHD Graphics 620 (KBL GT2)"
com.valvesoftware.Steam
And it worked for making Steam use the GPU with better capabilities /
drivers...
But the situation didn't improve and the FPS continues to jump up and down
every 1-2 seconds!
Have a look at print screen on the frame time graph!
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