https://bugs.kde.org/show_bug.cgi?id=514078
Bug ID: 514078
Summary: Delay in image display on login on new screen
Classification: Plasma
Product: plasmashell
Version First 6.5.0
Reported In:
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Startup process
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: 1.0
Created attachment 188157
--> https://bugs.kde.org/attachment.cgi?id=188157&action=edit
Video showing the delay
I recently got a new MSI MAG 273Q X24 OLED monitor.
It's connected to a MSI 3080Ti running 590.48.01 via DP.
When KDE starts rendering (e.g. after boot, user change, tty change) it takes a
while (around 10s) to display the image on the new screen.
The other screen (140hz FullHD AOC) as well as the previous 140hz 1440p monitor
always display the image as soon as the screen is ready. In other scenarios
(Windows, BIOS, grub) the OLED MSI screen is waay faster to react too, so i
suspect it to be some bug in KDE.
This private video shows the delay after entering a different tty and going
back to plasma: https://youtube.com/shorts/nei8tzHx51I
LLM led me on a wild goose chase so far, but nothing helped or even worsened
the situation:
- cleared kscreen directory
- Disabled AMD iGPU via modprobe.blacklist=amdgpu
- Tuned NVIDIA power management (PerfLevelSrc=0x2222,
PreserveVideoMemoryAllocations=1)
- Attempted to disable Explicit Sync (KWIN_DRM_NO_AMS=1 - broke KDE)
- Tested KWIN_DRM_FORCE_FORMATS
- Disabled Night Color
- Logs don't show clear "pageflip" errors
- try to overwrite edid with kernelParam
"drm.edid_firmware=DP-3:edid/1920x1080.bin"
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