https://bugs.kde.org/show_bug.cgi?id=443355
Bug ID: 443355
Summary: Incorrect DPI settings on KDE Plasma when switched GPU
Product: kwin
Version: unspecified
Platform: openSUSE RPMs
OS: Linux
Status: REPORTED
Severity: grave
Priority: NOR
Component: xrandr
Assignee: kwin-bugs-n...@kde.org
Reporter: opendr...@gmail.com
Target Milestone: ---
Created attachment 142169
--> https://bugs.kde.org/attachment.cgi?id=142169&action=edit
After switching to NVIDIA, Plasma shows 225% scaling, but this is 100%
SUMMARY
When I change graphics from Intel to NVIDIA or NVIDIA to Intel the scaling is
reset to 100%, but the plasma displays the correct scaling of 225%.
Same problem
https://github.com/Askannz/optimus-manager/issues/208
Similar problem, but "solved" because display is not hidpi
https://github.com/Askannz/optimus-manager/issues/67
I also have correct dpi 96 in xorg-nvidia.conf
STEPS TO REPRODUCE
1. Set scale 225% on hidpi display
2. Switch GPU from Intel to NVIDIA
3. Switch scale to 200% and save
4. Switch scale back to 225%, save, logout and login. You will get the right
scaling
5. Switch GPU from NVIDIA to Intel and you will get the wrong scaling again
OBSERVED RESULT
Scaling settings are not applied when changing GPU
EXPECTED RESULT
Scaling should be the same when changing GPUs
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 20.04, KDE Neon, OpenSUSE LEap 15.3 with from Plasma
5.18.6 to 5.22.90
(available in About System)
KDE Plasma Version: 5.18.5 to 5.22.90
ADDITIONAL INFORMATION
Dell Precision 7530 with UHD Display, Intel UHD P630 + NVIDIA Quadro P3200
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