https://bugs.kde.org/show_bug.cgi?id=522435
Bug ID: 522435
Summary: Wayland: External DisplayPort monitor leaves ghost
trails only when rotated 90° counterclockwise on
NVIDIA
Classification: Plasma
Product: kwin
Version First 6.7.1
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: multi-screen
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Hardware:
- Lenovo ThinkPad P15 Gen 2
- NVIDIA RTX A4000 Laptop GPU
- NVIDIA Driver 595.80
- External 1920x1080 monitor connected via DisplayPort
Software:
- Fedora 44 KDE Spin
- Plasma 6.7.1
- KWin Wayland
Steps to reproduce:
1. Log into a Plasma Wayland session.
2. Connect an external DisplayPort monitor.
3. Rotate the external monitor 90° counterclockwise.
4. Move application windows around.
Observed result:
Window contents leave persistent ghost trails on the external monitor until the
affected area is repainted.
Expected result:
Windows should repaint correctly without leaving trails.
Additional information:
- The issue only occurs with 90° counterclockwise rotation.
- Landscape orientation works correctly.
- X11 works correctly.
- The monitor does not support VRR or HDR.
- Fractional scaling was enabled (external 115%, internal 125%).
- I am dualbooting windows 11 and fedora 44. I updated fedora from 42 to 44 and
there were not any problems at first. After that, I switched to windows for
about a week and the next login on fedora the problem appeared.
- Kwin 6.6.4 works correctly
- At the login screen on second monitor, the image is glitched between potrait
and landscape
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