https://bugs.kde.org/show_bug.cgi?id=406769
Bug ID: 406769
Summary: Black flickering or black areas after reenabling
compositing on Intel and NVIDIA GPUs
Product: kwin
Version: 5.15.4
Platform: Kubuntu Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: jorgesan...@gmail.com
Target Milestone: ---
SUMMARY
This is a bug that I've seen on different systems for quite some time on both
Intel and NVIDIA GPUs (and I think radeon too). After reenabling compositing (I
disable compositing for games) the screen is filled with black areas after
opening new windows, on Intel GPUs those black areas start to flicker while on
NVIDIA GPUs the black areas remain still until you move the windows to such
areas. I don't know what is exactly causing this bugs but it should have
something to do with kwin and OpenGL compositing because when compositing
disabled those black areas do not appear. The issue is gone after I login
again.
SOFTWARE/OS VERSIONS
Linux: Kubuntu 19.04 (Linux 5.0.0-13-generic) (present in previous versions
too)
KDE Plasma Version: 5.15.4
KDE Frameworks Version: 5.56.0
Qt Version: 5.12.2
ADDITIONAL INFORMATION
I've seen this bug appear in the next GPUs:
Intel HD Graphics 5500 (Broadwell GT2) (OpenGL 4.5/Mesa 19.0.2)
Intel HD Graphics 500 (Broxton 2x6) (OpenGL 4.5/Mesa 19.0.2)
AMD Radeon R5 230 (CAICOS) (OpenGL 3.3/Mesa 19.0.2)
NVIDIA GeForce 840M (OpenGL 4.6/NVIDIA binary driver 418.56)
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