https://bugs.kde.org/show_bug.cgi?id=451283
Flupp <bugs.kde....@derflupp.e4ward.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bugs.kde.org@derflupp.e4war
| |d.com
--- Comment #5 from Flupp <bugs.kde....@derflupp.e4ward.com> ---
I can confirm the problem and can reliably reproduce it with windows of
selected applications, namely, Emacs, Firefox, and Hamster (a time tracker). I
cannot reproduce it with Qt applications or pure X11 applications like xlogo or
glxgears. Although my sample is small, I suppose it might only affect GTK
applications.
To reproduce, it is easiest to assign key combinations to “Maximize Window” and
“Quick Tile Window to the Left”. When maximizing a window of an affected
application and tiling it to the left afterwards, the right portion of the
screen keeps flashing the previous half of the window. It also works with just
toggling maximize, however, then the flashing portion is not so easily defined.
When enabling the “Show Paint” desktop effect and when there are only few
screen updates, it seems to me that outdated content is shown with every third
screen update. I therefore suspect that KWin uses triple buffering and one of
the buffers is not correctly invalidated. But of course I am just guessing
here.
Operating System: Arch Linux
KDE Plasma Version: 5.25.0
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.5
Kernel Version: 5.18.5-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: LENOVO
Product Name: 20L50000GE
System Version: ThinkPad T480
GTK2 Versions: 2.24.33-2
GTK3 Version: 1:3.24.34-1
```
$ kwin_x11 --replace
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) UHD Graphics 620 (KBL
GT2)
OpenGL version string: 4.6 (Compatibility Profile) Mesa 22.1.1
OpenGL shading language version string: 4.60
Driver: Intel
GPU class: Kaby Lake
OpenGL version: 4.6
GLSL version: 4.60
Mesa version: 22.1.1
X server version: 1.21.1
Linux kernel version: 5.18.5
Requires strict binding: yes
GLSL shaders: yes
Texture NPOT support: yes
Virtual Machine: no
```
--
You are receiving this mail because:
You are watching all bug changes.
