https://bugs.kde.org/show_bug.cgi?id=500477
Bug ID: 500477
Summary: Random, minor graphical artifacting when enabling
"Prefer color accuracy"
Classification: Plasma
Product: kwin
Version: 6.3.1
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: sybo...@gmail.com
Target Milestone: ---
SUMMARY
For context, I was previously only getting this artifacting in full screen
videos, but after the upgrade to 6.3.1, I noticed an option to enable 12bpc
display output (Prefer color accuracy), which I then enabled. After enabling
it, I'm noticing screen artifacting in the form of glitchy horizontal lines
spanning approximately the length of the default taskbar in HiDPI mode (200%)
on my 4K display. The artifacting is random, and I'm not sure how to reliably
reproduce it. My display is connected directly to the GPU that is doing the
rendering (confirmed with wayland-info and drm_info).
For reference, I have an ASUS FA617NT with an iGPU (680M) that is unused and my
dGPU (RX 7700S - Navi 33) that is being used. I am connecting an external
display directly to my dGPU and I disabled all other displays.
STEPS TO REPRODUCE
1. Enable "Prefer color accuracy"
2. Use various applications (I'm not sure of anything specific that causes this
to occur)
OBSERVED RESULT
Observe random screen artifacting in the form of glitchy horizontal bars
spanning the entire length of the screen for one frame at a time
EXPECTED RESULT
No artifacting
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.3.1
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.12.15-lqx1-1-lqx-15khz (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7735HS with Radeon Graphics
Memory: 14.9 GiB of RAM
Graphics Processor 1: AMD Radeon RX 7700S
Graphics Processor 2: AMD Radeon 680M
ADDITIONAL INFORMATION
I was unable to reproduce using this bug's steps as reference:
https://bugs.kde.org/show_bug.cgi?id=499935 so I don't think it's a duplicate
of that.
According to zamundaaa on Matrix, KMS offloading isn't used when "Prefer color
accuracy" is enabled, which may be relevant information for this issue.
>From my limited testing, I haven't seen artifacting when "Prefer efficiency" is
enabled.
--
You are receiving this mail because:
You are watching all bug changes.
