| Summary: |
KDE randomly connects external display either using RGB or YCBCR420 colorspace |
| Product: |
[Plasma] kwin
|
Reporter: |
Sergei Danilov <sergeidanilov> |
| Component: |
colour-management | Assignee: |
KWin default assignee <kwin-bugs-null> |
| Status: |
RESOLVED
UPSTREAM
|
|
|
| Severity: |
major
|
CC: |
nate, xaver.hugl
|
| Priority: |
NOR
|
|
|
| Version First Reported In: |
6.3.0 | |
|
| Target Milestone: |
--- | |
|
| Platform: |
Debian testing | |
|
| OS: |
Linux | |
|
|
Latest Commit:
|
|
Version Fixed/Implemented In:
|
|
|---|
|
Sentry Crash Report:
|
|
| |
|---|
| Attachments: |
YCBCR420 picture
RGB 8 bit picture
|
Created attachment 179523 [details] YCBCR420 picture I'm using LG C2 TV as monitor with KDE Plasma 6.3 My Lenovo X1 carbon Gen9 laptop allows using it with 4K@120HZ over type C with cable matters typec->hdmi adapter. Half of time KDE connects to the monitor using RGB 8 bit , which is looking totally fine. But another half connects with YCBCR420 8bit , which provides bad rainbow effect and makes text unreadable. The fact it there is no consistency makes me puzzled that that color space selection is not really controlled. I checked on Windows 11, it consistenly using RGB 8bit, so problem is specific to Linux. Problem is reproduced only with 4K@120HZ, 4K@60HZ Consistently using RGB. Hardware: Lenovo X1 carbon Gen9 cable matters typec->hdmi 4k 120Hz adapter LG C2 42" as monitor Software: Debian 12 Testing Kde Plasma 6.3 Wayland (But also was present with 5.27) Qt 6.7.2 Kernel 6.12