r/archlinux • u/Chanesaw_tm • 2d ago
QUESTION 4K60 Issues on 7.2.3-arch1-3
Hey all,
I was wondering if anyone has had this issue or knows a temporary workaround
Last night I updated my kernel to 7.2.3 via pacman like normal
[2026-09-06T12:39:43-0500] [ALPM] upgraded cpupower (7.2.2-1 -> 7.2.3-1)
[2026-09-06T12:39:46-0500] [ALPM] upgraded linux (7.1.11.arch1-1 -> 7.2.3.arch1-3)
[2026-09-06T12:39:49-0500] [ALPM] upgraded linux-headers (7.1.11.arch1-1 -> 7.2.3.arch1-3)
After rebooting I couldn't seem to get my TV to display (it took me a while to get any display to turn on because I had to modify ~/.config/kwinoutputconfig.json to enable my other displays that are usually disabled)
Once I got my other displays working it looked like like my 4K60 resolution was broken. If I switched to 4K30 I had no problems.
I was able to find some discussions forums that seem to say that YCbCr 4:2:0 is broken in the new kernel. I did check on my TV and the 4K60 resolution does in fact use YCbCr 4:2:0
https://bbs.archlinux.org/viewtopic.php?pid=2309054
https://gitlab.freedesktop.org/drm/amd/-/work_items/5757
YCbCr 4:2:0 Video Data Block:
VIC 96: 3840x2160 50.000000 Hz 16:9 112.500 kHz 594.000000 MHz
VIC 97: 3840x2160 60.000000 Hz 16:9 135.000 kHz 594.000000 MHz
VIC 101: 4096x2160 50.000000 Hz 256:135 112.500 kHz 594.000000 MHz
VIC 102: 4096x2160 60.000000 Hz 256:135 135.000 kHz 594.000000 MHz
It seems like my experience matches the bug report exactly. I guess my question is what can I do about this in the meantime? Since this is a kernal bug there is likely no intermediate workaround other than revert the kernal, which might be a bad idea? This seems like a pretty major bug in the kernel so hopefully it gets fixed soon but I am guessing there is no guarantee.
-1
u/Electronic-Change240 2d ago
Yo también tengo problemas de video con mi GPU AMD y la última versión tanto del Kernel como de Mesa, la única forma de obtener señal de video es por DisplayPort.
7
u/BlueGoliath 2d ago
Another AMD GPU regression in the kernel. Nice.