Kernels >= 6.3 disable video output

[Michel Dänzer]

On 2025-05-15 19:59, Harry Wentland wrote:
> Hi Steven,
> 
> thanks for the bisect.
> 
> In order to avoid display artifacts (especially for HDR) we had to
> allow higher bit depth color output on the wire. The driver should
> fallback to a lower resolution as needed but looks like there's a
> bug with this particular TV. Are you able to share the specific
> TV model? We haven't seen this bug in internal testing but if we
> know which device shows the issue we might be able to find one
> for testing.
> 
> It would probably be good if we had a module parameter to force
> limit the output bpc in order to unblock users (like you) that see
> issues.
FWIW, with GNOME the "max bpc" property value can be set per monitor in the ~/.config/monitors.xml file. Other DEs might have something similar (with Xorg, it should even be possible to set it with xrandr).


-- 
Earthling Michel Dänzer       \        GNOME / Xwayland / Mesa developer
https://redhat.com             \               Libre software enthusiast