Re: i915 observations

[RVP <rvp%SDF.ORG@localhost>]

On Tue, 13 Dec 2022, Mayuresh wrote:

> Now the only problem left is this:
>
> During boot when the display switches mode, sometimes it manages to remain
> on, some other times it goes blank.
> [...]
> Once in a few reboots the display holds on and then I can reach all the
> way to X11.

Is this on the eDP or HDMI? Collect a blind dmesg (or better, ssh into
the laptop) after `boot -vx'. Another one where the display stays on
for comparison.

As a work around, you could try `Option "ReprobeOutputs" "on"' then
see if the X server turns your display (which?) back on again when it
starts.

> Update: HDMI output has a slow refresh problem though eDP works fine.
> Can't play videos on hdmi, even command line usage is jittery. Tried
> experimenting with modes, including low resolutions, but the problem
> persists.

Hmm. Don't know about this. Might be that UXA + HDMI doesn't work so well.

a) Try out different output drivers with mpv(1): use `--vo=help'

b) For DVD playback, see the XvMC-related options mentioned in intel(4).

-RVP