On 8/11/22 10:59, Demi Marie Obenour wrote:
On Thu, Aug 11, 2022 at 09:07:22AM +0200, Martin Holst Swende wrote:
>>> Happy to try out any suggestion/experiment.
>>
>> 1. Does i915.enable_psr2_sel_fetch=0 help?
> No, no change that I can see.
Okay, so that is not the problem.
>> 2. What X11 driver is Xorg using? If it is using Intel, does
>> modesetting help? If it is using modesetting, does Intel help?
> More full logs/notes can be found at
https://gist.github.com/holiman/83c76e4cd98d087719773486a77d9112#file-dom0_testing-txt
> .
> I'm not sure how to interpret the logs, it looks to me like "intel no,
> modesetting yes". Not sure how/what to change here, given a nudge in the
> right direction I can try to explore it more.
That is what it looks like to me also.
>> 3. Does HVM sys-gui-gpu work? What about PV (not PVH!) sys-gui-gpu?
> I don't have a sys-gui-gpu at the moment, but will test that. This page
> (https://www.qubes-os.org/doc/guivm-configuration/) is still the most
> relevant/recent description, right?
I think so? I don’t use sys-gui-gpu myself, and I will admit that there
are quite a few bugs when using it. Still, if it works, then the
possible parts of the code that could be to blame is much lower. If
sys-gui-gpu in PV mode works, then the problem is almost certainly the
userspace drivers (Mesa). If sys-gui-gpu in HVM mode works, but it
fails in PV mode, then the problem is likely in the way i915 and Xen
interact.
I have tested this now. When I boot, the problem remains. Opening the
Qube Manager shows that the sys-gui-gpu qube is not running. I tried
starting it from the manager,
and it led to immediate black screen, requiring a hard shutdown. The
logs for that qube are here:
https://gist.github.com/holiman/83c76e4cd98d087719773486a77d9112#file-guest-sys-gui-gpu-log
https://gist.github.com/holiman/83c76e4cd98d087719773486a77d9112#file-guest-sys-gui-gpu-dm-log
I then switched it to PV mode. Same thing, does not startup +
blackscreen if I start it explicitly.
>> If PV sys-gui-gpu with a dom0-provided kernel works, then the
problem is
>> almost certainly old dom0 userspace: either an old X server, old Mesa,
>> or both. If you could build modern Mesa and/or X11 for dom0 and try
>> again, that would be awesome.
> Left for future reference, I'm taking baby steps here :)
Valid :)
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