To follow up after a bit more experimentation.

- Using the boot param 'module_blacklist=i915' makes things work pretty much ok. No obvious graphics glitches, it's able to play videos without the fans spinning up like crazy.

- The PCI device for networking seems unsupported, so usb-wifi card is needed to get networking working.

- I get no sounds. Pavucontrol lists "Dummy Output" as the only available output device, so I guess the PCI device for sound is also not supported. (My old laptop has "Built-in Audio Analog Stereo" output device in pavucontrol).

- I did not get the whole sys-gui-gpu thing to work sufficiently to test it, not sure if there's anything left to explore in that area. Mostly I think a more recent kernel is the thing that will eventually solve this.

Cheers,

Martin

On 8/10/22 20:14, Demi Marie Obenour wrote:
On Wed, Aug 10, 2022 at 08:36:33AM +0200, Martin Holst Swende wrote:

> On 8/10/22 05:10, Demi Marie Obenour wrote:
>> On Tue, Aug 09, 2022 at 08:11:35PM +0200, Martin Holst Swende wrote:
>>> Some follow-up. I tested also with a Fedora LiveCD, results are on the
>> gist (here:https://gist.github.com/holiman/83c76e4cd98d087719773486a77d9112#file-fedora-live-txt
>>> ) .
>>
>>> The Fedora livecd worked flawlessly, both wifi-wise and graphics-wise.
>> It
>>> was a fedora 36 -- whereas dom0 is still on Fedora32.
>>
>>> Is it in any way possible to try out some experimental repo where dom0
>> is
>>> more recent?
>>
>> No, but I would like to know if your problems go away with
>> kernel-latest.  If they do not, then this means that either Xen does not >> interact well with Linux’s graphics drivers, or that the Mesa version is
>> too old for your hardware.


> Unfortunately, they do not. I did that as the first thing after getting wifi
> to work, so the version 5.18.9-1 in the HCL, is kernel-latest.

> Happy to try out any suggestion/experiment.

1. Does i915.enable_psr2_sel_fetch=0 help?
2. What X11 driver is Xorg using?  If it is using Intel, does
   modesetting help?  If it is using modesetting, does Intel help?
3. Does HVM sys-gui-gpu work?  What about PV (not PVH!) sys-gui-gpu?

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.

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