"firmware/sysfb: Set firmware-framebuffer parent device" breaks lightdm on Ubuntu 22.04 using amdgpu

[Marek Olšák]

Attached is the revert commit that works for me. Tested with Radeon
6800 and Radeon 7900XTX.

Marek


Marek

On Wed, Jun 19, 2024 at 9:50 AM Thomas Zimmermann <tzimmermann at suse.de> wrote:
>
> Hi
>
> Am 13.06.24 um 07:59 schrieb Marek Olšák:
> > Hi Thomas,
> >
> > Commit 9eac534db0013aff9b9124985dab114600df9081 as per the title
> > breaks (crashes?) lightdm (login screen) such that all I get is the
> > terminal. It's also reproducible with tag v6.9 where the commit is
> > present.
>
> I was able to reproduce the problem with Ubutu 22.04 and later under
> qemu plus qxl, sort of. I login via gdm3 and then the quest machine
> switches off entirely.
>
> >
> > Reverting the commit fixes lightdm. A workaround is to bypass lightdm
> > by triggering auto-login. This is a bug report.
>
> The problem is that reverting the commit doesn't fix the issue for me.
> I'll try to do my own bisecting.
>
> Best regards
> Thomas
>
> >
> > (For AMD folks: It's also reproducible with amd-staging-drm-next.)
> >
> > Marek
>
> --
> --
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Frankenstrasse 146, 90461 Nuernberg, Germany
> GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
> HRB 36809 (AG Nuernberg)
>
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