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

[Marek Olšák]

On Thu, Jun 13, 2024 at 3:23 AM Thomas Zimmermann <tzimmermann at suse.de> wrote:
>
> Hi
>
> Am 13.06.24 um 08:00 schrieb Marek Olšák:
> > +amd-gfx
> >
> > On Thu, Jun 13, 2024 at 1:59 AM Marek Olšák <maraeo at gmail.com> wrote:
> >> 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.
> >>
> >> Reverting the commit fixes lightdm. A workaround is to bypass lightdm
> >> by triggering auto-login. This is a bug report.
>
> I see. Do you know why it crashes? Or have any logs.

How to debug this? I only know it's run through systemctl somehow.

Marek