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

[Thomas Zimmermann]

Hi

Am 13.06.24 um 16:20 schrieb 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.

IDK what Ubuntu supports, but 'systemctl status' or 'journalctl' might 
turn up something.

https://unix.stackexchange.com/questions/225401/how-to-see-full-log-from-systemctl-status-service

 From there, maybe with additional fprintf(stderr) output.

Best regards
Thomas

>
> Marek

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
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