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

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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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