Re: Incomplete stable drm/ast backport - screen freeze on boot

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(cc: gregkh)

Hi Jocelyn

Am 13.11.23 um 10:36 schrieb Jocelyn Falempe:
On 13/11/2023 09:34, Keno Fischer wrote:
Greetings,

When connected to a remote machine via the BMC KVM functionality,
I am experiencing screen freezes on boot when using 6.5 stable,
but not master.

The BMC on the machine in question is an ASpeed AST2600.
A quick bisect shows the problematic commit to be 2fb9667
("drm/ast: report connection status on Display Port.").
This is commit f81bb0ac upstream.

I believe the problem is that the previous commit in the series
e329cb5 ("drm/ast: Add BMC virtual connector")
was not backported to the stable branch.
As a consequence, it appears that the more accurate DP state detection
is causing the kernel to believe that no display is connected,
even when the BMC's virtual display is in fact in use.
A cherry-pick of e329cb5 onto the stable branch resolves the issue.

Yes, you're right this two patches must be backported together.

I'm sorry I didn't pay enough attention, that only one of the two was picked up for the stable branch.

Is it possible to backport e329cb5 to the stable branch, or should I push it to drm-misc-fixes ?

I think stable, which is in cc, will pick up commit e329cb5 semi-automatically now. Otherwise, maybe ping gregkh in a few days about it.

Best regards
Thomas


Best regards,


--
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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