On Mon, Nov 13, 2023 at 10:49:01AM +0100, Thomas Zimmermann wrote:
(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.
I thikn it would be more appropriate to revert 2fb9667, as e329cb5
doesn't look like -stable material. I'll go ahead and do that.
--
Thanks,
Sasha
