Incomplete stable drm/ast backport - screen freeze on boot

[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 ?

Best regards,

-- 

Jocelyn

> 
> Cheers,
> Keno
>