kernel 6.5.0-26-generic causes 640x480 default resolution on aspeed (drm/ast) video

[Quesar]

The previous kernel 6.5.0-17 worked fine. With -26, the gdm login screen is only 640x480. I inspected the changelog from -17 to -26 and found '- Revert "drm/ast: report connection status on Display Port."' in the list. I found the reverted patch at https://www.spinics.net/lists/stable/msg682026.html.

I then built the 6.5.0-26 package with the "report connection" patch added and the resulting kernel has the correct resolution now.

Why was the "report connection" patch reverted? Can it please be put back in?

Hardware tested - Supermicro SYS-241E-TNRTTP. lspci shows this info for the ASPEED video controller:
02:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics Family (rev 52)
02:00.0 0300: 1a03:2000 (rev 52)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Quesar (rick-microway)]

Can the "drm/ast: report connection status on Display Port" patch please be readded to the kernel to fix this issue? Is there a particular reason not to add it? It was in the earlier releases of 6.5 but someone reverted it. I don't see anything logged about why it was reverted though.