https://bugzilla.suse.com/show_bug.cgi?id=1206843 https://bugzilla.suse.com/show_bug.cgi?id=1206843#c17 Patrik Jakobsson <patrik.jakobsson@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Flags|needinfo?(patrik.jakobsson@ | |suse.com) | --- Comment #17 from Patrik Jakobsson <patrik.jakobsson@suse.com> --- (In reply to Takashi Iwai from comment #11)

There seems still some issue with MST. Now we received a Lenovo dock and I've tested T14s Gen 3 with the Lenovo dock.

Both S3 and S4 work fine as long as no dock is connected or the dock is kept connected while suspend/resume (although we see some spurious kernel WARNING).

But when a dock is connected at S3/S4 and gets removed before the resume: the machine can be resumed on the laptop screen, but the monitor on the dock can't be enabled after re-plugging the dock.

(Actually, the first replug doesn't detect the monitor at all. When you replug twice, it'll probe the monitor, but the mode switching fails.)

On 6.1.12 and 6.2.9 kernels, the situation is better, the monitor works again after the second replug.

Patrik, on which kernel version is the DRM code of our SP5 based? I'm suspecting we're scratching the bug in the past upstream: https://gitlab.freedesktop.org/drm/amd/-/issues/2171

This sounds familiar. I updated DRM to v6.0 but AMDGPU to v6.1. While doing so I had to exclude a series of DP-MST refactoring from Lyude Paul [1]. Perhaps this is a series that is needed? IIRC these patches also affected the extra DG2 patches I had to add to i915. [1] https://patchwork.freedesktop.org/series/104844/#rev5 -- You are receiving this mail because: You are the assignee for the bug.