Comment # 11 on bug 1206843 from Takashi Iwai

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