[Bug 2147309] Re: [X1E] Display panel failure MEDION 14 S1 Elite

[James Addison]

Note: the dmesg output from the most recent Ubuntu Resolute daily
prerelease ISO (20260414) is largely similar, and the behaviour of the
device is the same (many systemd services start successfully, device
display goes blank and device reboots before reaching a graphical
desktop).

** Attachment added: "dmesg-resolute-daily-20260414.txt"
   https://bugs.launchpad.net/ubuntu-concept/+bug/2147309/+attachment/5961287/+files/dmesg-resolute-daily-20260414.txt

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Title:
  [X1E] Display panel failure MEDION 14 S1 Elite

Status in ubuntu-concept:
  New

Bug description:
  Hello,

  I have downloaded a recent Ubuntu Concept (resolute, 20260326) ISO and
  am attempting to boot my MEDION 14 S1 Elite from that image.

  By removing the 'quiet splash' kernel commandline arguments, I can see
  that it seems to make good progress starting the system (as I've
  mentioned in #2137257).

  However, after the boot sequence has begun multiple systemd services
  successfully, and attempts to switch to a graphical environment, the
  display turns blank and the laptop reboots.

  I've been able to access a bash shell on the laptop and to run dmesg
  to gather kernel output messages.  In particular there is one
  stacktrace related to probing the display driver that I think may be
  relevant.  I am attaching the (manually transcribed; beware typos)
  stacktrace and some of the preceding and subsequent dmesg log output
  with this bugreport.

  The error is reproducible; I can replicate it and the output seems
  similar aside from small details like the kthread and CPU ID.  Please
  let me know if I can provide more information to help track down the
  problem.

  Thanks,
  James

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