https://bugzilla.kernel.org/show_bug.cgi?id=208831

            Bug ID: 208831
           Summary: Waking up dual screen through Display Port and Dell
                    dock causes invalid opcode: 0000 [#1] SMP NOPTI
           Product: ACPI
           Version: 2.5
    Kernel Version: 5.4.0-050400-generic #201911242031
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: EC
          Assignee: acpi...@kernel-bugs.osdl.org
          Reporter: matthias.beaup...@gmail.com
        Regression: No

Created attachment 290793
  --> https://bugzilla.kernel.org/attachment.cgi?id=290793&action=edit
Kernel logs

My PC is connected to the monitor through a DisplayPort dock WD19DC from Dell.

How to reproduce :

* Connect a dual screen on Dell laptop through the Dock
* Wait idle until the screen goes black
* Move your mouse to wake up the screen : the screen on the display port stays
black
* Unplugged and plug again the display port : OS completely freeze without
mouse, keyboard or access to other TTY trought Alt + Ctrl + F[1-9].
* You have to force reboot the computer

Corresponding kernel log in attachement

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