[Bug 215584] New: ASUS laptop cannot suspend with external USB-C monitor

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215584

            Bug ID: 215584
           Summary: ASUS laptop cannot suspend with external USB-C monitor
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.15.21
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Platform_x86
          Assignee: drivers_platform_x86@kernel-bugs.osdl.org
          Reporter: william.a.wall.4@gmail.com
        Regression: No

Created attachment 300421
  --> https://bugzilla.kernel.org/attachment.cgi?id=300421&action=edit
journalctl -b -k

I have an ASUS TUF Gaming A15 FA506QE_TUF506QE/FA506QE laptop. On kernel
5.15.21, it suspends just fine when using only the laptop. However, when
connected to an LG 43UD79-B monitor via USB-C (monitor supports DisplayPort
1.2), it wakes up almost immediately after suspend.

fwts s3 claims that this is due to:

kernel: asus_wmi: Unknown key c0 pressed

(and that log does not occur when suspending without the external monitor).

I also attempted this on a 5.16 kernel, but I was unable to get the nvidia
drivers compiled via DKMS and therefore it was not a similar test, as I am
fairly sure that the integrated graphics are not capable of driving the
external monitor.

Is there a way to configure the system to ignore that keypress? I was unable to
recreate it by mashing every possible combination of function keys I could
think of while running showkey.

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