[Bug 215511] New: Dual monitor with amd 5700 causes system to hang at startup.

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215511

            Bug ID: 215511
           Summary: Dual monitor with amd 5700 causes system to hang at
                    startup.
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.16.1
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: pmestre@gmail.com
        Regression: No

Created attachment 300294
  --> https://bugzilla.kernel.org/attachment.cgi?id=300294&action=edit
dual monitor boot crash with amdgpu card.

Hello, system mostly crashes (sometimes in different ways) when i start with
more than one monitor attached.

If i switch off one monitor then system boots correctly (i don't need to detach
the displayport cable, just to switch off the monitor).


When both monitors are connected, most of the times it just crashes as the
attached log, sometimes it boots but screen is flickering and with artifacts.

This happened with kernel 5.10 and 5.11, it was fixed i don't remember exactly
when, and is happening again. For me it worked with kernel 5.15.8 and failed
with 5.15.13.
It is still failing with 5.16.1.

Kind regards and many thanks for your work in the most crucial open-source
project.

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