[Bug 205169] New: AMDGPU driver with Navi card hangs Xorg in fullscreen only.

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=205169

            Bug ID: 205169
           Summary: AMDGPU driver with Navi card hangs Xorg in fullscreen
                    only.
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.4.0-rc2
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: drjoms at gmail.com
        Regression: No

I have another problem logged with Navi + AMDGPU drivers. It's triggered
independently and reliable.
https://bugzilla.kernel.org/show_bug.cgi?id=204725

With that said, starting strictly and specifically with kernel version 5.4.0* I
have new problem.

I successfully load into Xorg. I can start OpenGL and Vulkan games in non full
screen. But once I start them - input devices hang, screen freezes. Machine is
responsive over SSH/ethernet. I can raise skinny elephants.

I tried opening a few games in non full screen mode and in full screen mode.
And i reliably hit bug everytime anything with OpenGL goes full screen on
native resolution of the screen.

I noticed, issue is less likely to happen if program goes full screen in non
native resolution.

I will attach details in files for DMESG, lsmod and some other things directly
as message, if they are short enough.

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