[Bug 105581] New: amdgpu: r9 380 Dual Monitor Setup: rotation not working

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=105581

            Bug ID: 105581
           Summary: amdgpu: r9 380 Dual Monitor Setup: rotation not
                    working
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.2.2, 4.3-rc3, 4.3-rc4
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: f.otti@gmx.at
        Regression: No

Created attachment 189561
  --> https://bugzilla.kernel.org/attachment.cgi?id=189561&action=edit
Xorg log of 4.3.rc3

Lengthy explanation posted here:
https://forums.gentoo.org/viewtopic-p-7824374.html

Dual Monitor setup doesn't seem to work at all when both are connected via DVI.
When one is connected to HDMI and the other to the first DVI, dual monitor only
works when one of them is connected after boot.
Both only work when one is connected to HDMI and the other to the second DVI. 
With neither configuration does rotating any screen work. Results in crash of
the X server (attachment).
Everything works as intended under Windows.

What I mean with "dual monitor is not working" is that both screens are
recognized as connected but one of the screens shows only a black picture, but
I can move applications to it (which I can't see).

Steps to reproduce: Boot computer and try to rotate one of the screens with the
KDE system settings or xrandr.

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