[Bug 99103] New: Same output (DisplayPort) is used in multi-head configuration for different Devices/Displays

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99103

            Bug ID: 99103
           Summary: Same output (DisplayPort) is used in multi-head
                    configuration for different Devices/Displays
           Product: xorg
           Version: 7.6 (2010.12)
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: Stefan.LAUTERWASSER at thalesgroup.com
        QA Contact: xorg-team at lists.x.org

Created attachment 128489
  --> https://bugs.freedesktop.org/attachment.cgi?id=128489&action=edit
Configuration is 8x monitors, 8x devices, 8x screens with 2x Radeon E6760
CompactPCI Boards (MEN G214)

The latest version I used was from Fedora 22, 4.2.6-200.fc22.x86_64.
I expect it was version 7.6 but I missed to save the log files.

The current configuration is CentOS 7 3.10.0-327.36.3.el7.x86_64 with module
version 7.5.

I was not able to detect any failure - it just look wrong and seam to be a
simple failure.

Xorg configuration is 8x monitors, 8x devices, 8x screens
with 2x Radeon E6760 CompactPCI Boards (MEN G214)
See attached Xorg.0.log.

== Result ==
Graphic Board ONE:
Monitor 1 and 2 are aktive/working - Monitor 3 and 4 is black.
Monitor 1 has Display :0.0.
Monitor 2 has Display :0.3.
Display :0.1 and :0.2 are working but not visible.
Display :0.1 and :0.2 seams to be between Monitor 1 and 2.
DisplayPort-1 will be used more often last DISPLAY is visible.

Graphic Board TWO:
Monitor 1 and 2 are aktive/working - Monitor 3 and 4 is black.
Monitor 1 has Display :0.4.
Monitor 2 has Display :0.7.
Display :0.5 and :0.6 are working but not visible.
Display :0.5 and :0.6 seams to be between Monitor 1 and 2.
DisplayPort-1 will be used more often last DISPLAY is visible.

Seams to be simple - right? I hope it is.
Please help, I don't want to use fglrx driver.
Oh, just for information - fglrx is working, but slower in our usecase.

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