[Bug 90668] vertical stripes/glitches on secondary screen r9 280x

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=90668

            Bug ID: 90668
           Summary: vertical stripes/glitches on secondary screen r9 280x
           Product: Mesa
           Version: 10.5
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: net@ianni.de
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 116062
  --> https://bugs.freedesktop.org/attachment.cgi?id=116062&action=edit
photo

This is my first bug report here, so I hope i got everything right.

My system is Fedora 22. My GPU is a Sapphire 280x OC. My secondary screen,
connected via dvi, is showing strange vertical stripes, ca 3 cm wide. It seems
like someone cut the actual image in stripes and glued it together slightly
overlapping with flickering borders. 

If I take a screenshot everything looks normal (as it actually should look).

If I use it as the only screen, the stripes are also there.
(Is it a problem with the screen or the dvi connection?) I tried the second dvi
connection with the same result.

Using Windows, the screen has no issues.

output of xrandr:
http://paste.fedoraproject.org/225798/67516614

output of glxinfo:
http://paste.fedoraproject.org/225799/43267525

As mentioned, screenshots show the image as it should be, I had to take a photo
of the screen. I used a text file with the repeated series if numbers from 1 to
7.So one can see where the overlapping I mentioned happens (also in the spacing
of the buttons, missing glyphs etc..)
for example, after the first 1-7 sequence, the 1 and 2 are left out and so on.
I am sorry but I found no better way to show it, except making a video

If you need more information please let me know.

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