[Bug 91227] New: commit "Disable CRTCs when disabling the outputs" makes my 3rd screen flicker

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91227

            Bug ID: 91227
           Summary: commit "Disable CRTCs when disabling the outputs"
                    makes my 3rd screen flicker
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: fredrik at obra.se
        QA Contact: xorg-team at lists.x.org

VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde
PRO [Radeon HD 7750 / R7 250E] (prog-if 00 [VGA controller])
Subsystem: PC Partner Limited / Sapphire Technology Cape Verde PRO [Radeon HD
7750/8740 / R7 250E]
--

My 3rd display:
DVI-0 connected 1680x1050+3840+0 (normal left inverted right x axis y axis)
474mm x 296mm
   1680x1050     59.88*+
Flickers on and off a couple of times per minute. Nothing in dmesg but I see
this in xorg.log:

[   487.411] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Device
or resource busy
[   487.427] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Device
or resource busy
[   517.461] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Device
or resource busy
[   517.477] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Device
or resource busy


Reverting
http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/?id=ddaba449e8d6fe9fc0d97085e4045843fd8d7af9
solves my issues.

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