[Bug 52330] New: Triple monitor desktop intermittent slow updates

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=52330

             Bug #: 52330
           Summary: Triple monitor desktop intermittent slow updates
    Classification: Unclassified
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: gitbisector at gmail.com
         QAContact: xorg-team at lists.x.org


Created attachment 64478
  --> https://bugs.freedesktop.org/attachment.cgi?id=64478
log when performance is slow, prints from 3154.543 and on are when I resize the
desktop and back

Been trying to get to the bottom of this and am now running with xf86-video-ati
module from git so should be able to add some debugging if needed to figure
this out. 

Bootup with 3 screens enabled (left-to-right: 1200x1920 + 2560x1600 +
1200x1920) on Radeon 6850 leads to very slow screen updates. However, changing
to just 2 monitors and then back to 3 seems to solve the problem most every
time for that session.

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