[Bug 67880] New: [Caicos] corruption in Firefox when editing text

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67880

          Priority: medium
            Bug ID: 67880
          Assignee: xorg-driver-ati at lists.x.org
           Summary: [Caicos] corruption in Firefox when editing text
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: luto at mit.edu
          Hardware: Other
            Status: NEW
           Version: git
         Component: Driver/Radeon
           Product: xorg

When editing text in Firefox (e.g. composing in gmail or editing a Trac wiki
page), entire lines of text frequently disappear.  Editing anything on them or
selecting them causes them to reappear.

This happens on two different Caicos (HD 6450) systems.  One is running
gnome-shell on Fedora 19, and the other is running Unity on Ubuntu 13.04.  In
the Fedora system, the driver version is
xorg-x11-drv-ati-7.1.0-5.20130408git6e74aacc5.fc19.x86_64.

The two machines have the same monitors.  xrandr on the F19 system says:

Screen 0: minimum 320 x 200, current 3360 x 1050, maximum 16384 x 16384
HDMI-0 connected primary 1680x1050+0+0 (normal left inverted right x axis y
axis) 473mm x 296mm
   1680x1050      60.0*+
   1280x1024      75.0     60.0  
   1152x864       75.0  
   1024x768       75.1     60.0  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
DVI-0 connected 1680x1050+1680+0 (normal left inverted right x axis y axis)
473mm x 296mm
   1680x1050      60.0*+
   1280x1024      75.0     60.0  
   1152x864       75.0  
   1024x768       75.1     60.0  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
VGA-0 disconnected (normal left inverted right x axis y axis)

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