[Bug 80255] New: Garbage around mouse pointer if setpointer is used with 2 cards and compositing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80255

          Priority: medium
            Bug ID: 80255
          Assignee: xorg-driver-ati at lists.x.org
           Summary: Garbage around mouse pointer if setpointer is used
                    with 2 cards and compositing
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: bcdonadio at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 7.2 (2007.02)
         Component: Driver/Radeon
           Product: xorg

Created attachment 101387
  --> https://bugs.freedesktop.org/attachment.cgi?id=101387&action=edit
Photo of the artifact on VirtualBox with Guest Additions

A square of garbage (made of old drawings of the screen) is drawn around the
mouse pointer if the client software tries to use setpointer (I think).

Reproducible if two radeon cards (RS780 and RV770) are used at the same time to
extend the desktop *and* there's a compositing window manager being used (KDE
and GNOME have the problem, OpenBox does not).

So far I could see the problem with:
* Firefox when showing a big image (like this one:
http://upload.wikimedia.org/wikipedia/commons/3/36/Axis_axis_%28Nagarhole%2C_2010%29.jpg
which requires the mouse pointer to be changed to a zoom-in/out magnifier icon)
* VirtualBox when using Guest Additions (seamless pointer integration)
* rdesktop-vrdp always

I'm using xorg-x11-server-Xorg 1.14.4-9.fc20, with kernels 3.14-3.16 (already
tried all three), and xorg-x11-drv-ati 7.2.0 (3.20131101git3b38701.fc20).

Will attach a photo of the glitch.

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