[Bug 16865] New: Flickering mouse pointer in dual head mode ( results also in crashes)

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16865

           Summary: Flickering mouse pointer in dual head mode (results also
                    in crashes)
           Product: xorg
           Version: unspecified
          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: graeter at hydrixos.org
         QAContact: xorg-team at lists.x.org


Created an attachment (id=17919)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=17919)
Xorg.0.log after the crash

When using the xorg radeon driver on my ATI Radeon Mobility x1400 I have
several strange misbehaviours of the mouse pointer:

1. There are areas on the screen where the mouse pointer begins to flicker if
you move it over. These areas seem are over the full vertical length of both
screens and in a distance of ca. 260 pixels. This bug is can be reproduced on
my machine everytime I use it in dual screen mode (it disappears in single
screen mode).

2. Also sometimes the mouse pointer disappears when moving it between both
heads and got replaced by a scrambled or semi-transparent line. A similar bug
was also inside FGLRX. It is a little bit hard to reproduce this bug.

The problem is, it is hard to recover the mouse pointer (only suspend-2-disk or
a complete restart helps) - and sometimes the X server hangs when this problem
appears. The strange thing in this situation is, that the mouse can be moved,
but the keyboard and the video output freezes. I've attached a Xorg.0.log-file
which shows the following debugging messages appearing after that problem:

[mi] EQ overflowing. The server is probably stuck in an infinite loop.
[mi] mieqEnequeue: out-of-order valuator event; dropping.


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