[Bug 15920] New: ATI Mobility M1 -- the mouse cursor garbles some underlying pixels

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15920

           Summary: ATI Mobility M1 -- the mouse cursor garbles some
                    underlying pixels
           Product: xorg
           Version: 7.3
          Platform: Other
               URL: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-
                    video-ati/+bug/194521
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: bryce at bryceharrington.org
         QAContact: xorg-team at lists.x.org


I'm forwarding a bug from a Ubuntu user:

"Using -ati 6.8.0 on Sony with ATI Mobility M1

I observe a line of garbled pixels under the mouse cursor, for example on the
initial login screen, and then they stay there no matter what is redrawn, like
that they are "burned in". Moving mouse cursor keep these pixels on the initial
location, and doesn't produce new, until something happens, when the "burned
in" pixels appear somewhere else, but again under the current place of the
cursor.

The effect never happens in Vesa mode. Here's conf:

Section "Device"
 Identifier "Generic Video Card"
 Boardname "ATI Rage Mobility"
 Busid "PCI:1:0:0"
 Driver "ati"
 Screen 0
 Vendorname "ATI"
 Option "MergedFB" "off"
EndSection

now, from all the observations, I'm quite sure that it's drawn by the same
mechanism that draws the main "hardware cursor", and that what I see must be a
second "hardware cursor" which "show flag" is unintentionally activated by some
initialization and reinitialization procedure.

http://launchpadlibrarian.net/14062548/Xorg.0.log
http://launchpadlibrarian.net/14062622/SecondCursorDrop1.jpg
http://launchpadlibrarian.net/14062647/SecondCursorDrop2.jpg


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