A similar thing is happening to me, on my Acer Aspire 5542, running Lucid:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/595335
A similar thing is happening to me, on my Acer Aspire 5542, running Lucid:
https:/ /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- ati/+bug/ 595335