Comment 19 for bug 926714

I am also affected by this bug, but I have radeon graphics on my desktop (Kubuntu 12.04, Intel i750, Radeon 4890). I had the same problem in Kubuntu 11.10 and also in Ubuntu 11.10 - it was one of the reasons why I used Catalyst before (it was not affected). Later I started using opensource radeon driver and learned to live with this bug.

I have also found that people with intel graphics have the same problem:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/653815

I can also confirm that workaround posted by jones works.

Some basic system info:

root@luboss-desktop:/# uname -a
Linux luboss-desktop 3.5.0-13-generic #13-Ubuntu SMP Tue Aug 28 08:31:47 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
root@luboss-desktop:/# lshw -c video
  *-display
       description: VGA compatible controller
       product: RV790 [Radeon HD 4890]
       vendor: Hynix Semiconductor (Hyundai Electronics)
       physical id: 0
       bus info: pci@0000:01:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:46 memory:e0000000-efffffff memory:fbee0000-fbeeffff ioport:ee00(size=256) memory:fbe00000-fbe1ffff
root@luboss-desktop:/#

If needed I am happy to provide more info...