This bug still persists in Ubuntu 12.10 for me, and it seems to be common amongst Dell Studio 1558 users.
uname - a:
Linux ciaran-Studio-1558 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Intel core i3 370m AMD Radeon HD5470
This bug still persists in Ubuntu 12.10 for me, and it seems to be common amongst Dell Studio 1558 users.
uname - a:
Linux ciaran-Studio-1558 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Intel core i3 370m
AMD Radeon HD5470