I just installed Ubuntu 12.04 today on an HP TouchSmart tm2-2050us and I'm observing the same problem.
jdsimmons@jacinth:~$ uname -a Linux jacinth 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:52:48 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
I just installed Ubuntu 12.04 today on an HP TouchSmart tm2-2050us and I'm observing the same problem.
jdsimmons@ jacinth: ~$ uname -a
Linux jacinth 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:52:48 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux