Comment 16 for bug 343371

Arrg! Same issue here coupled with the slow SATA performance bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/119730

Started happening for me with Hardy Heron about 1.5 years ago. Now running up-to-date Karmic with same issue.

Lenovo T61
1GB DDR2 667
500GB Seagate SATA2 ST9500420AS
2.6.31-16-generic SMP x86_64

As soon as my system swaps, the UI becomes unusable.
Trying other IO schedulers.