Comment 36 for bug 779753

T400 with the kworker freeze, especially noticeable after long period of input inactivity (!?) or returning from suspend (activated by lid closure).
running kernel 3.0.0-12-generic #20-Ubuntu SMP (LinuxMint 12)

followed suggested fix in post #26.

Seems to correct, at least shut lid for suspend and opened to find cursor is free-flowing. Will continue to watch ...

Can also report have identical setup on a T61 with no troubles at all with kworker slowdown.