HP Pavillion ze4145 laptop, Ubuntu Dapper pre-release:

* Detecting and activating hardware...
[17179677.140000] ali15x3_smbus 0000:00:11.0: ALI15X3_smb region uninitialized - upgrade BIOS or use force_addr=0xaddr
[17179677.140000] ali15x3_smbus 0000:00:11.0: ALI15X3 not detected, module not inserted.
[17179679.232000] AC'97 1 access is not valid [0xffffffff], removing mixer.
[17179679.232000] ali mixer 1 creating error.
^[[M[17179690.196000] BUG: soft lockup detected on CPU#0!

(hard lock.. have to power off, ctrl+alt+delete won't work)