To whom it may concern:
It took so long for me to find out kernel boot parameter(s) on my laptop. And I could not find any nice place to look for.
Here, I post my system, symptoms and parameter(s).
Toshiba Satellite A100-ST2311, Debian (sarge etch) kernel 2.6.15 -> 23. Problem is random USB lockup. Following parameters solved the situation. "noapic pci=noacpi" noapic alone took care of USB issue, but wireless dies.
Hope this helps somebody.
If anybody has trouble with HP Pavilion DV9225US laptop, this page may help. http://www.stearns.org/doc/hp-dv9225us-fedora-6.html
P.S. Can everybody add info here? So that many penguins will spend less time in future.