Just to clarify: if you disable powernowd, you no longer see the hangs, is that correct?
** Changed in: Ubuntu Sourcepackagename: None => linux-source-2.6.15 -- System freeze with white screen https://launchpad.net/bugs/46470 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs