Binary package hint: acpi
On my Vaio SR17 laptop, when I run a CPU-intensive process (like compiling a large program), eventually kacpi_notify always begins to take 85% or more of the machine's CPU. I can't kill kacpi, even with -9, and I can't even shut down gracefully: the machine gets through most of the shutdown sequence and then sits there with the CPU still spinning, and I have to pull the power plug.
This machine worked fine under Breezy. Please, is there any way I can disable kacpid, or control its function? I don't think it's doing anything I need (CPU speeds and the CPU fan are controlled in BIOS on this machine). Google finds tons of people having similar problems, but nobody seems to know a fix. I don't want to disable acpi entirely since ubuntu's excellent acpi suspend/hibernate support (in breezy, anyway) is the biggest reason I prefer ubuntu on this laptop.