Comment 25 for bug 75174

Brett Alton wrote:

> This still effects my HP Pavillion 503n and a200n using Ubuntu 8.04.4.
> 'kacpid' and 'kacpi_notify' need to be killed using 'sudo killall' while
> grub needs to load the kernel with the 'acpi=off' and 'apm=off' flags.

In my case, this turned out to be a motherboard bios bug:

After harrassing the motherboard manufacturer we got a bios update
that fixed this issue.

Erik de Castro Lopo