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:

    http://bugzilla.kernel.org/show_bug.cgi?id=12620

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

HTH,
Erik
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Erik de Castro Lopo
http://www.mega-nerd.com/