Fan resume not working on nx6325 without userland assistance

["Rafael J. Wysocki" <rjw@sisk.pl>]

Hi,

It turns out that the following script (from openSUSE 10.3):

#############################################################
# triggers the ACPI fan(s) after resume. Since ACPI drivers
# have no suspend support, this is sometimes necessary.
# see http://article.gmane.org/gmane.linux.acpi.devel/16643
kick-fan()
{
        local FAN DUMMY STATE
        for FAN in /proc/acpi/fan/*/state; do
                [ ! -e $FAN ] && continue
                read DUMMY STATE < $FAN
                if [ "$STATE" = "on" ]; then
                        echo "kicking $FAN"
                        echo -n 3 > $FAN
                        echo -n 0 > $FAN
                fi
        done
}

case $1 in
        thaw|resume)
                kick-fan
                ;;
esac

is necessary to make the fan behave appropriately after a resume from RAM
(I haven't checked resume from hibernation, but I guess the same thing happens)
on HP nx6325 with 2.6.24-rc8 (and with previous kernels probably too).

It wasn't needed at one point, so something has regressed.  Sigh.

Greetings,
Rafael