Re: Fan resume not working on nx6325 without userland assistance

[Alexey Starikovskiy <astarikovskiy@suse.de>]

Does revert of 93ad7c07ad487b036add8760dabcc35666a550ef helps?



Rafael J. Wysocki wrote:
> On Tuesday, 22 of January 2008, Rafael J. Wysocki wrote:
>> 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.
> 
> Ah, I didn't say that thermal management is completely busted after a resume
> if the fan is not kicked from the user land (using the above script).  Usually
> the fan is 100% on (that corresponds to all ACPI "fans" being on), but once it
> had gone off and I was unable to turn it on by any means (including rising the
> temperature to a dangerous level).
> 
> Greetings,
> Rafael