Public bug reported:
Using Kubuntu Netbook remix on an AAO 110. All updates as of 16.08.2009.
Acerhdf works well and diligently starts on every boot after being added
to /etc/modules, however it will not take effect since fan control is
disabled by default in /sys/class/thermal/thermal_zone0/mode.
To make fan control and acerhdf work, I need to do a 'sudo -s' (regular
sudo won't work) and then 'echo -n "enabled" > /sys
/class/thermal/thermal_zone0/mode' (this command is recommended when
doing "dmesg | grep acerhdf".
However /sys/class/thermal/thermal_zone0/mode is reset to "disabled"
after every reboot or shutdown. To make enebled permanent I had to add
'echo -n "enabled" > /sys /class/thermal/thermal_zone0/mode' to
/etc/rc.local (before the "exit 0"-line).
I've tried this with acerhdf 0.5.13 up to 0.5.17 (which I currently use)
and kernels 2.6.31-5 and 2.6.31-6. Smae problem, same fix/workaround.
Concerning enabling fan control I consider this a fix, however I doubt
that the line should be added to /etc/rc.conf. Rather
/sys/class/thermal/thermal_zone0/mode should remember the changes (I
guess).
I have not had similar problems on this machine running Jaunty UNR and
KDE 4.3 (from backports). There acerhdf only needed to be added to
/etc/modules to have it work after a reboot or shutdown.
** Affects: ubuntu
Importance: Undecided
Status: New
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[KDM] Acerhdf not working due to fan control being disabled (with
fix/workaround)
https://bugs.launchpad.net/bugs/414882
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