Comment 41 for bug 35455

Ok, well it seems that I was actually wrong. The update changes the fan's behaviour a lot, so I thought the fans would come up again, but actually they still do not as they should. However, I found out that only those fans do not response after suspend to RAM or disk (I experienced the same problem with both methods), which had been switched on when the system suspends. Thus, the following fix now eventually really seems to work:

I added the following script to /etc/acpi/suspend.d:
File 85-fan-stop.sh
<-->
#!/bin/sh

modprobe -r thermal

for x in /proc/acpi/fan/*; do
    if [ "`grep on $x/state`" ]; then
        echo -n 3 > $x/state;
    fi
done
<-->

This simply stops all fans before the system is suspended. This may make the system run a little bit hot when using suspend to disk, since writing all the pages to disk may take some time and the fans are turned off then. However it works very well for suspend to RAM.

I also modified /etc/acpi/resume.d/72-acpi-pain.sh, but did not test yet, if this modification is really necessary. I just commented out the "modprobe -r thermal", "modprobe -r fan" and "modprobe fan" lines as well the "NNGH FAN HATE" part.