My CPU fan doesn't move in FC6, I have an Emachines T2792. The motherboard is still defaulted to factory. I am very new to linux and I really want to switch over, particularly to my new laptop, but I don't want to have to worry about the fans. I had this problem as well with ubuntu which I tried on this desktop. Can someone please help me fix this? Thanks.

It shouldn't have anything to do with linux. Does it work in bios? Does it run in windows?

It runs in bios and windows, just stops suddenly when linux begins booting.

Lets see if acpi sees it.
Is there a file under /proc/acpi/fan?
If so what is it?
My notebook does not see the fan but I believe it is called state.
Is it /proc/acpi/fan/state?
If so as root run the command ' echo 1 > /proc/acpi/fan/state '. Does the fan come on?
Then ' echo 0 > /proc/acpi/fan/state ' to turn off.

If nothing in state then not sure where to go from here.

Brian

I see an error when Fedora Starts about the fan, but I can't seem to see it long enough to write it down. I'll see if I can get it. Also, proc doesn't bring anything up.

Here's the error:

FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.18-1.2798.fc6/kernel/arch/i386/cpu/cpufreq/acpi-cpufreq.ko): No such device

That is a celeron 2.7 with a imperial motherboard, I think.
You could try and add this to the end of the kernel line in /boot/grub/menu.lst or /boot/grub/grub.conf
(not sure about fedora)
pci=noacpi acpi=off

Added that line but it still gives me the error and the fan doesn't run

If i may interrupt, try updating the kernel first. Its a long shot but its possible you get rid of that fatal message.

If not seen by proc then my only conclusion is get an adapter to connect the fan directly to power supply so as to run all the time. Maybe there are other fan plugs on the board that the fan can plug into that allows the fan to run all the time. Also there are devices that can detect tempeture and turn fans speed them up or slow them down as needed.

I am assuming the fan is the one on the cpu?
Or this some other fan you are talking about. Like one that moves air through the case or power supply. If the later then they may be properitory controlled by the motherboard from properitory software.

Brian

Something like this;
http://cgi.ebay.com/Fan-Power-Adapto...QQcmdZViewItem

Is it possible to switch acpi off in bios or change something there so that the fan always run regardless of operating system?

Use of noacpi as described in post #6 will disable the kernel acpi on that boot. Then it should use APM. Usually both APM and ACPI are compiled in the kernel in most distros I have seen.

Brian

Thanks for the help, my friend just told me that I had put the acpi=off line into the comments, I changed it and now it runs fine. Sorry for that.