I've managed to get OS X 10.6.x and Lubuntu 12.04 dual booting on Mom's old iMac5,1...but I have absolutely no fan activity.

I've spent a couple of hours searching for a solution, but nothing I've tried works yet.

Can anyone point me to a thread with a solution? I'd greatly appreciate it--I think Lubuntu will be blazingly fast on this system--I'd just like some cooling ability!

Thanks in advance!