Ah nevermind. On a stock Edgy install, this seems to have solved the problems:
# As root, type: apt-get install powernowd cd /lib/modules/$(uname -r)/kernel/drivers/macintosh ls | cut -d. -f1 | xargs -n1 modprobe Seems that what's missing in Edgy is the correct knowledge to load the right modules. ** Changed in: linux-source-2.6.17 (Ubuntu) Status: Confirmed => In Progress -- iMac G5 Thermal Fan Support https://launchpad.net/bugs/34723 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs