[ltp] X60s USB Bus unbind for more C states..

[Florian Reitmeir]

Hi,

like i've written before, on my X60s there is the internal USB bus which
forces the CPU1 to C1/C2.. and there is only bluetooth and the fingerprint
reader connected.

to disable it (and get much powersaving) use:

modprobe uhci_hcd
modprobe ehci_hcd

cd /sys/bus/pci/drivers/uhci_hcd
# unbind the driver from the pci device, just
# use lspci to find one..
# on my thinkpad its USB Bus5
echo -n "0000:00:1d.3" >unbind 

acpitool -c will show you the nice effect..

-- 
Florian Reitmeir