On Saturday 12 May 2007 19:51:26 Soeren Sonnenburg wrote: > Dear all, > > I've realized using the great powertop ( http://www.linuxpowertop.org/ ) > that loading the appletouch driver (and touching it once) makes consumes > about 0.3 W even when not touching the pad. As rmmod'ing appletouch > fixes this I wonder why the driver does not do this alone. So my > question is what does one have to do to convert a driver (such as > appletouch) to make use of usb autosuspend except for > > .supports_autosuspend = 1 > > ... > > While we are at it usb related powerhogs on this macbook pro are > uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func) > too...
I've found that hci_usb also hogs power on the Macbook; blacklisting this module cuts down HZ considerably. I also found appletouch consumed ticks, just as you did. uhci_hcd then drops to noise; my Macbook's sitting on 10W with the backlight on minimum, which is about what it can manage in OS X on maximum life settings. -- Cheers, Alistair. Final year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
