Hi,
As a MacBook Pro owner, I use the appletouch driver for the stock trackpad.
Until recently, this driver produced a lot (about 200) CPU wakeup/sec at any time (thanks to powertop for pointing that out). This behaviour has been fixed by a simple patch written by Matthew Garret and Soeren Sonnenburg in linux-2.6.23-rc1 ( see http://groups.google.fr/group/fa.linux.kernel/browse_thread/thread/d9d72416af5c6817/7b309dfbdbc5c3a0#7b309dfbdbc5c3a0 for the lkml discussion). Now appletouch create IRQ only when the trackpad is touched, allowing for a longer battery life.
It would be great if the kernel in Ubuntu Gutsy would include this patch.
I'll attach the patch below (taken directly by diffing the vanilla linux-2.6 git driver and the current ubuntu-gutsy git tree).
I read https://wiki.ubuntu.com/KernelPatches. I hope you will accept this patch
- It comes directly from upstream,
- It has been tested by kernel developpers, and has been in the mactel-linux svn repository for some weeks (used by most of the Apple MacBook (Pro) owners, including myself),
- No issues have been reported,
- It affects only 1 file (drivers/input/mouse/appletouch.c)
- It affects only the users of the appletouch driver (Apple MacBook (Pro) only),
- Waiting gutsy+1 in about 10 month to have this patch without having to manually managing the kernel is not an option.
Regards,
Gutsy commit 02e9f6b857029ef