Hi!
>
> this preliminary patch should suspend your mouse, if it supports remote
> wakeup. In fact it should do this to all devices which are HID, claimed by
> the input layer and support remote wakeup.
>
> It works for me with my mouse. I've tested letting it autosuspend and
> resume. It survives going to a text console, init 3 and hotplugging.
> Anything else is untested. I think it'll crash and burn with PID devices.
> I am working on that.
>
> I am pretty sure that it actually goes to sleep taking the root hub with it.
> I'd be interested in knowing how much power it really saves. Short of
> running dry my laptop's battery I have no way of telling.
>
> You need to compile with EXPERIMENTAL & USB_SUSPEND.
> This is the corrected version.
Measurements on x60:
Idle machine, lowest backlight, no usb plugged in: 10813 mW
Feb 1 15:55:49 amd kernel: input<3>Added idle timer for firing in 10
seconds
Feb 1 15:55:49 amd kernel: : USB HID v1.10 Mouse [HID 062a:0000] on
usb-0000:00:1d.0-1
Feb 1 15:55:49 amd kernel: PM: Adding info for No Bus:usbdev2.2_ep81
Feb 1 15:55:59 amd kernel: state is 0
Feb 1 15:55:59 amd kernel: Modded idle timer for firing in 10 seconds
Feb 1 15:56:09 amd kernel: state is -1
Feb 1 15:56:09 amd kernel: Detected idleness
Feb 1 15:56:09 amd kernel: Putting idle interface.
Power consumption: 10860 mW
...so yes, it seems to work. (Measurement error is ~300mW)
When I actually use the mouse
Feb 1 15:58:14 amd kernel: Added idle timer for firing in 10 seconds
^[ Feb 1 15:58:24 amd kernel: state is 0
Feb 1 15:58:24 amd kernel: Modded idle timer for firing in 10 seconds
Feb 1 15:58:34 amd kernel: state is 0
...
Power consumption: 13918 mW
So yes, this is must-have for anyone using usb mouse on a notebook.
I do not even need to press buttons to wake the mouse up, good. (Maybe
it has something to do with mouse being wireless and powered by 2x
AA?)
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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