I have a newly built Wheezy 7.5 machine that I wanted to wake from S3
suspend using either a USB keyboard or mouse. This doesn't happen by
default, and after researching this topic a bit online, I was unable to
find a low complexity method for making it possible. Following some
study, I devised the following udev rule for enabling the wakeup
capability of any attached USB HID device.
Or at least any directly attached USB HID device. It turns out that the
"enabled" string has to be present both in the power/wakeup file
associated with the actual device(s) and in the analogous file
associated with the host controller. Adding intervening hubs would
presumably complicate matters.
The udev rule is pasted below. I'm still learning how to use the mailing
list so this is a duplicate of a previously mis-threaded submission. I
apologize.
------- /etc/udev/rules.d/90-persistent-usb.rules--------
ACTION=="add", SUBSYSTEM=="usb", DRIVER=="usbhid", RUN+="/bin/sh -c
'echo enabled > /sys$env{DEVPATH}/../../power/wakeup'", RUN+="/bin/sh -c
'echo enabled > /sys$env{DEVPATH}/../power/wakeup'"
