Arch Linux

nonoitall

Member

Registered: 2010-04-20

Posts: 6

[Solved] System won't wake up from a USB remote

I just started running Arch on our media center PC a week or two ago, and everything is running perfectly aside from it's inability to wake up from standby when the power button on the USB remote is pressed.  Previously I had Ubuntu (Lucid) installed on this machine, and as long as I enabled waking up on the USB device (echo USB0 > /proc/acpi/wakeup) it would work fine.  I've done that with Arch, but waking up via the remote does not work.  What can I try to get this working right?  (If it helps, this is a ASRock ion 330 (specs here) with a Hauppauge USB MCE remote (see here), and I'm running up-to-date x86_64 Arch on it.)  Thanks in advance!

EDIT:  And before anyone asks, the batteries in the remote are good.

Last edited by nonoitall (2011-01-09 02:37:58)

nonoitall

Member

Registered: 2010-04-20

Posts: 6

Re: [Solved] System won't wake up from a USB remote

Well I did some digging and managed to find a solution to my problem.  I couldn't find the correct file to echo 'enabled' to manually, but like in that post, I created a udev rule using the device's vendor/product IDs (retrieved via lsusb) and after a reboot, the device wakeup file (whose location I'm still blissfully unaware of) gets set up automagically.  Once that was done, I was able to resume from standby using the remote.

Just to reiterate the procedure for those who can't be bothered to click a link:

First, list the USB devices on your system:

$ lsusb

Each listed USB device will have a four-hex-digit vendor ID and a four-hex-digit product ID, in that order, separated by a colon.  Find the device on the list that you need to enable waking from and note its vendor ID and product ID.  Then create a new udev rule in /etc/udev/rules.d/ (mine was named 90-usbremote.rules) with the following contents (insert your own IDs at the XXXX's):

SUBSYSTEM=="usb", ATTRS{idVendor}=="XXXX", ATTRS{idProduct}=="XXXX" RUN+="/bin/sh -c 'echo enabled > /sys$env{DEVPATH}/../power/wakeup'"

Then reboot.  (At least, I assume one would have to reboot for this rule to take effect; I didn't bother checking otherwise.)  I kept the echo USB0 > /proc/acpi/wakeup command in my /etc/rc.local file, though I'm not sure if that's necessary anymore with the udev rule in place.  (Will experiment with that tomorrow.)  I also imagine that one could omit the two ATTRS from the above rule to enable waking on all USB devices, though this may not be a desirable thing for some people.  (And I might be wrong since udev rules and their syntax are not something I'm all that familiar with.)  Anyway, hopefully this may be of assistance if someone else is having trouble.