My external keyboard does not have a suspend button. Is there a way I can set up Ubuntu to use a different key (or any key for that matter) to wake the PC if it has been suspended?
1 Answer
If you run the following command, you will see a list of USB devices and if they are enabled to wake up the system.
cat /proc/acpi/wakeup
You will see a list of items such as the the one seen below.
USB0 S3 *disabled pci:0000:00:12.0
Once you have established which device is the keyboard, let’s say USB0, run this command.
sudo su
echo USB0 > /proc/acpi/wakeup
Now, if you run the command from the start again, you should see enabled next to the device.
USB0 S3 *enabled pci:0000:00:12.0
That worked for me, and I can wake up my desktop with any key.
Details on the wakeup codes for devices can be found here (link courtesy of Santhana Krishnan).
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It worked like a charm - Thank you very much. My USB keyboard was called UAR1, so I suppose chances are good that USB devices always start with a 'U', but the rest can be anything.– JackOct 23, 2012 at 20:03
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7How do I establish which device is the keyboard? If I try "lsusb" I get a list of devices, but they have different IDs. There's no "USB0" or anything like the /proc/acpi/wakeup lists as device IDs. Dec 21, 2015 at 10:25