My external keyboard does not have a suspend button. Is there any 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.
If you run the following command you will see a list of usb devices and if they are enabled to wake up the system.
You will see a list of items such as the the one seen below.
Once you have established which device is the keyboard lets say USB0 run this command.
Now if you run the command from the start again you should see enabled next to the device.
That worked for me, I can wake up my dektop with any key.