[Bug 39315] Re: Keyboard random repeat

[Lorenzo J. Lucchini]

A command such as "sudo echo mem >/sys/power/state" causes the command "sudo echo mem" to be executed, and its output redirected to /sys/power/state.
If you read the above carefully, you'll realize that the redirection does *not* happen as root: "echo mem" is executed as root, because sudo does that, but the redirection is done by the shell.

You probably want something like
 sudo -c sh "echo mem >/sys/power/state"

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Keyboard random repeat 
https://launchpad.net/bugs/39315