ASUI was originally launched through sudo so I know how to do it. The advanced-systemui binary can't be run from sudo because some of the services won't start. I think there was some other problems as well. Can't you just type root to become root and then run asui, same number of keystrokes and the 'oo' makes it easier to type?

It will work on stock Diablo without rotation support or on Community SSU or Diablo Turbo. Is ASUI running ps aux|grep advan? If so, run asui dd ; asui k ; asui rd as root, press the hardware power button, press the statusbar applet, ctrl-C to kill it in the console and send me the /root/asui-XXXXXXX log file. If it is not running then use the same commands and the log file should show why it isn't starting.

Is your dim timeout 2 minutes? The dim timeout begins when you press the lock button but won't dim until at least 60 seconds after the last blanking pause signal. I could probably read the dim timeout and adjust the message if greater than 60 seconds.

Lock&blank and blank will not override the blanking pause either and result in the same notification.

Wouldn't a long press on the power button shutdown your device?

What is your timeout from dim to blank? Power button will dim the screen if another key is required to unlock, but if your dim->blank timeout was near zero it might cause problems.

If the screen is off and locked then power button requires another key to unlock or none if you prefer the old way, you can change it in the settings. If the screen is locked and has dimmed then power button will blank the screen. It is important that is has dimmed because MCE will dim it after power button has blanked the screen causing it to turn back on.