Powerbook G4 doesn't wake up

Steven Fisher wrote on :
My Powerbook G4 doesn't wake up if I connect an external monitor to it when it is asleep since the 10.1.2 update. Anyone else having this problem?
stan replied on :

Steven Fisher sdfisher@redacted.invalid wrote:

My Powerbook G4 doesn't wake up if I connect an external monitor to it when it is asleep since the 10.1.2 update. Anyone else having this problem?

I have the same problem with my G4 Cube and Mac OS X 10.1.2, but the same behavior happened prior to my upgrading the OS from 10.1. Fortunately, this does not happen often, but when it does, it seems my only recourse is to power off the Mac and start it up again. I do not know what the cause is.