OK -- so I spent some time with this machine tonight... It seems that
the real problem is just the first screen-saver / idle time. So - here
is a repeatable sequence:
1) After a clean shutdown, power on the machine and let Ubuntu boot;
2) Login as a user;
3) leave the display idle (my machine is set, as noted above, screen saver 3
minutes, power off monitor after 5 minutes)
The screen saver will blank the screen, but the power manager will not turn
off the monitor
4) move the mouse and the screen activity brings the display back
5) leave the display idle and both the screen saver and the power manager work
as they should...
Tom
--
power management does not consistently power down inactive monitor
https://bugs.launchpad.net/bugs/473705
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