[Bug 453377] Re: [ubuntu karmic] mythtv-frontend does not prevent display being put to sleep during tv watching

[ullix]

Mario, I tried to find the answer to your question, but there seem to be
a few more oddities. Looks like gnome-screensaver has problems of its
own and in its interaction with mythtv.

I set the preferences in the gnome-power-manager 2.28.0 to (for battery and AC)
- put the computer to sleep when inactive for: 1h 
- put the display to sleep when inactive for: 1 min 

On battery: 
cold boot, then some cursor movement on the desktop before starting timing: nothing happened at 1min, but at 5min the display dimmed slowly to off. Via ssh from a second computer I killed gnome-screensaver, and the display came right back. Then, in intervals of 1 min, the screen switched to off in an quick change (I guess that slow-dimming is gnome-screensaver and quick-off is X power management?) Then I used mythtv-frontend to watch live tv, and it was still running fine at 8min. When stopping live-tv and looking at mythtv menues or other textual info,  then screen was switched quick-off in 1 min intervals.  

On AC:
same procedure as with battery: nothing happened at 1min, but slow dim off at 5min, and again, killing gnome-screensave via ssh brought the display back. But then it kept running beyond 8min. Not surprinsingly, live-tv via mythtv-frontend runs continuously.

On battery and AC:
from a cold boot with the gnome-screensaver running and mythtv showing live-tv: nothing happened at 1min, but mythtv crashed in 8 out of 9 attempts at 2-4 min. Once I was able to get mythtv runing to 5min, when the display dimmed off slowly. But then the display came back some 10 seconds later.

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[ubuntu karmic] mythtv-frontend does not prevent display being put to sleep during tv watching
https://bugs.launchpad.net/bugs/453377
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