I recall I had a heck of a time in the past with the older kde, in keeping the monitors/screensaver set so it might show a few minutes of the screensaver of choice, and to powerdown the monitor after a few minutes of screen saver. But it can't remember those settings more than a week or so, so I just put a couple entries in my crontab:
*/1 * * * * * xset +dpms */1 * * * * * xset dpms 300 0 600
To see if refreshing its memory hourly will effect a fix.
But it sure would be nice if we didn't have to overpower it like that to keep it working.
In TDE control center, its set 5,0,10 but that seems not to affect it, when it has failed the pheripherals/display/screensaver and display power management are all zeroed out or the checkboxes cleared. It appears is as if a zmalloc has gone astray? Under appearance/screensaver its set to start a slide show after 4 minutes. The memory of whatever it uses for the "elevator music for the eyeball" also seems transient, it switches to either a blank screen or some glx thing that burns up the cpu, again at random intervals that do not seem to correlate with the dpms settings failures.
Info, bug action, your pick. ;-)
Cheers, Gene Heskett