to igor_mk:
Have you tried disabling DPMS power management from the kde system settings? It seemed to do the job for me.
In 8.04 if I have DPMS (in kde sys settings) blanked out screen looks like theres one of the backlights is broken (which isn't the case), turning off the DPMS makes the screen turn off once in a while, haven't yet found a way to configure it though.
This could be a bug that kde system settings toggles the "xset dpms" somehow.. Too bad there doesn't seem to be an easy way to check this as "xset dpms" does not return anything.
to igor_mk:
Have you tried disabling DPMS power management from the kde system settings? It seemed to do the job for me.
In 8.04 if I have DPMS (in kde sys settings) blanked out screen looks like theres one of the backlights is broken (which isn't the case), turning off the DPMS makes the screen turn off once in a while, haven't yet found a way to configure it though.
This could be a bug that kde system settings toggles the "xset dpms" somehow.. Too bad there doesn't seem to be an easy way to check this as "xset dpms" does not return anything.