Ok, a simple experiment doesn't seem to confirm this bug "exactly".
1) I set up the "put display to sleep when inactive" to 1 minute.
2) Leave the desktop idle with the programs (I'm using) open (firefox, pidgin, hgtk, gnome-terminal, etc): it takes 3:34min to turn off display.
3) Leave a cpu-intensive task running ("make clean; make" a project) and repeat step 2: it takes 3:47min to turn off display. (task took about 1:30min to complete)
Ok, a simple experiment doesn't seem to confirm this bug "exactly".
1) I set up the "put display to sleep when inactive" to 1 minute.
2) Leave the desktop idle with the programs (I'm using) open (firefox, pidgin, hgtk, gnome-terminal, etc): it takes 3:34min to turn off display.
3) Leave a cpu-intensive task running ("make clean; make" a project) and repeat step 2: it takes 3:47min to turn off display. (task took about 1:30min to complete)