On an installed system, with both the aforementioned settings disabled (as well as Screensaver -> Lock Screen (tab) -> Enable Lock Screen), the display still blanks (black screen) but does not power down. "xset -q" run on the system via ssh shows "DPMS is Disabled".
On an installed system, with both the aforementioned settings disabled (as well as Screensaver -> Lock Screen (tab) -> Enable Lock Screen), the display still blanks (black screen) but does not power down. "xset -q" run on the system via ssh shows "DPMS is Disabled".