[Note: Noticed a similar question but it never received a response.]
I am using
archlinux. I have setup DPMS to suspend my display after 2 minutes of inactivity (
xset dpms 0 120 180). However, I've noticed that it doesn't always kick in automatically. I don't think it's a hardware issue as performing an
xset dpms force works without a problem.
$ xset q Keyboard Control: auto repeat: on key click percent: 0 LED mask: 00000000 XKB indicators: 00: Caps Lock: off 01: Num Lock: off 02: Scroll Lock: off 03: Compose: off 04: Kana: off 05: Sleep: off 06: Suspend: off 07: Mute: off 08: Misc: off 09: Mail: off 10: Charging: off 11: Shift Lock: off 12: Group 2: off 13: Mouse Keys: off auto repeat delay: 660 repeat rate: 25 auto repeating keys: 00ffffffdffffbbf fadfffefffedffff 9fffffffffffffff fff7ffffffffffff bell percent: 50 bell pitch: 400 bell duration: 100 Pointer Control: acceleration: 2/1 threshold: 4 Screen Saver: prefer blanking: yes allow exposures: yes timeout: 0 cycle: 600 Colors: default colormap: 0x22 BlackPixel: 0x0 WhitePixel: 0xffffff Font Path: /usr/share/fonts/TTF/,/usr/share/fonts/OTF/,built-ins DPMS (Energy Star): Standby: 0 Suspend: 120 Off: 180 DPMS is Enabled Monitor is On
How can I determine what is preventing my display from suspending as per the DPMS settings?