Hello:

On 7 Nov 2025 at 23:42, Ralph Ronnquist wrote:

> > Moving the mouse brings them back on ...
> ... turning off the display after 10 minutes ...
> ... display management feature in Xorg,
> ... tune with the "xset" command.
I see.

> use "xset q" (in a terminal) to see the Xorg display settings.
This is what I get with "xset q":

[code]
$ xset q
Keyboard Control:
  auto repeat:  on    key click percent:  0    LED mask:  00000002
  XKB indicators:
    00: Caps Lock: off    01: Num Lock: on     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: 350    repeat rate: 50
  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:  600    cycle:  600

Colors:
  default colormap: 0x20    BlackPixel: 0x0    WhitePixel: 0xffffff

Font Path:
/usr/share/fonts/X11/misc,/usr/share/fonts/X11/cyrillic,/usr/share/fon
ts/X11/100dpi/:unscaled,/usr/share/fonts/X11/75dpi/:unscaled,/usr/shar
e/fonts/X11/Type1,/usr/share/fonts/X11/100dpi,/usr/share/fonts/X11/75d
pi,built-ins

DPMS (Energy Star):
Server does not have the DPMS Extension
$
[/code]

Right ...
There it is:

[code]
----
Screen Saver:
  prefer blanking: yes    allow exposures: yes
  timeout: 600    cycle: 600
----
[/code]

> ... turn off its "Screen Saver" and "DPMS" with "xset -dpms s off"
I did that when I long ago when I played around with [xorg.conf]
while attempting to get rid of the PM settings, among other X11
related things.

[code]
$ cat /etc/X11/xorg.conf | grep -i dpms
    Option      "DPMS" "0"
    Option      "DPMS" "0"
    Option      "DPMS" "0"
#   Option      "DPMS" "0"    # <- this is for an uninstalled fourth monitor.
$ 
[/code]

Maybe ["DPMS" "0"] does not override the [Screen Saver] setting?

Thanks for your input.
As always, much appreciated.

Best,

A.