Monitors not sleeping

Monitors not sleeping

Postby rfemali » Jul 28th, '25, 03:51

I am running Mageia 9. I have a mother board (Asus Proart Z790) that only had a single HDMI out so I am utilizing a USB-C port for my second display. When the monitors try to go to sleep, I will see the no input message then both go black but trun right back on. I have not been able to get them to stay asleep and any help would be most appreciated. Thanks.
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Re: Monitors not sleeping

Postby doktor5000 » Jul 28th, '25, 16:25

Hi there, your description seems to miss a few details.
So you have your first screen attached via HDMI, and your second screen via USB-C?
Also do you use integrated graphics or a dedicated graphic card ?

rfemali wrote:When the monitors try to go to sleep, I will see the no input message then both go black but trun right back on.

What's the event when the monitors should go to sleep? After like 15 minutes of idle time, or when your computer goes to standby/hibernate or when ?
Also this does happen for both monitors ?

Please post the output of

Code: Select all
xset -q
lspcidrake -v | grep VGA


Also have a look at
https://unix.stackexchange.com/question ... -my-screen
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Re: Monitors not sleeping

Postby rfemali » Jul 31st, '25, 04:13

doktor5000,

Yes, one monitor on an HDMI cable and the other on USB-C to HDMI cable.

I checked the link and turning off my mouse had no affect and I do not have an auto setting on my monitors for input. Additionally, this is all the same hardware I had on my last mobo and this issue was not present.

When the monitors try to sleep they will go blue and say no input signal, then go black, and then after a couple seconds they will turn back on.

I am using the integrated graphics.

The output of xset -q was:

Code: Select all
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:  600    repeat rate:  25
  auto repeating keys:  00ffffffdffffbbf
                        fadfffefffedffff
                        dfffffffffffffff
                        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:  0x20    BlackPixel:  0x0    WhitePixel:  0xffffff
Font Path:
  catalogue:/etc/X11/fontpath.d,built-ins
DPMS (Display Power Management Signaling):
  Standby: 0    Suspend: 0    Off: 0
  DPMS is Enabled
  Monitor is On


Output of lspcidrak -v | grep VGA was:

Code: Select all
Card:Intel Kernel Mode setting (Xorg modesetting): Intel Corporation|Raptor Lake-S GT1 [UHD Graphics 770] [DISPLAY_VGA] (vendor:8086 device:a780 subv:1043 subd:8882) (rev: 04)



added code tags. ~Germ
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Re: Monitors not sleeping

Postby doktor5000 » Jul 31st, '25, 17:28

One bit is still missing:
doktor5000 wrote:What's the event when the monitors should go to sleep? After like 15 minutes of idle time, or when your computer goes to standby/hibernate or when ?


Also from the link, the main point was to try to disable DPMS (xset dpms force off) and also
to configure the input source for the monitors to what their actual input should be, not to automatic.
Cauldron is not for the faint of heart!
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