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Turn displays off without suspend/hibernate.

asked 2017-04-17 06:58:08 -0500

artdvla gravatar image

Without suspending or hibernating (neither of which work on my laptop; quite frankly, i'm resigned at ever trying to get them to work), I need to be able to shut off my screens in order to save power and the displays' life.

Hitting Super + L locks the screen and they (Laptop + Externals) all turn black. However, the backlights remain lit. How can I get the displays to turnoff while the computer remains running (e.g., still allowing me to ssh in and maintaining everything in memory).

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answered 2017-04-17 13:37:59 -0500

Rabin gravatar image

With MATE desktop and under X I use xset for that, type:

xset dpms 3600 3600 3600

this will enable Display Power Management and will set the time out to 3600 sec (1 hour)

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That did it. Very easy. Thank you.

artdvla gravatar imageartdvla ( 2017-04-18 10:32:04 -0500 )edit

This should happen automatically. You should file a bug against your desktop environment.

genodeftest gravatar imagegenodeftest ( 2017-04-20 15:23:07 -0500 )edit
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answered 2017-04-17 10:36:07 -0500

genodeftest gravatar image
  1. Do you have updates installed? Has this issue started showing recently or has it been present for a longer time?

  2. You might want to look at https://01.org/blogs/rzhang/2015/best... for the suspend/hibernate issues

  3. Regarding the backlight issue, please have a look at https://wiki.archlinux.org/index.php/... and check whether the backlight is detected correctly at all (section "ACPI") and if yes, may be the last section is of help to you.

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answered 2017-04-19 10:06:57 -0500

sixpack13 gravatar image

cit: "Without suspending or hibernating (neither of which work on my laptop; quite frankly, i'm resigned at ever trying to get them to work) ..."

is your swap partition in your /etc/default/grub ? like this:

GRUB_CMDLINE_LINUX=" resume=/dev/sdXN rhgb quiet"

afterwards you need (only one):

sudo /sbin/grub2-mkconfig -o /boot/grub2/grub.cfg  
sudo /sbin/grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg
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answered 2017-04-17 07:50:37 -0500

lsatenstein gravatar image

For a black screen, I visit System-┬╗Power and set the timeout there to the miinmum, which is 1 minute. Screen blanks after 1 minute of no activity.

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Asked: 2017-04-17 06:58:08 -0500

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Last updated: Apr 19 '17