How to stop screen going black after 10 min

Question

My OS is Lubuntu 13.04. After 10 mins of inactivity the screen goes black. What I did to stop it without effect:

uninstalled xscreensaver completely
in power setting I set to never blank the screen
run some command found in the internet with "xset" which was said to solve it (but maybe it was wrong command, if you know proper please write it)

And still nothing. I don't know why lubuntu wants so hard to keep going black when watching films. For example on kubuntu/ubuntu I just set in power settings to never go black and it works. Maybe lubuntu uses customized kernel with hard-coded extreme energy savings that can't be turned off?

See my solution here:
http://askubuntu.com/questions/351849/screen-fade-to-black-after-10-minutes-and-never-come-back/ — Magno C, Oct 09 '13 at 18:38
I can confirm this behaviour for Ubuntu 14.04 after Upgrade from 13.04. The trick by TenPlus1 is working for me. — , Apr 24 '14 at 09:44
Installing xfce4 to avoid turning the screen black? That's ridiculous. You could try at least this simple script before insalling a complete desktop manager just for the screensaver (which turns on when you don't use the computer): http://ubuntuforums.org/showthread.php?t=2251377&highlight= — David Vartanian, Feb 17 '15 at 15:42

score 19 · Answer 1 · answered Aug 22 '14 at 20:32

19

In Lubuntu it is an option in preferences called "Light Lock". It's annoyingly on by default.

answered Aug 22 '14 at 20:32

Mark

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3

I believe this is the correct answer. But I recommend expanding this to explain exactly where to find that, perhaps even with a screenshot. – Eliah Kagan Aug 22 '14 at 22:07
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This is the correct answer for sure. I've found this in Main menu button (on panel)-> Preferences >> Light Locker Settings – Ivan Fateev Mar 15 '15 at 19:31

score 18 · Accepted Answer · edited Feb 13 '14 at 02:27

18

Try installing :

sudo apt-get install xfce4-power-manager

then configure it in:

xfce4-power-manager-settings

edited Feb 13 '14 at 02:27

Braiam

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answered Feb 13 '14 at 00:39

Arturo Veras

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Why you think he should install xfce4-power-manager? – Braiam Feb 13 '14 at 02:28
it works for me. Easy and simple solution. – Arturo Veras Feb 13 '14 at 02:35
On ubuntu 14.04 this doesn't work – Ghita Jan 02 '15 at 18:27

score 9 · Answer 3 · edited Sep 29 '13 at 18:14

9

For a temporary fix pop into terminal and type:

xset s 0 0

and this should stop the 10 minute blanking problem, to make it more permanent, insert a line with the same command at the start of the /home/username/.profile file.

edited Sep 29 '13 at 18:14

jobin

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answered May 05 '13 at 19:52

TenPlus1

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why is it temporary solution? Is it like running this command disables the blanking only for current session? – user1873947 May 05 '13 at 21:42
Or xset s off – qed Nov 09 '13 at 19:54
3

You can always disable Energy Star features: xset -dpms – swietyy Oct 01 '14 at 21:04

score 3 · Answer 4 · answered Dec 23 '14 at 07:12

3

Helps for me after reboot. In /etc/X11/xorg.conf (if you not have it just create):

Section "Monitor"
    Identifier "eDP0" <<< or LVDS0 or VGA0 or ...
    Option "DPMS" "false"
EndSection

Section "ServerLayout"
    Identifier "ServerLayout0"
    Option "StandbyTime" "0"
    Option "SuspendTime" "0"
    Option "OffTime" "0"
EndSection

answered Dec 23 '14 at 07:12

Anonymous1

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the only one that worked for me after updating my 14.04. thx. – smertrios Jul 27 '15 at 21:57

score 1 · Answer 5 · edited Jan 22 '16 at 07:37

1

In Ubuntu Mate 15.10 x64, I had the same issue. In the upper corner of Mate, Go to System > Administration, then to LightDM GTK+ Greeter Settings and enter your password. In the next window, click upper right on Misc., there you will find Timeout Until The Screen Blanks and it will be set at 1 Minute by default. Just move the slider to the left to Never. This may also be the case in Lubuntu, but it was definitely the issue in Mate 15.10.

edited Jan 22 '16 at 07:37

cat

1,672

answered Jan 21 '16 at 20:52

Cominatyalive

19

LightDM GTK+ Greeter Settings has been renamed to Login in Mate > 18.04, and unfortunately the screen blanking setting no longer exists – Windigo May 11 '20 at 18:19

score 1 · Answer 6 · answered Jan 07 '18 at 23:46

Lubuntu 16.04 LTS. I tried following the instructions from Arturo Veras by installing xfce4-power-manager. When I tried, it said it was already the latest version so I ran it. It's the same as going through the menu:

Lubuntu | Preferences | Power Manager

I tried it before finding Arturo's information, but apparently, I didn't do something right. This time, I set the following settings under "Plugged In"

Blank After: Never Put to sleep after: Never Switch off after: Never On inactivity reduce to : 80% Reduce after: Never (But, I may change this one.)

I went to supper, ate, cleaned dishes, made smoothies and sat down to write this and it still hasn't gone blank. :)

In the Lubuntu 16.04 LTS install from the live flash drive, Xfce Power Manager was automatically installed so I didn't need to do the command line.

I hope this will be helpful to the next GUI minded user.

score 0 · Answer 7 · answered Apr 02 '18 at 06:07

There is an app caffeine to manage display switching off (and screensaver).

sudo apt-get install caffeine

After installation you need to run a command caffeine-indicator. Then you will have an icon in tray. Click it and select Activate in popup menu to prevent display to switch off. If then you would like to allow display to switch off again you should click on caffeine tray icon and select Deactivate in menu.

score 0 · Answer 8 · answered Apr 21 '20 at 19:15

0

Lubuntu 18.04 LTS: Menu > Preferences > Power Manager > Display tab

hat tip: https://ubuntuforums.org/showthread.php?t=2434603

answered Apr 21 '20 at 19:15

dave_k_smith

101

score 0 · Answer 9 · edited Jan 10 '16 at 12:27

I believe I've found a solution to this problem. I've recently update from Ubuntu Mate 15.04, in which the black screen made me crazy, to 15.10, with a new installation. With the new version, after I set it up the screensaver off, everything seemed to work fine, no black screen at all. After that, I made a few customizations of the system, the last one of which was to delete from the startup applications, the power manager (I use a desktop pc so I thought that was a useless waste of time to run it). After that, and after a reboot, the hated black screen shown itself again. So I created a new startup application named Power manager and I set "mate-power-manager" as command. This simply solution worked for me and I believe that I got the problem in 15.04 for the same reason. Hope this helps.

Welcome to Ask Ubuntu! I recommend [edit]ing this answer to expand it with specific details about how to do this. (See also How do I write a good answer? for general advice about what sorts of answers are considered most valuable on Ask Ubuntu.) — David Foerster, Jan 10 '16 at 12:32

rjd · Answer 10 · 2019-10-26T16:12:21.693

While viewing videos on my htpc, the screen would blank after 10 minutes with no keyboard/mouse input. Obviously not desirable behaviour for an htpc. Turning off screensavers and power saving did not have any effect. Eventually, my web searches led me to believe this was caused by the xserver. I tested this by running the following:

xset s off && xset -dpms

in a terminal at the beginning of a session and confirmed that this did eliminate the undesired screen blanking. Running xset -q in the terminal confirms DPMS (Energy Star) was disabled.

In order to avoid having to open a terminal and run this command at the start of each session, I set this to run at system boot. The screen blanking was back and xset -q showed DPMS enabled. Further searching revealed this behaviour is initiated at login and overrides the command run at boot. To run this automatically, just add the lines below to the end of the .profile in your Home folder.

# Turn off screen blanking

xset s off && xset -dpms

If you don't see .profile, open your Home folder in your file browser, click on 'View' and select 'Show Hidden Files'. Then just right click on .profile, select 'Open with text editor', copy and paste the above on a blank line at the end of the file and save the modified file.

score 0 · Answer 11 · answered Jul 30 '16 at 13:38

0

In Greenie Linux (based on Lubuntu) I removed both xscreensaver and lightlocker and installed gnome-screensaver and added it to autostart.

answered Jul 30 '16 at 13:38

Ross Vassilev

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Welcome to Ask Ubuntu! I recommend [edit]ing this answer to expand it with specific details about how to do this. (See also How do I write a good answer? for general advice about what sorts of answers are considered most valuable on Ask Ubuntu.) Also, non-official derivatives of Ubuntu are kind of off topic on AskUbuntu. – David Foerster Jul 31 '16 at 09:27

score -1 · Answer 12 · answered Jun 03 '13 at 22:38

-1

new versions of Ubuntu is using gnome-screensaver, not xscreensaver. The settings is in System Settings -> Brightness and Lock

answered Jun 03 '13 at 22:38

Ben Lin

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not true for lubuntu. – user1873947 Jun 24 '13 at 14:39
This is the best answer for ubuntu 14.04 – ton Apr 10 '16 at 11:35

How to stop screen going black after 10 min

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