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?

Solution 1

Try installing :

sudo apt-get install xfce4-power-manager

then configure it in:

xfce4-power-manager-settings 

Solution 2

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

Solution 3

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.

Solution 4

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

Solution 5

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.

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Comments

[Admin]

See my solution here: askubuntu.com/questions/351849/…

[Admin]

I can confirm this behaviour for Ubuntu 14.04 after Upgrade from 13.04. The trick by TenPlus1 is working for me.

[Admin]

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): ubuntuforums.org/showthread.php?t=2251377&highlight=

[user1873947]

why is it temporary solution? Is it like running this command disables the blanking only for current session?

[user1873947]

not true for lubuntu.

[sivaprakash]

Or xset s off

[Braiam]

Why you think he should install xfce4-power-manager?

[Arturo Veras]

it works for me. Easy and simple solution.

[Eliah Kagan]

I believe this is the correct answer. But I recommend expanding this to explain exactly where to find that, perhaps even with a screenshot.

[swietyy]

You can always disable Energy Star features: xset -dpms

[Ghita]

On ubuntu 14.04 this doesn't work

[Ivan Fateev]

This is the correct answer for sure. I've found this in Main menu button (on panel)-> Preferences >> Light Locker Settings

[smertrios]

the only one that worked for me after updating my 14.04. thx.

[David Foerster]

Welcome to Ask Ubuntu! I recommend editing 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.)

[ton]

This is the best answer for ubuntu 14.04

[David Foerster]

Welcome to Ask Ubuntu! I recommend editing 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.

[prathvi]

LightDM GTK+ Greeter Settings has been renamed to Login in Mate > 18.04, and unfortunately the screen blanking setting no longer exists