How to disable sleep and configure lid power settings for Ubuntu or Red Hat Linux 7 for Dell laptops

Disable sleep and configure lid power settings for Ubuntu or Red Hat Linux 7

Disable sleep:

1. Open a Terminal following the steps below for your specific operating system:
   • Open a Terminal for Ubuntu (Figure 1):

     
     Figure 1: Open Terminal for Ubuntu

   • Open a Terminal for Red Hat Enterprise 7 using the keyboard command of Ctrl + Alt + T.
   • You can also open a Terminal in Red Hat Enterprise 7 by going to the Applications menu, selecting Utilities, then Terminal from the list (Figure 2):

     
     Figure 2: Open Terminal from Applications/Utilities menu

   • You may also be able to open a Terminal in Red Hat Enterprise 7 from the main Applications menu (Figure 3):

     
     Figure 3: Open Terminal from Applications menu

2. After opening a Terminal, run the following command: # systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target

Enable sleep:

1. Open a Terminal .
2. Run the following command: # systemctl unmask sleep.target suspend.target hibernate.target hybrid-sleep.target

Configure lid power settings:

1. Open the /etc/systemd/logind.conf file for editing.
2. Find the line #HandleLidSwitch=suspend.
3. Remove the # character at the beginning of the line.
4. Change the line to either of the desired settings below:
   • HandleLidSwitch=poweroff to shutdown computer when lid is closed
   • HandleLidSwitch=hibernate to hibernate computer when lid is closed
   • HandleLidSwitch=suspend to suspend computer when lid is closed
   • HandleLidSwitch=ignore to do nothing to do nothing
5. Save the file and restart the service to apply the changes by typing # systemctl restart systemd-logind.