To deactivate sleep mode in KDE Plasma 5.27.6 on Arch Linux, you must configure the Power Management settings within System Settings. Navigate to
Hardware >
Power Management, select your active profile, and adjust the screen timeout or set it to never turn off. This prevents automatic suspension while allowing manual control over system state.
Accessing Power Management Settings
The primary method for managing sleep behavior in KDE Plasma is through the graphical System Settings interface. Open the application menu and search for
System Settings. Once opened, locate the
Hardware category on the left sidebar and click on
Power Management. This section contains all configuration options related to energy saving, screen brightness, and system suspension. If you do not see this option, ensure that your power management daemon is running correctly by checking the status of
systemd-logind and
upower services.
Configuring Screen Timeout vs. System Sleep
It is crucial to distinguish between turning off the display and putting the entire computer to sleep. In the Power Management window, you will see a list of profiles such as "On Battery," "When plugged in," and "High Performance." Select the profile relevant to your current usage scenario. Inside each profile, there are two distinct sections:
Display Energy Saving and
System Energy Saving.
Under
Display Energy Saving, you can set the screen to turn off after a specific period. Setting this to
Never keeps the display active indefinitely. However, this does not prevent the CPU, RAM, and hard drives from entering low-power states. To fully deactivate sleep mode, you must address the
System Energy Saving section below it. Here, you will find options for
Suspend session when inactive. Change this setting to
Do not suspend. This ensures that even if no input is detected for hours, the operating system remains fully awake and responsive.
Disabling Automatic Suspend via Advanced Options
Sometimes, the graphical interface may not override deeper system-level policies enforced by systemd. If the sleep mode still activates despite your changes in System Settings, you need to modify the logind configuration file. Open a terminal and edit the file
/etc/systemd/logind.conf using a text editor with root privileges, such as
sudo nano /etc/systemd/logind.conf. Look for the following lines:
#HandleLidSwitch=suspend
#IdleAction=suspend
Uncomment these lines by removing the hash symbol (
#) at the beginning and change their values to
ignore. The final configuration should look like this:
HandleLidSwitch=ignore
IdleAction=ignore
Saving this file and restarting the systemd-logind service with
sudo systemctl restart systemd-logind applies the changes immediately. This step is particularly important for laptop users who want to keep the system running while the lid is closed or during long periods of inactivity. Note that disabling idle actions may increase battery drain on laptops, so consider re-enabling it when unplugged.
Verifying the Configuration
After making these adjustments, verify that the settings have taken effect. You can check the current status of the power management daemon by running
loginctl show-session $XDG_SESSION_ID -p IdleAction in the terminal. It should return
IdleAction=ignore. Additionally, test the behavior by leaving the computer idle for the duration previously configured for sleep. If the screen stays on and the system does not wake up abruptly upon mouse movement, the deactivation was successful. For more information on resolving other KDE-specific issues, such as freezing problems, refer to our guide on
Fixing KDE Freezing Issues: Troubleshooting Guide.
Alternative Methods Using Command Line Tools
For advanced users who prefer command-line management, tools like
pm-set or direct interaction with
dbus can be used. However, modifying
logind.conf remains the most reliable method across different desktop environments. If you encounter keyboard layout issues after changing power settings, which might affect your ability to access menus, check our article on
Troubleshooting Keyboard Layout Issues on Garuda Dragonized for potential conflicts.
Frequently Asked Questions
Will disabling sleep mode damage my hardware?
No, disabling sleep mode does not physically damage hardware. However, it increases wear on components like hard drives (if not SSD) and consumes more electricity. Modern hardware is designed to run continuously without degradation from staying awake.
How do I revert these changes if I regret them?
To revert changes, open
/etc/systemd/logind.conf again and comment out the lines you modified by adding a
# at the start. Restart the
systemd-logind service to restore default behavior. In System Settings, simply reset the profiles to their original values.
Does this work for both desktops and laptops?
Yes, these settings apply to both form factors. On laptops, be cautious about keeping the system awake while closed if the cooling is insufficient, as this could lead to overheating. Desktop users generally face no thermal risks from this configuration.
Can I set different sleep behaviors for battery and AC power?
Absolutely. KDE Plasma allows you to create separate profiles for "On Battery" and "When Plugged In." You can set the battery profile to suspend quickly to save power, while the AC profile runs with sleep disabled for maximum performance.
Why did my screen stay black but the PC was still on?
This indicates that the display timeout was active, but the system sleep was disabled. The GPU turned off the video signal to save energy, but the CPU remained active. Adjust the Display Energy Saving settings separately from System Energy Saving if you want to control these independently.