Avoid sddm-greeter to have high CPU usage
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Avoid sddm-greeter to have high CPU usage

Publish Date: Feb 12 '22
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Summary

My iMac having Ubuntu kept having high CPU usage with the program sddm-greeter.

Solution

Amending the file /etc/security/pam_env.conf fixed up the issue :

/etc/security/pam_env.conf
======
#
# Avoid high cpu usage with sddm-greeter
# https://github.com/sddm/sddm/issues/323
QT_QUICK_BACKEND DEFAULT=software
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Reference

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Comments 1 total

  • rulatir
    rulatirDec 10, 2023

    This is a very poor, nonspecific, whole-system reduction-in-functionality solution. It boils down to completely giving up on hardware accelaration in many important contexts. My KDE desktop looks different after enabling this workaround (e.g. desktop icon labels get background rectangles instead of being text-shaded) because a lot of code paths in KDE Plasma choose different, less CPU-intensive visual effects when software rendering is forced.

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