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Thread: Kubuntu 18.04 WebRTC videocalls CPU 100% spikes

  1. #1
    Join Date
    Apr 2020

    Question Kubuntu 18.04 WebRTC videocalls CPU 100% spikes

    Hello Ubuntu Community,

    I have a problem with my Kubuntu 18.04 system.

    My CPU keeps spiking to 100% usage while being in videocalls. Used Jitsi and Google Meets and tried both video call programs in Google Chrome as well as in Firefox.

    In both browsers the problem exists.

    AFAIK Jitsi and Google Meets both use WebRTC. When the spikes occur the audio and video is stuttering and it is impossible to understand what people are saying. The whole systems hangs during spike times and I can not write text messages via Slack etc.
    When not being in a videocall everything runs smooth without any problems. Normal videos do not seem to affect system performance (tried 10 tabs with 1080p video playing simultaneously). It seems only to occur in videocalls.
    My system is the following:

    • Lenovo ThinkPad T490 Laptop
    • Intel Core i7-8565U CPU
    • 16GB RAM
    • 1TB SSD
    • Kubuntu 18.04 with HWE Kernel (5.3.0), all Updates installed
    • Default Xorg installation, nothing modified, not using Wayland

    I verified that the Intel graphics driver is being loaded as a Kernel module.

    Screenshot taken during Google Meets Call with 54 participants
    My colleagues do not have these problems even though most of them are using older hardware.
    Any help would be greatly appreciated.

    Best regards,

  2. #2
    Join Date
    Apr 2020

    Re: Kubuntu 18.04 WebRTC videocalls CPU 100% spikes

    Any idea?

  3. #3
    Join Date
    Oct 2009
    Reykjavík, Ísland

    Re: Kubuntu 18.04 WebRTC videocalls CPU 100% spikes

    If you have some unused space on the hard disk you could install Kubuntu 20.04 to see if anything works better. Your hardware is so new that I am not sure that 18.04 is the best option.
    Bringing old hardware back to life. About problems due to upgrading.
    Please visit Quick Links -> Unanswered Posts.
    Don't use this space for a list of your hardware. It only creates false hits in the search engines.

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