1. Forum
  2. Usenet
  3. LINUX.GENTOO.USER

  • [gentoo-user] plasmashell becomes sluggish with 100% CPU usage

    From Nikos Chantziaras@21:1/5 to All on Tue May 24 22:30:01 2022
    Anyone noticed anything lately with plasmashell? I think it started
    happening after Qt was upgraded from 5.15.3 to 5.15.4. At login, the
    desktop is very unresponsive and sluggish. Mouse clicks take over a
    second to register.

    The plasmashell process is hogging one core of the CPU to almost 100%.
    It only happens on login. Logging out and back in again usually fixes it.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Daniel Frey@21:1/5 to Nikos Chantziaras on Wed May 25 00:00:01 2022
    On 2022-05-24 13:20, Nikos Chantziaras wrote:
    Anyone noticed anything lately with plasmashell? I think it started
    happening after Qt was upgraded from 5.15.3 to 5.15.4. At login, the
    desktop is very unresponsive and sluggish. Mouse clicks take over a
    second to register.

    The plasmashell process is hogging one core of the CPU to almost 100%.
    It only happens on login. Logging out and back in again usually fixes it.



    I've had this problem for at least 2 years, can't find the cause. I sleep/resume a lot and figured it was some race condition.

    I have a Konsole shell auto-open one resume or logon so I can drop to
    the shell and issue `killall plasmashell && plasmashell &`.

    I've even tried starting with a fresh home directory and have not seen a difference. I don't use any plugins either.

    Do you have an nvidia card? This machine that constantly has this issue
    does, but my laptop (intel graphics) does not.

    Dan

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Mark Knecht@21:1/5 to realnc@gmail.com on Wed May 25 02:00:01 2022
    On Tue, May 24, 2022 at 1:20 PM Nikos Chantziaras <realnc@gmail.com> wrote:

    Anyone noticed anything lately with plasmashell? I think it started
    happening after Qt was upgraded from 5.15.3 to 5.15.4. At login, the
    desktop is very unresponsive and sluggish. Mouse clicks take over a
    second to register.

    The plasmashell process is hogging one core of the CPU to almost 100%.
    It only happens on login. Logging out and back in again usually fixes it.


    There a very old Kubuntu report about this sort of thing happening for
    years now.

    https://askubuntu.com/questions/846781/why-is-plasmashell-using-100-cpu

    Maybe there's a clue there?

    I've seen something similar maybe twice over the years but nothing recent.

    All my machines use NVidia with their driver.

    Good luck,
    Mark

    <div dir="ltr"><br><br>On Tue, May 24, 2022 at 1:20 PM Nikos Chantziaras &lt;<a href="mailto:realnc@gmail.com">realnc@gmail.com</a>&gt; wrote:<br>&gt;<br>&gt; Anyone noticed anything lately with plasmashell? I think it started<br>&gt; happening after Qt
    was upgraded from 5.15.3 to 5.15.4. At login, the<br>&gt; desktop is very unresponsive and sluggish. Mouse clicks take over a<br>&gt; second to register.<br>&gt;<br>&gt; The plasmashell process is hogging one core of the CPU to almost 100%.<br>&gt; It
    only happens on login. Logging out and back in again usually fixes it.<br>&gt;<br><div><br></div><div>There a very old Kubuntu report about this sort of thing happening for years now.</div><div><br></div><div><a href="https://askubuntu.com/questions/
    846781/why-is-plasmashell-using-100-cpu">https://askubuntu.com/questions/846781/why-is-plasmashell-using-100-cpu</a><br></div><div><br></div><div>Maybe there&#39;s a clue there? </div><div><br></div><div>I&#39;ve seen something similar maybe twice over
    the years but nothing recent.</div><div><br></div><div>All my machines use NVidia with their driver.</div><div><br></div><div>Good luck,</div><div>Mark</div></div>

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Nikos Chantziaras@21:1/5 to Daniel Frey on Wed May 25 01:50:01 2022
    On 25/05/2022 00:53, Daniel Frey wrote:
    Do you have an nvidia card? This machine that constantly has this issue
    does, but my laptop (intel graphics) does not.

    Yeah, it's nvidia using the binary driver. But I've never had this issue before. It only started happening today when I booted up the machine.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Nikos Chantziaras@21:1/5 to Nikos Chantziaras on Wed May 25 13:50:01 2022
    On 24/05/2022 23:20, Nikos Chantziaras wrote:
    Anyone noticed anything lately with plasmashell? I think it started
    happening after Qt was upgraded from 5.15.3 to 5.15.4. At login, the
    desktop is very unresponsive and sluggish. Mouse clicks take over a
    second to register.

    The plasmashell process is hogging one core of the CPU to almost 100%.
    It only happens on login. Logging out and back in again usually fixes it.

    So I decided to just let it do that and see what happens. After about 90 seconds or so, it calms down and things become normal...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)