It looks like 'python' process ID 131869 is the main problem there using
a lot of CPU.
To a lesser extent you also have 'anaconda-naviga', 'paraview-real' and
'brave' (browser tabs) using most of the memory.
I can also see Brave is struggling with Nouveau driver bugs,
particularly a known issue with the driver not being thread safe:
brave: ../nouveau/pushbuf.c:730: nouveau_pushbuf_data: Assertion
`kref' failed.
So you should install the Nvidia driver to avoid that problem.
But I think 'python' process ID 131869 is the main problem.
** Package changed: gnome-shell (Ubuntu) => ubuntu
** Changed in: ubuntu
Status: Incomplete => Opinion
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https://bugs.launchpad.net/bugs/2116093
Title:
My system is lagging
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