Re: [gentoo-user] Wayland and CPU load

[Michael <confabulate@kintzios.com>]

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On Thursday 5 September 2024 20:00:12 BST Peter Humphrey wrote:
> On Thursday 5 September 2024 15:43:00 BST Iwrote:
> > On Thursday 5 September 2024 13:47:29 BST I wrote:
> > > ... Perhaps I should start recompiling things...
> > 
> > After an emerge -e1 kwayland plasma-workspace and a reboot, kwin_wayland
> > is
> > down to 20-60% CPU and plasma_shell is barely visible in /top/.
> > 
> > Much improved, but it still isn't right.
> 
> It came back again, so I ran a complete -e, rebooted, recompiled the kernel
> again and rebooted again.
> 
> It's all back as it was - no CPU cycles left for anything else but wayland
> and plasam-shell.
> 
> How to debug this?

At a simple level you can check this file for any obvious problem:

~/.local/share/sddm/wayland-session.log

Your symptom could be related to software rendering used by the kwin 
compositor, as opposed to OpenGL.  Mesa with appropriate USE flags should 
provide what your graphics need.  Have a look in kinfocenter, or run:

qdbus6 org.kde.KWin /KWin supportInformation

and check the section under Compositor, Compositor Type is not showing Xrender 
or software rendering.

Beyond this I think you're into compiling stuff with debugging symbols and 
trying to understand where code fails:

https://community.kde.org/KWin/Debugging

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