https://bugs.kde.org/show_bug.cgi?id=440386
--- Comment #4 from Fabian Vogt <fab...@ritter-vogt.de> --- I also tried playing a video in FF in Weston using the DRM backend and CPU usage is ~25%. I had a look at how weston deals with received buffers and copying damaged regions into local textures and it uses the same unpack mechanism as kwin on the master branch meanwhile. Even running kwin master, CPU usage is at ~75% just for showing the spinning circle loading animation. (In reply to Nate Graham from comment #3) > Cannot reproduce; kwin_wayland hovers at around 12.8% (single core) while a > video is playing in Firefox on my 4k screen in the Plasma Wayland session. Apparently only kwin_wayland running in DRM mode in VMs without 3d acceleration is affected. I'm suspecting something related to kms_swrast.so at this point, but I'm not sure. You could try LIBGL_ALWAYS_SOFTWARE=1 startplasma-wayland, I haven't actually tried that on real HW yet. -- You are receiving this mail because: You are watching all bug changes.
