For additional information: I installed the proprietary drivers and KDE Plasma is super snappy. I am posting from KDE plasma with the binary drivers ... so, this is clearly a combination of Plasma, Open Source drivers, Wayland and NVIDIA GPU.
$ apt list |grep installed |grep nvidia WARNING: apt does not have a stable CLI interface. Use with caution in scripts. libnvidia-cfg1-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] libnvidia-common-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] libnvidia-compute-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] libnvidia-decode-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] libnvidia-egl-wayland1/resolute,now 1:1.1.18-1 amd64 [installed,automatic] libnvidia-encode-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] libnvidia-extra-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] libnvidia-fbc1-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] libnvidia-gl-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] linux-objects-nvidia-580-6.18.0-8-generic/resolute,now 6.18.0-8.8 amd64 [installed,automatic] linux-objects-nvidia-580-6.18.0-9-generic/resolute,now 6.18.0-9.9+1 amd64 [installed,automatic] linux-signatures-nvidia-6.18.0-8-generic/resolute,now 6.18.0-8.8 amd64 [installed,automatic] linux-signatures-nvidia-6.18.0-9-generic/resolute,now 6.18.0-9.9+1 amd64 [installed,automatic] nvidia-compute-utils-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] nvidia-dkms-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] nvidia-driver-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed] nvidia-firmware-580-580.95.05/resolute,now 580.95.05-0ubuntu4 amd64 [installed,auto-removable] nvidia-firmware-590-590.48.01/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] nvidia-kernel-common-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] nvidia-kernel-source-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] nvidia-prime/resolute,resolute,now 0.8.17.2build1 all [installed,automatic] nvidia-settings/resolute,now 510.47.03-0ubuntu6 amd64 [installed,automatic] nvidia-utils-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] xserver-xorg-video-nvidia-590/resolute,now 590.48.01-0ubuntu1 amd64 [installed,automatic] On Sun, Jan 25, 2026 at 11:00 AM Leo Milano <[email protected]> wrote: > Public bug reported: > > I am testing Ubuntu 26.04 on a spare partition. This is an upgrade from > 25.10. Logging into KDE Plasma is simply unusable in my system. Even > trying to open a menu to get some diagnostics is nearly impossible. But > I could ctrl-alt-t to a terminal, and run top: kwin_wayland is taking > most of the cores cpu, at almost 1600%, with 16 threads available. > Memory usage by the process is low. > > regular Ubuntu login is super snappy. Happy to test if it helps, this is > an LTS so I thought I would drop a report. > > ### Release > $ lsb_release -rd > Description: Ubuntu Resolute Raccoon (development branch) > Release: 26.04 > > ### Package version > $ apt-cache policy kwin-wayland > kwin-wayland: > Installed: 4:6.5.5-0ubuntu1 > Candidate: 4:6.5.5-0ubuntu1 > Version table: > *** 4:6.5.5-0ubuntu1 500 > 500 http://us.archive.ubuntu.com/ubuntu resolute/universe amd64 > Packages > 100 /var/lib/dpkg/status > > ### Nvidia GPU > $ lspci |grep -i vga > 05:00.0 VGA compatible controller: NVIDIA Corporation GA106 [GeForce RTX > 3060 Lite Hash Rate] (rev a1) > > ### Nvidia graphics stack: open-source; Synaptic also reports no prop > drivers in use. > $apt list |grep installed |grep nvidia > > WARNING: apt does not have a stable CLI interface. Use with caution in > scripts. > > libnvidia-compute-580/resolute,now 580.95.05-0ubuntu4 amd64 > [installed,automatic] > linux-modules-nvidia-535-generic/resolute,now 6.18.0-9.9+1 amd64 > [installed] > linux-modules-nvidia-580-6.18.0-8-generic/resolute,now 6.18.0-8.8 amd64 > [installed,automatic] > linux-modules-nvidia-580-6.18.0-9-generic/resolute,now 6.18.0-9.9+1 amd64 > [installed,automatic] > linux-modules-nvidia-580-generic/resolute,now 6.18.0-9.9+1 amd64 > [installed,automatic] > linux-objects-nvidia-580-6.18.0-8-generic/resolute,now 6.18.0-8.8 amd64 > [installed,automatic] > linux-objects-nvidia-580-6.18.0-9-generic/resolute,now 6.18.0-9.9+1 amd64 > [installed,automatic] > linux-signatures-nvidia-6.18.0-8-generic/resolute,now 6.18.0-8.8 amd64 > [installed,automatic] > linux-signatures-nvidia-6.18.0-9-generic/resolute,now 6.18.0-9.9+1 amd64 > [installed,automatic] > nvidia-firmware-580-580.95.05/resolute,now 580.95.05-0ubuntu4 amd64 > [installed,automatic] > nvidia-kernel-common-580/resolute,now 580.95.05-0ubuntu4 amd64 > [installed,automatic] > nvidia-prime/resolute,resolute,now 0.8.17.2build1 all [installed,automatic] > > ** Affects: kwin (Ubuntu) > Importance: Undecided > Status: New > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/2139043 > > Title: > kwin_wayland 4:6.5.5-0ubuntu1 completely taking over the CPU in ubun > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/kwin/+bug/2139043/+subscriptions > > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2139043 Title: kwin_wayland 4:6.5.5-0ubuntu1 completely taking over the CPU in ubun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kwin/+bug/2139043/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
