After strolling through blogs and forums, I still can’t tell what I’m missing by sticking with SDDM+X11 versus SDDM+Wayland on Kubuntu 24.04 LTS (--minimal-install, so no snap for me).

These are my specs:

-----------------
OS: Kubuntu trixie/sid (noble) x86_64
Kernel: 6.8.0-58-generic
Uptime: 1 hour, 12 mins
Packages: 2 (npm), 2550 (dpkg), 28 (flatpak-system)
Shell: bash 5.2.21
Resolution: 1920x1080 @ 164.92Hz
DE: Plasma 5.27.12 [KF5 5.115.0] [Qt 5.15.13] (x11)
WM: KWin
Theme: klassy [KDE/Qt], Breeze [GTK2/3]
Icons: BeautySolar [KDE/Qt/GTK2/3]
Cursor: breeze_cursors [GTK2/3]
Terminal: konsole
Terminal Font: Noto Mono 12
CPU: AMD Ryzen 9 5950X (32) @ 3.4GHz
GPU: NVIDIA GeForce RTX 3090
Memory: 4.15 GiB / 31.24 GiB (13%)
Network: Wifi
Bluetooth: Intel Corp. AX200
BIOS: American Megatrends Inc. 5.17 (03/18/2024)

Sun Apr 27 13:03:03 2025
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 570.133.07             Driver Version: 570.133.07     CUDA Version: 12.8     |
|-----------------------------------------+------------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id          Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |           Memory-Usage | GPU-Util  Compute M. |
|                                         |                        |               MIG M. |
|=========================================+========================+======================|
|   0  NVIDIA GeForce RTX 3090        Off |   00000000:0A:00.0  On |                  N/A |
|  0%   47C    P0             43W /  350W |     714MiB /  24576MiB |      2%      Default |
|                                         |                        |                  N/A |
+-----------------------------------------+------------------------+----------------------+