Cannot launch into Kubuntu 23.10 with a brand new install

[thespoonman]

Thanks for posting that! I wound up selecting the Nouveau driver in the Additional Drivers tab, then switching back to the recommended NVIDIA driver, and then I reset my system. After I did all of that, I was able to launch my system normally again! I guess that the graphics driver wasn't set up properly during the install process.

$ inxi -GxxzGraphics:
  Device-1: Intel Raptor Lake-S GT1 [UHD Graphics 770] vendor: Micro-Star MSI
    driver: i915 v: kernel arch: Gen-13 ports: active: none empty: DP-1, DP-2,
    HDMI-A-1, HDMI-A-2, HDMI-A-3, HDMI-A-4 bus-ID: 00:02.0 chip-ID: 8086:a780
  Device-2: NVIDIA AD103 [GeForce RTX 4080] vendor: ZOTAC driver: nvidia
    v: 535.129.03 arch: Lovelace pcie: speed: 2.5 GT/s lanes: 16 ports:
    active: none off: DP-3 empty: DP-4,DP-5,HDMI-A-5 bus-ID: 01:00.0
    chip-ID: 10de:2704
  Device-3: Logitech HD Webcam C525 driver: snd-usb-audio,uvcvideo type: USB
    rev: 2.0 speed: 480 Mb/s lanes: 1 bus-ID: 1-5.1:7 chip-ID: 046d:0826
  Display: x11 server: X.Org v: 1.21.1.7 with: Xwayland v: 23.2.0
    compositor: kwin_x11 driver: X: loaded: modesetting,nvidia
    unloaded: fbdev,nouveau,vesa dri: iris gpu: nvidia,nvidia-nvswitch
    display-ID: :0 screens: 1
  Screen-1: 0 s-res: 2560x1440 s-dpi: 108
  Monitor-1: DP-3 mapped: DP-0 note: disabled model: Dell G2724D
    res: 2560x1440 dpi: 109 diag: 684mm (26.9")
  API: OpenGL v: 4.6.0 NVIDIA 535.129.03 renderer: NVIDIA GeForce RTX
    4080/PCIe/SSE2 direct-render: Yes

[TheFu]

Display: x11 server: X.Org v: 1.21.1.7 with: Xwayland v: 23.2.0
    compositor: kwin_x11 driver: X: loaded: modesetting,nvidia

I still think you need to
a) switch from Wayland to Xorg as the display driver
b) use the nomemset kernel boot parameter so nvidia's driver is first in the list.


There shouldn't be any mention of Xwayland in that output.

[thespoonman]

I just tried doing both of those things you mentioned, but the output of inxi -Gxxz was the exact same. The odd thing is that I always selected "Desktop Session: Plasma (X11)" from the login screen. The output stayed the same when I switched to Wayland and then back to X11 before running the command again. Also, if I try checking with echo $XDG_SESSION_TYPE, it returns x11.

[TheFu]

I don't have 23.10 on real hardware nor do I use KDE. Perhaps things have changed in newer releases.

Hopefully, someone else can help.

[MAFoElffen]

For Kubuntu 23.10,

apt list plasma-workspace-wayland --installed

If that is not there, install it...

Then do this to fix a Scaling rendering bug with KDE Plasma, for 23.10:

sudoedit /usr/share/xdg-desktop-portal/kde-portals.conf

Add this line at the end

org.freedesktop.impl.portal.Settings=kde;gtk;

Reboot to pick up that change...

At the SDDM Graphical login panel... Look at the bottom left of the screen, where it says "Desktop Session". Choose "Plasma X11". Enter your password and login.

[Yellow Pasque]

There shouldn't be any mention of Xwayland in that output.

No, that's just how inxi works nowadays. If the xwayland package is installed, it reports the version, even if Wayland isn't being used. It doesn't make sense to me either..

use the nomemset kernel boot parameter so nvidia's driver is first in the list.

If you're referring to 'nomodeset', that is not a good idea. That will disable any accelerated graphics kernel modules/drivers from loading. It is okay for the 'modesetting' (aka GLAMOR) X driver to be present/loaded on a system with an Intel GPU. That is what Intel GPU's use for 2D acceleration.
If OP is really worried about the Intel GPU interfering and wants to disable it, that can be done in the BIOS: https://www.technewstoday.com/msi-integrated-graphics/

EDIT: Actually, I'm confused about whether the OP is still having any issues. "I was able to launch my system normally again!" sounds like problem solved to me.

[thespoonman]

Sorry if I wasn't clear about it before, but my issue was resolved after switching between the Nouveau and Nvidia drivers in safe mode. Should I also ignore editing kde-portals.conf if inxi always reports Wayland in it's output?

[MAFoElffen]

printenv | grep 'XDG_SESSION_TYPE'

That will tell you whether Wayland or X11 is running. At this point you could mark the thread as "Solved". It probably doesn't matter which graphics engine is running, as now you are doing well. You know how to see what it running, and how to change it now, if you do need to.

I would still do the edit to /usr/share/xdg-desktop-portal/kde-portals.conf... That corrects a bug that affected the font scaling, that isn't backported to Kubuntu 23.10 yet. It will hit the updates eventually.

[Yellow Pasque]

We already know OP is running X.

Display: x11 server: X.Org v: 1.21.1.7 with: Xwayland v: 23.2.0
    compositor: kwin_x11

[TheFu]

printevn | grep 'XDG_SESSION_TYPE'

That's just painful and printevn doesn't exist. Shorter is:

echo $XDG_SESSION_TYPE

So,

$ echo $XDG_SESSION_TYPE
tty

$ echo $XDG_SESSION_TYPE
x11

is what I see.