[Post-Install] x11... a traumatic ecperience

[Scorpa54]

I have installed the x11 desktop but when I log out and tab my way through, there is no cursor, to select that session I get my wallpaper and no cursor or navigation panels of any sort which leaves me with one option, hard reboot. I have tried multiple times with the same effect.

[die.boer]

all my linux career i've used X11 , and been nothing but a pleasure , even now on 26.04 i'm on X11
not sure i understand your troubles really, the description you give confuses me lol

[Schwarzer Kater]

semi off topic:
"Traumatic", hm? I have treated people who did experience traumatic events (e.g. because they came from a war zone) in the past. None of them used X11…


on topic:

like die.boer I don't quite get what your actual problem is:

is there no mouse cursor after you have logged into an X11 session,
or is there no mouse cursor in the SDDM log in screen,
<additions>
or do you use multiple monitors and don't see SDDM anymore,
or has the resolution changed to something like 7680x4800 by itself in X11 so you cannot see any panel anymore after logging in,
</additions>
or …?

And perhaps change the thread title accordingly (to e.g. "No mouse curser after logging into X11 session")…

How did you install Kubuntu 26.06 LTS and the X11 session: fresh install and bonus step c. (Kubuntu 26.04 LTS - important things to do after an installation) or release upgrade from …?


I mainly use X11 in Kubuntu 26.06 LTS and I have not had any problems at all - aside from little annoying, graphical glitches like that the design of my preferred mouse cursor (Oxygen White) did not stay consistent.
Adding it with
sudo update-alternatives --install /usr/share/icons/default/index.theme x-cursor-theme /usr/share/icons/Oxygen_White/index.theme 90
and selecting it with
sudo update-alternatives --config x-cursor-theme
solved this for me.


In Kubuntu if you cannot log out/reboot (and the system is not totally "frozen") you can e.g. always press
[Ctrl] [Alt] [Backspace] to get to the log in screen
or press
[Alt] [Space] to start KRunner and type reboot
by the way…

[claydoh]

Try a fresh user account and see if it happens there


*Switching* between the two does seem to do odd things with screen/desktop setups in a few cases, such as virtual machines so other setups might also see oddities?
I do mean specifically switching between them, not just installing or running one or the other. Sort of like there are separate monitors, or monitor configs somehow.

Let's gather some info:

I have installed the x11 desktop

How did you do this?

My first second questions is: which Nvidia driver did you install post-install, if any?

The second third one: what is/was not working for you in Wayland? aka why switch? Any problems there might offer clues.

And #4, because I can't get all of my questions out in one go: Did you by any chance use the "apply Plasma Settings" from Wayland? This feature iirc used to only work properly in Wayland, not X11, though I have not tested this in some time. I thought that there was messaging to this effect when using the feature, which I do not see now. Just a random thought, here, though, as I assume the login was working fine previously?

And a fifth: any custom theming with SDDM?


sddm runs a separate instance of a display server, not the same one the desktop is using, so if you are seeing a broken login screen there might be other issues casung this than just switching the desktop to x11.

It this keeps happening, and it is too frustrating to log in from, you can still log in manually to either a wayland session or an x11 one:

hit ctrl-alt-F3 (or other number) to get to a vT.
Log in.
then use either:

startplasma-wayland

or

startplasma-x11

You should at least be able to get to your desktop and do things.

Logging out here will send you back to that vT.

[claydoh]

"Traumatic", hm? I have treated people who did experience traumatic events (e.g. because they came from a war zone) in the past. None of them used X11…

You've never had a multiscreen setup with two high-refresh rate monitors drop down to 60hz because you plugged in a TV screeen, I take it ? That was bloddy heck traumatic if you ask me!

[Schwarzer Kater]

off topic:
I personally don't have any use for monitor refresh rates > 60 Hz, so: no… Well, OK, I have had some issues with SDDM when I additionally plugged in a TV, but I solved it with configuration files.

[claydoh]

I personally don't have any use for monitor refresh rates > 60

Give one a try some time, it isn't just for gaming. Thye difference between 60 and 75 you probably won't notice. 100Hz you might be able to tell the crispness difference.

But 120+, it is so much easier on the eyes, well, my astigmatic ones, at least. I miss having those 165hz screens, they weren't even expensive.

OK, OT , time to back to work lol

[Scorpa54]

semi off topic:
"Traumatic", hm? I have treated people who did experience traumatic events (e.g. because they came from a war zone) in the past. None of them used X11…

Yup, this has pretty much been a war zone setting up

How did you install Kubuntu 26.06 LTS and the X11 session: fresh install and bonus step c. (Kubuntu 26.04 LTS - important things to do after an installation) or release upgrade from …?

Installed 26.04 from usb
sudo apt install plasma-session-x11

In Kubuntu if you cannot log out/reboot (and the system is not totally "frozen") you can e.g. always press
[Ctrl] [Alt] [Backspace] to get to the log in screen
or press
[Alt] [Space] to start KRunner and type reboot
by the way…

The wallpaper on screen 1 is the same size and my 2nd screen is black at least until it starts searching for a device which it doesn't find

[Scorpa54]

My first second questions is: which Nvidia driver did you install post-install, if any?

nvidia 595 driver

The second third one: what is/was not working for you in Wayland? aka why switch? Any problems there might offer clues.

Some of my programs require x11

And #4, because I can't get all of my questions out in one go: Did you by any chance use the "apply Plasma Settings" from Wayland? This feature iirc used to only work properly in Wayland, not X11, though I have not tested this in some time. I thought that there was messaging to this effect when using the feature, which I do not see now. Just a random thought, here, though, as I assume the login was working fine previously?

No on the "apply Plasma Settings" and I wouldn't know, I have never used log in/out in my life before this

And a fifth: any custom theming with SDDM?

I have no idea what SDDM is so it is highly unlikely I have altered it.