[SOLVED] Driver Manager not opening at all (Error included)

[Zombiebowtiie]

Hey There.

First time posting here and on the newer side of using Kubuntu.

So yeah, Driver Manager stopped working on me all of a sudden (been about a month or two now).

I know I've installed dependencies and other things between then and now but honestly life sucks and I was **** on keeping track of things.

I'm not in any necessary need of it at the moment, but its been bothering me and was just wondering if someone knew what I could do.

Trying to run sudo kubuntu-driver-manager in the terminal gives me the following error (running System Settings (GUI) > System > Driver Manager prompts for root password then shows the program appear then disappears in the taskbar and nothing happens):

Traceback (most recent call last):
File "/usr/bin/software-properties-qt", line 146, in <module>
app = SoftwarePropertiesQt(datadir=data_dir, options=options, file=afile, attachWinID=attachWinID)
File "/usr/lib/python3/dist-packages/softwareproperties/qt/SoftwarePropertiesQt.py", line 164, in __init__
self.show_distro()
~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3/dist-packages/softwareproperties/qt/SoftwarePropertiesQt.py", line 376, in show_distro
child.setCheckState(Qt.PartiallyChecked)
^^^^^^^^^^^^^^^^^^^
AttributeError: type object 'Qt' has no attribute 'PartiallyChecked'
Segmentation fault

(I did try to search for this error on other forums but I couldn't find any hits. I would think I wasn't the only one but I guess I been lucky before)

For ****s and giggles I tried to run sudo apt install --reinstall kubuntu-driver-manager which tells me to try kubuntu-settings-desktop which then tells me cannot be downloaded, so that didn't work either to my ignorance or I broke something. (terminal commands below)

sudo apt install --reinstall kubuntu-driver-manager
Package kubuntu-driver-manager is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
kubuntu-settings-desktop

sudo apt install --reinstall kubuntu-settings-desktop
Reinstallation of kubuntu-settings-desktop is not possible, it cannot be downloaded.
Summary:
Upgrading: 0, Installing: 0, Removing: 0, Not Upgrading: 0

I am running 25.04, here is my System Info

Operating System: Kubuntu 25.04
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.3
Kernel Version: 6.14.0-37-generic (64-bit)
Graphics Platform: X11
Processors: 24 × AMD Ryzen 9 7900X 12-Core Processor
Memory: 31.0 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 5070
Manufacturer: ASUS

Personally new to Linux, used at work for building test web servers years back so I can navigate and execute, but need a certain degree of hand holding that has usually been a chaos amount of YouTube tutorials and or forum dives.

That being said, appreciate any help and happy to provide any additional info if I know where to look.

Thanks

[claydoh]

The Driver Manager is just a tab in the Software Sources tool. The command kubuntu-driver-manager is only an alias to opening the utility to that tab directly. So try opening that instead.

The problem is, in 25.04 I think the tool still has has a bug where it it either doesn't show in Discover, or won't open at all without using sudo, but I may be wrong here. (I do not have an install of 25.04 to check):

sudo software-properties-qt

Now, the package kubuntu-settings-desktop is the one that provides the command.
Not being able to reinstall it is probably pointing to something else being wrong.
My first knee-jerk reaction was that Plucky had reached End of Life and its repo had been mothballed, but I can't math very well for some reason, lol. This is not the issue, as that doesn't happen until January 17 2026.

But let's check:
run

sudo apt update

and

sudo apt upgrade

and see if there are any warnings or errors.

Then let's look at the package:

apt policy kubuntu-settings-desktop

This will give us info on the version installed and other information that hopefully points to a clue.

[Zombiebowtiie]

Hey There!

Thanks so much for responding and the info!

So I actually ended up finding out before finishing your recommended measures that I oopsy daisy disabled some important repos at some point in time (When you mentioned plucky, it tickled my memory pool)

I just went into sources.list.d and manually enabled every repo in there and boom things are back up and running. I guess I also had a bigger isue with things not updating so that too is also fixed.

Thanks again for the help, I have no idea how to mark this as SOLVED but yeah, done deal.

[claydoh]

Good that you found the fix

The only repos that might be considered for disabling are any that you have explicitly added yourself. All the base Ubuntu repo components are necessary.