Kubuntu Forums - Newbie Support

[SOLVED] Can't get login script to not prompt for password

knuuser — Wed, 17 Jun 2026 11:11:07 GMT

Can't get login script to not prompt for password.

The script is run on startup and the effects can be seen before first login, yet after I login I am prompted for a password.

I have a script:
-rwxrwxr-x 1 nick nick 43 Jun 17 20:57 /home/nick/Documents/Scripts/run_on_login.sh

Code:

#!/bin/bash
systemctl enable --now ratbagd

I want it to run on login to enable mouse customization. So I add it to autostart and it creates the file:
-rw------- 1 nick nick 162 Jun 17 20:41 home/nick/.config/autostart/run_on_login.sh.desktop

I then created the file:
-rw-r----- 1 root root 239 Jun 17 20:54 /etc/sudoers.d/my_custom_rules

and have tried all these entries at once

Code:

root ALL=(ALL) NOPASSWD: /home/nick/Documents/Scripts/run_on_login.sh
root ALL=(ALL) NOPASSWD: /home/nick/.config/autostart/run_on_login.sh.desktop
nick ALL=(ALL) NOPASSWD: /home/nick/Documents/Scripts/run_on_login.sh
nick ALL=(ALL) NOPASSWD: /home/nick/.config/autostart/run_on_login.sh.desktop

yet I am still prompted for a password after login.

What am I doing wrong?

How do I run a script without being prompted for password?
Do I have to change the script owner to root, I was hoping to avoid that.

My Kubuntu 26.04 LTS System Keeps Hanging; When it Recovers, I Get a Memory Shortage Avoided message from the kernel

DinoNerd — Tue, 16 Jun 2026 07:58:31 GMT

I have a kubuntu system currently running 26.04, upgraded from 25.10

On both releases, the system would hang from time to time. Often when it finally recovered I'd see a message like this

Today by the time it recovered I had 3 of these messages.

AFAIK, Linux is a demand paged operating system. Given this, it did not run out of *memory*, it ran out of virtual memory. Put another way, it ran out of swap space.

I presume therefore that the initial installation of Kubuntu made a bad decision about the total amount of swap space to configure, and *if* linux has a way to add swap space dynamically (and automatically), that ability was not turned on by the installation.

If this analysis is correct, (1) how can I fix the swap space configuration and (2) how do I report the presumed problem with the installation process?

Can it be fixed at all without reinstalling from scratch. (I don't recall whether I was even given an option to configure how my SSDs/disks would be used.)

Alternatively, my knowledge of the linux kernel is out of date, and the old OOM system I knew and didn't much like a decade ago has been replaced with something even worse, such that the amount of RAM in the system effectively limits the amount of swap space usable. I understand that MacOS and iOS compress user process memory in preference to paging it to disk, though MacOS can then page out the compressed memory; iOS on the other hand cannot page out individual pages - it's whole process or nothing. I don't know the motivation for the MacOS variant, but the iOS variant is intended to protect SSDs with a limited number of write cycles available. (The compression mechanism is also faster than paging, but I don't think any user is going to notice.) Perhaps Linux has implemented something similar, now that SSDs are overwhelmingly popular?

Finally, is it just that linux is no longer good at running on "low end" hardware? I "only" have 32 GB of RAM, which I would have expected to be enough, even with a job lot of firefox tabs trying to call home to get more ads, even though they aren't currently on screen. Maybe linux is even more bloated than MacOS, where a 16 GB system only started misbehaving in a similar way about 2 years ago, after the horrible OS upgrade that caused me to start moving from MacOS to linux. (And it just randomly kills the web browser once or twice a week, without a hang, whereas Kbuntu got 3 processes this time, including both Firefox and my mail client.)

24.4 reinstall. What do I need to note from current install (users, drives, permissions) etc

new666uk — Wed, 10 Jun 2026 19:09:22 GMT

After continual graphic glitches in my currrent install, I'm going to bite and reinstall.

Currently I have a few physical drives mounted (ex my Windows box) with all my movies and TV episodes.

Is it worth/ possible do save info like the users, permission and the drive structure to ease setup of the reinstall or is it literally a case of starting all over again from scratch? The only additional programmes I need to install will be plex and maybe jellyfin.

I recall setting up plex permissions was a pita so really hoping I can salvage from the old install.

Thanks
paul

Can't Screen Grab or Share Screen after switching to PulseAudio on Kubuntu 26.04

Natsukian — Sun, 07 Jun 2026 00:22:59 GMT

Hi there,

So I've upgraded from Kubuntu 25 to Kubuntu 26 a month ago.
But when it booted up I noticed it couldn't send 5.1 sound though the Toslink port on my motherboard.
While digging, I found that PulseAudio had been replaced by Pipewire, and that Pipewire didn't support such profile through integrated motherboard ports, only through GPU outputs (like HDMI).
Anyway, I changed it back to PulseAudio cause it worked fine for me and I do enjoy my surround sound. (While changing it I also noticed that PulseAudio now automatically up mixes stereo stream to 5.1 if selected as an output profile, it's excellent !)
But now, if I try to record my screen with OBS or just share it on Discord, I get an error :

Code:

Failed to connect PipeWire context

It's kind of becoming annoying, especially since I don't care about recording the sound, and even if I did, how can I get it to work while still using PulseAudio ?

Here are my specs :

System:
Host: MUTHER Kernel: 7.0.0-22-generic arch: x86_64 bits: 64
Desktop: KDE Plasma v: 6.6.4 Distro: Kubuntu 26.04 LTS (Resolute Raccoon)
Machine:
Type: Desktop Mobo: ASUSTeK model: ROG STRIX B450-F GAMING v: Rev 1.xx
serial: Firmware: UEFI vendor: American Megatrends
v: 3103 date: 06/17/2020
CPU:
Info: 8-core model: AMD Ryzen 7 3700X bits: 64 type: MT MCP cache:L2: 4 MiB
Speed (MHz):avg: 3811 min/max: 2200/4549 cores:1: 3811 2: 3811 3: 3811
4: 3811 5: 3811 6: 3811 7: 3811 8: 3811 9: 3811 10: 3811 11: 3811 12: 3811
13: 3811 14: 3811 15: 3811 16: 3811
Graphics:
Device-1: NVIDIA GP106 [GeForce GTX 1060 6GB] driver: nvidia v: 580.159.03
Device-2: Logitech Webcam C300 driver: snd-usb-audio,uvcvideo type: USB
Display: wayland server: X.org v: 1.21.1.22 with: Xwayland v: 24.1.10
compositor: kwin_wayland driver:X:loaded: nvidia
unloaded: fbdev,modesetting,nouveau,vesa gpu: nvidia,nvidia-nvswitch
resolution:1: 1024x768~60Hz 2: 1680x1050~60Hz 3: 1920x1080~60Hz
API: EGL v: 1.5 drivers: nvidia,swrast
platforms: gbm,wayland,x11,surfaceless,device
API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: nvidia mesa v: 580.159.03
renderer: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2
API: Vulkan v: 1.4.341 drivers: nvidia,llvmpipe surfaces: N/A
Info:Tools:api: clinfo, eglinfo, glxinfo, vulkaninfo
de: kscreen-console,kscreen-doctor gpu: nvidia-settings,nvidia-smi
wl: wayland-info x11: xdriinfo, xdpyinfo, xprop, xrandr
Audio:
Device-1: NVIDIA GP106 High Definition Audio driver: snd_hda_intel
Device-2: Advanced Micro Devices [AMD] Starship/Matisse HD Audio
driver: snd_hda_intel
Device-3: Logitech Webcam C300 driver: snd-usb-audio,uvcvideo type: USB
API: ALSA v: k7.0.0-22-generic status: kernel-api
Server-1: PulseAudio v: 17.0 status: active

I've been looking around for a couple of hours, but can't seem to find anyone with a similar issue...
I'm not really new to Kubuntu, but I kinda feel like it's an easy problem, and I'm just not looking at it the right way.

Thanks in advance !

Natsukian

Discover stopped working

TyrianRoseViolet — Fri, 05 Jun 2026 15:07:56 GMT

Here's what I'm working with:

Operating System: Kubuntu 26.04 LTS
KDE Plasma Version: 6.6.4
KDE Frameworks Version: 6.24.0
Qt Version: 6.10.2
Kernel Version: 7.0.0-22-generic (64-bit)
Graphics Platform: Wayland
Processors: 6 × Intel® Core™ i5-9500 CPU @ 3.00GHz
Memory: 32 GiB of RAM (31.1 GiB usable)
Graphics Processor: Intel® UHD Graphics 630

Discover suddenly crashed and won't run again. I've tried reinstalling from the Konsole, but that didn't help.

When I run plasma-discover from Konsole, this is what I get:

org.kde.plasma.libdiscover: OdrsReviewsBackend: Fetch ratings: true
adding empty sources model QStandardItemModel(0x5fb02d13fde0)
qrc:/qt/qml/org/kde/discover/qml/DiscoverWindow.qml:119:5: QML Shortcut: Shortcut: Only binding to one of mul
tiple key bindings associated with 15. Use 'sequences: [ ]' to bind to all of them.
render glyph failed err=62 face=0x5fb02d4c2dd0, glyph=54
KCrash: Application 'plasma-discover' crashing... crashRecursionCounter = 2
Segmentation fault (core dumped) plasma-discover

I can force Discover to run using sudo plasma-discover but I'd rather fix it so works properly. Any ideas?

Questions about restoring an install to a new encrypted install using Timeshift

Elliot Alderson — Fri, 05 Jun 2026 11:08:08 GMT

Rather than starting a new thread, I'll piggyback off this one.
I've read, and see it confirmed here, that post-installation encryption is possible but not worth the hassle, but I just wanted to bounce an idea off the experts.
I have both Timeshift & Rescuezilla images/backups.
If I install fresh from scratch, and I restore an image from Timeshift or the full image from rescuezilla, does the encryption stick, or does the recovered data stay in its original unencrypted form?

External drive size issues

GlockG20 — Wed, 03 Jun 2026 13:09:06 GMT

So a picture is worth a 1000 words... but I can't seem to get the screenshot loaded here... so the issue is I have an 8TB external hard drive, in KDE Partition manager it shows 7.28TB but down lower in the window it shows 7.28Tb with 21.61GB used and when I format the drive the system only sees about 1.3TB of the 7.28. This is a drive I have been using for Timeshift backups. While my system was Kubuntu 24.04. I just recently upgraded to 26.04 and went to run Timeshift when I started running into a series of odd issues. The biggest is Timeshift would fail to complete the back up.

[No Pain~]$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 3.1G 3.4M 3.1G 1% /run
/dev/nvme0n1p1 458G 21G 432G 5% /
tmpfs 16G 344M 15G 3% /dev/shm
efivarfs 128K 66K 58K 54% /sys/firmware/efi/efivars
none 1.0M 0 1.0M 0% /run/credentials/systemd-journald.service
none 1.0M 0 1.0M 0% /run/credentials/systemd-resolved.service
/dev/nvme0n1p3 470G 4.7G 442G 2% /Xtras
/dev/nvme0n1p1 458G 21G 432G 5% /swap
tmpfs 16G 36M 16G 1% /tmp
/dev/nvme0n1p4 8.6G 8.2M 8.6G 1% /boot/efi
/dev/nvme1n1p1 3.7T 1.7T 1.9T 48% /home
tmpfs 3.1G 5.4M 3.1G 1% /run/user/1000
/dev/mapper/sdb1_crypt 1.3T 8.9M 1.3T 1% /run/timeshift/50367/backup
/dev/sdh1 1.3T 2.1M 1.2T 1% /run/media/ian/f6d21463-bac6-4b76-88c7-90128a67c5b9

I tried doing a complete shred on the drive ( that was a 2.5 day evolution ) to see if that would clear things up and nothing. I have tried using different file systems and nothing seems to regain the total usable disk space. Don't know what to do now. Ideas?

Kubuntu 26.04 X11 black screen with wire mouse pointer and no session, just back to login screen

tux fan — Wed, 03 Jun 2026 10:31:40 GMT

After upgrading from 25.10 to 26.04, whenever I try to login to x11 with 26.04 I just get a black screen with a wire mouse pointer which hangs for a couple of minutes then it returns to the login screen.

I have tried everything to get it working even reinstalling the whole desktop with

Code:

sudo apt --purge autoremove kubuntu-desktop plasma-workspace plasma-session-x11 plasma-session-wayland
sudo apt install kubuntu-desktop plasma-workspace plasma-session-x11 plasma-session-wayland -y

But nothing is helping and when I come back from X11 to wayland all my panels, i.e. taskbars are gone, so I have to reboot the system to get wayland back to it's current state.

I need to test some issues I'm having with wayland and I know my system was working perfectly with X11 on 25.10, so need to get back to x11 for a comparison to help isolate the cause.

Also certain tools like lact just simply do not work with wayland, i.e. it cannot open a window and I do not pretend to understand why so please don't interrogate me over that.

Obviously all my drivers are up to date, etc.

EDIT: I forgot to mention that I have also tried adding a new test user to see if the problems are local to me or system wide and the issue does happen to the test user too.

Code:

Operating System: Kubuntu 26.04 LTS
KDE Plasma Version: 6.6.4
KDE Frameworks Version: 6.24.0
Qt Version: 6.10.2
Kernel Version: 7.0.0-22-generic (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 9800X3D 8-Core Processor
Memory: 64 GiB of RAM (60.2 GiB usable)
Graphics Processor 1: AMD Radeon RX 9070 XT
Graphics Processor 2: AMD Ryzen 7 9800X3D 8-Core Processor
Manufacturer: Micro-Star International Co., Ltd.
Product Name: MS-7E84
System Version: 1.0

NVIDIA and Plex server issue. Graphical corruption

new666uk — Sun, 31 May 2026 17:17:16 GMT

Sigh, I had a good run with Kubuntu generally working ok but a couple of weeks ago following a routine bunch of updates I had issues with Plex server not being seen (client and server are on same box). The media locations are all still owned by Plex so I'm not expecting a permission issue and I can access them to playback in other apps.

Unable to fix Plex, I tried to watch a movie via VLC having switched the display output to 4k as I usually do. It ran poorly with a lot of stutter leading me to look to nvidia. In driver manager, I've switched between driver version 530 (tested) and 580 (the latest supporting my 1050 GPU). Weirdly Plex seems to be able to connect to the media drives if I use nvidia v530 but not 580 but runs poorly (as does VLC in both).

Perplexed by the odd nvidia / Plex, I've purged and reinstalled nvidia driver 580 and still have the same issue. I suspect I'm no longer outputting via the GPU, only the onboard GFX as CPU usage spikes to 70 - 99% on playback. The GPU is physically installed and connected. I'm pretty sure I used

Code:

nvidia-smi

to check it's seen.Via the nvidia app I've set it to on demand and performance (on separate boot ups) but I note that the app doesn't show the menu options in the left of the image below (not mine, just illustrative)

In a moment of "what can I try next?", I installed nvidia 590 driver but upon reboot now I get no display output at all, just a "no HDMI input" message from the display itself. That was clearly my biggest error. I'm going off memory for a lot of what I did so bear with. I think I used

Code:

sudo apt update
sudo apt install nvidia-driver-590

to install 590.

Now, with no output at all, I've tried to use both Escape and Shift (on separate attempts) to log into Grub on boot in an effort to revert the driver back to nvidia v580 but still no output detected on the display.

Recap in brief:
4k playback is choppy in VLC and Plex
GPU may not be in use
Nvidia driver 580 seems to coincide with an issue in Plex client not seeing the server
Nvidia driver 530 results in normal Plex access
Both 530 and 580 have stuttering in 4k media play

I only tend to use the machine at weekends as a media box to watch movies hence the issue has been protracted over a couple of weeks.

Running Kubuntu 24.04 LTS.
GPU is a 1050ti and I'm using nvidia driver version 530 and 580.The 1050 GPU is only supported upto driver 580 I (now) believe.

So, are my options to torch it and reinstall 24.04 from an SD card?

Apologies for the long read and thanks in advance to anyone how can advise.

Black Screen After Loging into my wayland session

BarelyAlive — Thu, 28 May 2026 12:12:04 GMT

I've been using Kubuntu for some time now. But recently I've been experiencing black screens without my cursor whenever i logged into my wayland session. My X11 session still works nonetheless.

Specifications:

KDE Plasma ver: 6.3.4
KDE Frameworks ver: 6.12.0
Qt ver: 6.8.3
Kernel ver: 6.14.0-15-generic(64bit)
Graphics platform: X11

Help me with fixing (new kubuntu user)

kbuntuiebwen74857263 — Thu, 28 May 2026 05:06:34 GMT

Hello, i am new to Kubuntu, and i have noticed that when my pc falls into sleep mode after some period of inactivity, usually after 30 minutes, then when i wake it up by pressing on the mouse, and i am met with the login screen, but then my keyboard does not work at all, my numlock is automatically on and does not turn off even if i press on it, i just simply cannot type in my password, keyboard is on but does not react at all when i press But my mouse works and i can move it around and even click and it works, i can click to go back into sleep mode by clicking it which does that, or to switch users which leads to a freeze, the solution i found is that i usually hard restard by holding the power off/on button and only then it starts into kubuntu as usual, but i do not want to hard restart every single time after leaving my laptop for more than 30 minutes. i had this problem as soon as i booted into Kubuntu the first time (yesterday) so i have not touched any important files or anything, it was like this from the start.

i dual booted linux, i followed every instruction on youtube, seems like i did everything right. But this problem is weird. If anyone had a similar problem and fixed it, or if someone more experienced knows what this is caused by and how to fix it i would be very thankful.

libkf6activities Package

cchipdive — Mon, 25 May 2026 00:10:59 GMT

So I'm trying to install libkf6activities and apt is not finding it at all. Can anyone give me a package? (OS is Kubuntu 26.04 LTS)