Kubuntu Forums - Help the New Guy

No sound upon start, automatically decreases to 0, libcanberra in settings constantly restarts

Pieniążkowice — Thu, 02 Apr 2026 12:42:57 GMT

Hi there,

I am working on a rather old computer, if you need more details about it you can look at this post here:

https://forums.linuxmint.com/viewtop...70354#p2770354

So I got Kubuntu 25.10, and the installation sort of went okay, but then I got no sound at all, which was not an issue during a LiveUSB session.

In the middle of the screen, I have a "Audio Muted" box I cannot remove. In the Sound tab in System Settings,

Code:

libcanberra

is going absolutely nuts and is constantly changing volume from a certain non-zero value to 0, and so in a loop. I can't find a way to stop this loop.

Moreover, while I can move the slider on the speakers panel to the right, the volume is automatically being reduced to 0. I do sometimes hear the speakers work but I can't stop the system from decreasing the volume. By default, they are off.

Ran

Code:

pactl subscribe

as suggested elsewhere, and I see a constant loop of new events that looks like this:

Event "new" on sink-input
Event "change" on sink-source x2
Event "change" on sink
Event "change" on source
Event "change" on sink-input
Event "remove" on sink-input
Event "change" on sink
Event "change" on source

and this is going on and on

My CPU is constantly at 50% load, which is ridiculous for an ambient workload. Memory is not impacted.

An additional piece of ibfo that may be relevant is that I get a lot of 26^~ symbols upon booting, but itbdoes not interrupt anything.

Any help appreciated.

Darn high-res display :-)

merlinsilk — Thu, 02 Apr 2026 00:18:31 GMT

Hello - and good day from the newest member here.

I have just installed 24.04 as a dual boot on my laptop with the idea of slowly but surely moving away from Windows.
But I immediately ran into a problem I can't seem to overcome: Everything on my display - I use a 4k Samsung TV and let the built-in display rest - is too small for my aging eyes. Not a new problem (on windows I just crank up the scaling), and I quickly found the global scaling in the settings - but they don't do anything! Somebody on the interweb thought that I have to logout/in - but that made no difference.
My machine is a six year old Maingear Element with an I7 and an NVIDIA GeForce GTX 1660 Ti.

Probably related but also very disturbing is the fact that I often can't find my cursor - just too small and nearly the same color as the background. I changed the cursors to a different scheme, but somehow still the old - small - one is shown on the desktop.

Any light shed on this dark situation would be highly appreciated.
Cheers,
Merlin

Firefox scrambled when I open it.

Sethcard — Tue, 31 Mar 2026 06:58:56 GMT

So when I open Firefox now it looks scrambled. I’m not sure what caused this. I am using an nvidea graphics card rtx 4070. Any ideas on what to do. I plan on doing a full reinstall, but I would like to save some stuff if I can get firefox open again.

[RESOLVED]Are a firewall and antivirus necessary in Kubuntu?

greenster — Mon, 30 Mar 2026 14:53:19 GMT

I'm keen to hear your thoughts...

Should I use a firewall and antivirus in Kubuntu?

At the moment, I'm not using either.

Is that risky?

Is Kubuntu live boot via USB C possible?

newuser0001 — Mon, 30 Mar 2026 09:42:46 GMT

Hello guys,

I want to try Kubuntu on my Dell Latitude 7320 2 in 1 detachable, which only allows to plug in USB-C devices.

Since it would not be the classical Situation where you have a USB-Stick as a booting device, my question is:

Is it generally possible to boot Kubuntu from USB-C?

I know that it will still depend on the individual device. My goal is to check Kubuntu out from the USB-C device and See if it supports auto rotation and camera properly. But if this goal is technically impossible, it would already be really helpful to know.

High battery drain on laptop with dGPU

batterysaver — Wed, 25 Mar 2026 13:40:38 GMT

I’m troubleshooting high battery drain on a Lenovo Legion Slim 5 16APH8 on Kubuntu with:

AMD Radeon 780M iGPU
NVIDIA GeForce RTX 4070 Mobile dGPU
BIOS graphics mode set to Both (only options are Discrete or Both)
Kernel 6.17

My goal is to have the iGPU handle normal desktop use and have the dGPU only wake when explicitly needed.

I installed:
sudo apt update
sudo apt install nvidia-driver-580-open nvidia-prime
sudo prime-select on-demand

Refresh rate is set to 60 Hz.

The desktop renderer is the AMD iGPU, confirmed by:
glxinfo | grep "OpenGL renderer"

which shows:
OpenGL renderer string: AMD Radeon 780M Graphics ...

So the system is in the correct hybrid graphics setup.

The good state

Sometimes the NVIDIA GPU does go properly to sleep. When that happens:
cat /sys/bus/pci/devices/0000:01:00.0/power/runtime_status
cat /proc/driver/nvidia/gpus/0000:01:00.0/power

show:
suspended
Runtime D3 status: Enabled (fine-grained)
Video Memory: Off

In that state, battery life improves a lot. I saw roughly 12–15 W in the better moments. The bad state / remaining problem

The problem is that this does not stay stable.

At other times the same checks show:
active
Runtime D3 status: Enabled (fine-grained)
Video Memory: Active

When that happens, actual battery discharge jumps back up to around 25–27 W. I checked real battery power with:
cat /sys/class/power_supply/BAT1/power_now

For example:
25089000

which is about 25.1 W.

When the GPU is in the bad state, this command:
sudo lsof /dev/nvidia* 2>/dev/null

shows that the thing holding the NVIDIA device open is usually just:
Xorg

and on some Wayland tests it was:
Xorg
Xwayland

So the main remaining issue seems to be:

the driver / PRIME / AMD-rendering setup is correct, but Xorg sometimes wakes or keeps the dGPU awake anyway.

Possible solution / current best setup

The best setup I have found so far is:
sudo apt update
sudo apt install nvidia-driver-580-open nvidia-prime
sudo prime-select on-demand

Then verify with:
glxinfo | grep "OpenGL renderer"
cat /sys/bus/pci/devices/0000:01:00.0/power/runtime_status
cat /proc/driver/nvidia/gpus/0000:01:00.0/power

Desired good state:

AMD renderer active
runtime_status = suspended
Video Memory = Off

Use NVIDIA apps only explicitly with:
prime-run

Has anyone found a reliable way to stop Xorg from waking the NVIDIA GPU again on this laptop / on Kubuntu, while keeping hybrid graphics and on-demand mode working normally?

Can't get Kubuntu to boot on HP x360 laptop

ulnpiper — Sun, 15 Mar 2026 23:25:18 GMT

I've been trying to move from Win 11 to Kubuntu 25.10 for a few days with no luck.

I can boot off a live USB with Kubuntu but not able to boot off the HD. I am able to load Ubuntu on the HD and boot via F9 boot menu, but not without going through the menu.

When I try to boot off the HD with either Kubuntu or Ubuntu it just goes to a black screen. The last thing I've tried is to dual partition Ubuntu and Kubuntu, but no luck booting from either one now.

I've disabled the secure disk and RAID in the bios and tried about every possible setting.

Any recommendations will be greatly appreciated.

Thanks, Gary

One more piece of info, I tried another re-partition and install, after hitting F9 to the boot menu, I got a flash of "unknown file system" before it went to the menu to select to boot from the USB (eg Try or Install Kubuntu)

System:
Host: kubuntu Kernel: 6.17.0-5-generic arch: x86_64 bits: 64
Desktop: KDE Plasma v: 6.4.5 Distro: Kubuntu 25.10 (Questing Quokka)
Machine:
Type: Convertible System: HP product: HP Spectre x360 Convertible 15-df0xxx
v: N/A serial:
Mobo: HP model: 8518 v: 10.73 serial: UEFI: AMI
v: F.49 date: 04/25/2023
Battery:
ID-1: BAT0 charge: 33.3 Wh (78.3%) condition: 42.5/42.5 Wh (100%)
volts: 11.45 min: 11.55
CPU:
Info: quad core model: Intel Core i7-8565U bits: 64 type: MT MCP cache:
L2: 1024 KiB
Speed (MHz):avg: 800 min/max: 400/4600 cores:1: 800 2: 800 3: 800 4: 800
5: 800 6: 800 7: 800 8: 800
Graphics:
Device-1: Intel WhiskeyLake-U GT2 [UHD Graphics 620] driver: i915 v: kernel
Device-2: NVIDIA GP108M [GeForce MX150] driver: nouveau v: kernel
Device-3: Quanta HP Wide Vision FHD Camera driver: uvcvideo type: USB
Display: wayland server: X.org v: 1.21.1.18 with: Xwayland v: 24.1.6
compositor: kwin_wayland driver:gpu: i915 resolution: 3840x2160~60Hz
API: EGL v: 1.5 drivers: iris,nouveau,swrast
platforms: gbm,wayland,x11,surfaceless,device
API: OpenGL v: 4.6 compat-v: 4.3 vendor: intel mesa v: 25.2.3-1ubuntu1
renderer: Mesa Intel UHD Graphics 620 (WHL GT2)
API: Vulkan v: 1.4.321 drivers: intel,nvk,llvmpipe
surfaces: xcb,xlib,wayland
Info:Tools:api: clinfo, eglinfo, glxinfo, vulkaninfo
de: kscreen-console,kscreen-doctor wl: wayland-info x11: xdriinfo,
xdpyinfo, xprop, xrandr
Audio:
Device-1: Intel Cannon Point-LP High Definition Audio
driver: sof-audio-pci-intel-cnl
API: ALSA v: k6.17.0-5-generic status: kernel-api
Server-1: PipeWire v: 1.4.7 status: active
Network:
Device-1: Intel Cannon Point-LP CNVi [Wireless-AC] driver: iwlwifi
IF: wlp0s20f3 state: up mac: 38:00:25:e8:0b:02
Bluetooth:
Device-1: Intel Bluetooth 9460/9560 Jefferson Peak (JfP) driver: btusb
type: USB
Report: hciconfig ID: hci0 state: up address: 38:00:25:E8:0B:06 bt-v: 5.1
RAID:
Hardware-1: Intel 82801 Mobile SATA Controller [RAID mode] driver: ahci
Drives:
Local Storage:total: 1010.42 GiB used: 92.2 MiB (0.0%)
ID-1: /dev/nvme0n1 vendor: Intel model: HBRPEKNX0203AH size: 953.87 GiB
ID-2: /dev/nvme1n1 vendor: Intel model: HBRPEKNX0203AHO size: 27.25 GiB
ID-3: /dev/sda model: N/A size: 29.3 GiB type: USB
Partition:
ID-1: / size: 7.68 GiB used: 648.5 MiB (8.3%) fs: overlay source: ERR-102
ID-2: /var/log size: 10.98 GiB used: 92.2 MiB (0.8%) fs: ext4
dev: /dev/nvme1n1p5
Swap:
Alert: No swap data was found.
Sensors:
System Temperatures:cpu: N/A mobo: N/A gpu: nouveau temp: 33.0 C
Fan Speeds (rpm): N/A
Info:
Memory:total: 16 GiB available: 15.35 GiB used: 4.3 GiB (28.0%)
Processes: 290 Uptime: 1h 1m Shell: Bash inxi: 3.3.39

Operating System: Kubuntu 25.10
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Kernel Version: 6.17.0-5-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 16 GiB of RAM (15.4 GiB usable)
Graphics Processor 1: NVIDIA GeForce MX150
Graphics Processor 2: Intel® UHD Graphics 620
Manufacturer: HP
Product Name: HP Spectre x360 Convertible 15-df0xxx

Dual boot setup complete - Windows deleted - Expand EXT4 partition

greenster — Sun, 15 Mar 2026 18:31:59 GMT

Today I deleted Windows from the hard drive that also has Kubuntu on it. I formatted the Windows partition using ext4. Now I have two ext4 partitions of equal size.
How can I expand the Kubuntu partition to its full size?

Mac Neo + Kubuntu

natman — Fri, 13 Mar 2026 16:22:53 GMT

Hi ,
Would like to buy a new laptop, and the mac neo appeals for my light use. Is installing Kubuntu on a mac a bad idea? Am I losing all the advantages of battery life etc etc cause the hardware was not designed for Kubuntu ?

Use of dkpg in Kunbuntu - can't remove app

patvr — Thu, 12 Mar 2026 23:34:20 GMT

Operating System: Kubuntu 24.04
KDE Plasma Version: 5.27.12
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Kernel Version: 6.17.0-14-generic (64-bit)
Graphics Platform: X11
Processors: 4 × AMD A8-5600K APU with Radeon(tm) HD Graphics
Memory: 7.0 GiB of RAM
Graphics Processor: AMD ARUBA
Manufacturer: Gigabyte Technology Co., Ltd.

- I recently install the Terminus (terminus-app) Modern SSH client from a .deb file downloaded at https://termius.com/ using

sudo dpkg -i Terminus.deb

- Not really liking it I then wanted to remove it from my system and get the following:

patvr@sizz-linux00:~/Desktop$ sudo dpkg -r terminus-app
dpkg: warning: ignoring request to remove terminus-app which isn't installed

- So checking a bit further with

patvr@sizz-linux00:~/Desktop$ sudo dpkg -l

- I get the following output which clearly shows that something is there

ii tcpdump 4.99.4-3ubuntu4.24.04.1 amd64 command-line network traffic analyzer
ii telnet 0.17+2.5-3ubuntu4.1 all transitional dummy package for inetutils-telnet default swit>
ii termius-app 9.37.4 amd64
ii thermald 2.5.6-2ubuntu0.24.04.3 amd64 Thermal monitoring and controlling daemon

- When it is running I see this about the processes

patvr 9285 1533 0 12:26 ? 00:00:02 /opt/Termius/termius-app --enable-crashpad
patvr 9289 9285 0 12:26 ? 00:00:00 /opt/Termius/termius-app --type=zygote --no-zygote-sandbox --enable-crashpad --enable-crashpad
patvr 9290 9285 0 12:26 ? 00:00:00 /opt/Termius/termius-app --type=zygote --enable-crashpad --enable-crashpad
patvr 9292 9290 0 12:26 ? 00:00:00 /opt/Termius/termius-app --type=zygote --enable-crashpad --enable-crashpad
patvr 9387 9289 0 12:26 ? 00:00:03 /opt/Termius/termius-app --type=gpu-process --enable-crashpad --enable-crash-reporter=7119622e-f616-4df8-943e-84b0416
patvr 9391 9285 0 12:26 ? 00:00:00 /opt/Termius/termius-app --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-GB --service-sandbo
patvr 9398 9285 0 12:26 ? 00:00:03 /opt/Termius/termius-app --type=renderer --enable-crashpad --enable-crash-reporter=7119622e-f616-4df8-943e-84b0416506
patvr 9405 9285 1 12:26 ? 00:00:03 /opt/Termius/termius-app --type=renderer --enable-crashpad --enable-crash-reporter=7119622e-f616-4df8-943e-84b0416506
patvr 9416 9285 3 12:26 ? 00:00:11 /opt/Termius/termius-app --type=renderer --enable-crashpad --enable-crash-reporter=7119622e-f616-4df8-943e-84b0416506

What am I doing wrong?

installation iso 24.04.4 et iso 24.04.3 buggées

Petitlou60 — Wed, 11 Mar 2026 10:27:01 GMT

Hello everyone,
I'm installing a new Linux system.
Naturally, I downloaded the Kubuntu-24.04.4-desktop-amd64 image.

I started the installation almost immediately, but I got the message "python failure invalid python script"!!!

From the archives, I downloaded the Kubuntu-24.04.3-desktop-amd64 image and created a new live USB.

I started the installation, and after 19 minutes, everything froze—no CPU usage, no I/O!

Luckily, I found an old live USB created with the Kubuntu-24.04.2-desktop-amd64 version. The installation went quickly and without any problems.

However, all these ISOs have the same annoying bugs:

1) When selecting French as the language, the keyboard layout remains QWERTY.
2) The installer refuses to see the /dev/mapper/* files, which forces a lot of workarounds when you want a customized encrypted system.

Multiple Apps Seemingly Not Running or Getting Focus

DinoNerd — Sat, 07 Mar 2026 19:47:39 GMT

First of all, I apologize if this is another case of user-is-half-asleep, aka an idiot. (I've already made one post of that kind, and then was unable to figure out how to delete it, or at least report it solved.)

Second of all, I'm aware that the following is useless as a bug report. Instead of gathering farther data, I rebooted the system, just as if it was a Windows box. All I'm looking for is whether people recognize the pattern and can point me to possible causes or work-arounds.

As of this morning when I woke up, my Kubuntu 25.10 system had been up for 7 days. It appeared to be mostly working, but when I selected the ProtonMail app, it looked funny, as if it wasn't being given focus, and didn't show recent email messages, which I could see from another device. I was able to switch to Firefox and Konsole Windows, which worked normally. So far, this looked like a ProtonMail issue. But then I tried to select the Discord app, and got essentially the same behaviour - missing recent messages. I'm not sure whether it also had the doesn't-look-selected glitch.

Multiple attempts to select either of these apps and get them to refresh failed. I spent some time killing off firefox windows, so they wouldn't respawn after a restart. In doing this I verified I could switch virtual desktops, using the tool in the panel. I could select app windows, provided they weren't Discord or ProtonMail. I could run shell commands in Konsole windows.

The two apps are unrelated. All they have in common are that they don't come from Ubuntu repos, and part of their job is to receive and display things that are happening on a server somewhere in the cloud.

I therefore figure the problem probably isn't with them, but somehow with Kubuntu. It smells to me like a Desktop environment bug, mostly because the alternative would seem to be the kernel scheduler, or the networking stack.

I don't recall whether I did anything before rebooting that would have told me for sure that the kubuntu system was successfully communicating with the internet. Other systems on the same LAN were talking happily to the net, e.g. successfully running ProtonMail and Discord, and internet connectivity was fine after I rebooted.

Discord version 0.0.126 at the time; after the reboot, I was forced to upgrade it to 0.0.127

ProtonMail version unknown; it doesn't seem to want to tell me, but it too is pushy about insisting that everyone upgrade as soon as a new version comes out.

p.s. ProtonMail had been set to show on all virtual desktops, and Discord might have been. They are essentially the only apps I ever set that way.

p.p.s. I tried to select them by clicking on them/their title bars, not by clicking on their icon in the task manager.

p.p.p.s. If it happens again, I'll try to gather some more useful data, rather than rebooting to clear the problem.