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Kubuntu 26.04.1 (X11) – Thunderbird custom notification sound resets the idle timer

wonder — Sun, 11 Oct 2026 11:15:39 GMT

Kubuntu 26.04.1 (X11) – Thunderbird custom notification sound resets the idle timer

wonder — Sun, 11 Oct 2026 11:15:39 GMT

Hi everyone!

I've recently moved back from Kubuntu 24.04.5 to 26.04.1 to see if some of the issues I encountered when I first tried 26.04 have been fixed.

I always make a full system image with Rescuezilla before upgrading or changing versions, so I can easily go back to 24.04.5 if needed. That's actually what I did after my first attempt with 26.04.

I'm still using X11 exclusively. I've tried Wayland again, but some of the problems I reported here on the forum some time ago are still present, so for now I'm sticking with X11.

Anyway, while testing 26.04.1, I noticed something strange with Thunderbird and the automatic screen and power management.

I'm using Thunderbird installed through Schwarzer Kater's excellent script:

https://www.kubuntuforums.net/forum/...al-thunderbird

I also use Birdtray to keep Thunderbird in the system tray. I initially thought it might be involved, but after testing with Birdtray out of the picture, I was able to rule it out.

By the way, I've also updated Birdtray and got it working properly with my current setup. I'll share the details in a separate post.

The problem is that whenever Thunderbird plays my custom WAV notification sound for a new email, the X11 idle timer seems to reset, even though I haven't touched the keyboard or mouse.

I noticed this because the monitors weren't turning off when expected, and automatic suspension was sometimes being delayed.

After quite a few tests, with some help from ChatGPT to monitor xprintidle, examine the system logs and compare the results, we managed to narrow it down quite a bit.

Here's what I've found so far:

With my custom WAV selected in Thunderbird, the xprintidle counter resets when the notification sound plays.
If I switch Thunderbird to its default notification sound, I haven't been able to reproduce the problem.
Playing that same WAV file with Audacious doesn't reset the idle timer either.
I've also tested without Birdtray running, and it doesn't appear to be responsible.

So it doesn't seem to be simply the WAV file or audio playback in general. It looks more like something related to how Thunderbird handles custom notification sounds, although I can't say for certain what's causing it.

One important detail: I never experienced this behaviour on Kubuntu 24.04.5, where I was also using Thunderbird installed as a traditional .deb package, not Snap.

I haven't tested the Snap version of Thunderbird on 26.04.1, so I don't know whether it behaves the same way. And, to be honest, I don't plan to test it unless I really have to. I prefer to avoid Snap whenever possible.

Also, just to clarify, Thunderbird isn't permanently blocking suspension. What I've actually observed is the idle timer being reset when the custom sound plays, which can delay whatever actions depend on that timer.

For now, I've left Thunderbird using its default notification sound, and everything seems to be working normally.

I'm happy to run further tests or provide logs if that helps.

Thanks everyone!

PS: I don't know if this is the best subforum for this post...

fsck failed

trvatrva — Fri, 09 Oct 2026 12:02:32 GMT

I have problem with my Sumsung Portable SSD T5 (SSD disk). I can't mount it in my system. I wrote in bash:

sudo fsck /dev/sdb1

and reply is:

fsck from util-linux 2.41.3
fsck: fsck.ntfs not found; ignore /dev/sdb1

Can you help me to fix my SSD Disk by fsck.

[Hardware]New computer/pre install compatability check

steve7233 — Thu, 08 Oct 2026 16:57:19 GMT

Is the RAGNROCK RK 104 fully compatible with Ubuntu Core? I think it is mostly, but what about controlling the RGB? There are 19 colors, so it would be nice to be able to control them from Kubuntu 26.04. I will be using an I7 9th gen, so the MOBO has an LGA1151 Socket and the Z390 chipset.

[Software]How to Type Tamil language Using English words (Tanglish) in Kubuntu 26.10?

happy winter — Thu, 08 Oct 2026 06:38:14 GMT

Hello everyone,

Good day to you!

I would like to know how to install and enable Tamil fonts and Tamil typing/transliteration support in Kubuntu 26.10.

When I was using Windows, I used Azhagi+, which allowed me to type Tamil using English characters (Tanglish), for example:

vanakkam → வணக்கம்
epdi irukeenga → எப்படி இருக்கீங்க

I would like to have similar functionality in Kubuntu, mainly for WhatsApp, web browsers, and other chat/messaging applications.

Could someone please guide me on the following?

How to install/enable Tamil fonts and language support?
How to enable Tamil Tanglish transliteration?
Is there a built-in Linux/Kubuntu solution, or do I need additional software?
Is there any software similar to Azhagi+ for Linux?
Will it work system-wide in WhatsApp, browsers, and other applications?
Can Azhagi+ be installed directly on Kubuntu, or can the Windows version be used through Wine? If so, are there any limitations or special configurations required?

I am specifically looking for transliteration/input support, not just Tamil fonts. My requirement is to type in English/Tanglish and have it converted to Tamil script while typing.

If anyone has already configured this on Kubuntu 26.10, I would greatly appreciate a simple step-by-step guide, including the required software/packages and settings.

Thank you!

(NOTE # it is the same topic also posted in https://discuss.kde.org) "First of all, thank you everyone here! I know this topic isn't directly related to Kubuntu OS bugs, software errors, or display issues—it is for a personal project where I need Tanglish tamil language support on Kubuntu 26.10. I truly appreciate you taking the time to read this, answer my questions, and provide such helpful guidance."

"I wasn't sure where to post my Kubuntu software issues, so I shared them in both places. Thanks for understanding! I also need simple, step-by-step help on how to install Tamil fonts.."

Regards,

Happy Winter

can't install new version of Haruna

trvatrva — Wed, 07 Oct 2026 12:06:56 GMT

Can you explain to me why I can't install new version of Haruna, My ubuntu.sources file is:

URIs: http://archive.ubuntu.com/ubuntu
Suites: resolute resolute-updates resolute-backports
Components: main universe restricted multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
Types: deb
URIs: http://security.ubuntu.com/ubuntu/
Suites: resolute-security resolute resolute-updates resolute-backports
Components: main universe restricted multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

I entered net disk:
archive.ubuntu.com/ubuntu/pool/universe/h/haruna/
There I see Haruna version 1.8.1
And I wrote in Konsole: sudo apt install haruna=1.8.1
But reply is: Error: Version '1.8.1' for 'haruna' was not found
Can you explain to me how I can install Haruna version 1.8.1.

[SOLVED]Missing Ubuntu 26.04.1 Default Sources after upgrade from 24.04.5

DrexLock — Tue, 06 Oct 2026 22:35:38 GMT

I upgraded my existing 24.04.5 install on my desktop to 26.04.1 without issue but noticed in Discover that the "Ubuntu 26.04.1 LTS" Sources section is not present, I included a screenshot because I wasn't exactly sure what the actual name of this section of sources is. I only noticed because the fresh install of 26.04.1 on my laptop does have it. I was able to view software sources on my desktop using software-properties-qt and flag the Chrome Repo to be included in updates. I did notice that the software-properties-qt window looks like it is an older version compared to what is on my laptop. Are there steps I can follow to fix Discover not showing the software sources menu and make sure it is as current as my laptop?

awk/sed/whatever bash question

oshunluvr — Tue, 06 Oct 2026 19:51:09 GMT

I wrote and maintain a set of Dolphin Service Menus to allow some btrfs functionality to be accessible from Dolphin.

I am adding the ability to determine if a "btrfs send|btrfs receive" operation was successful. The success or failure is is indicated by two items retrievable from "btrfs su show". They are "Received UUID:" followed by a UUID and "FLAGS:" followed by "readonly". Both entries are only set if the send|receive operation completes successfully.

One uses the "btrfs su show" action to see the full list of subvolume information, which looks like this:

Code:

sudo btrfs su show @KDEneon_backup
Name:                   @KDEneon_backup
UUID:                   00983575-f97d-d942-9537-f4c8c29bc77a
Parent UUID:            0bef4f24-2620-7443-84d2-43c82a79e690
Received UUID:          16716210-06d4-ea42-9048-7449068cb643
Creation time:          2026-10-06 05:39:35 -0400
Subvolume ID:           2246
Generation:             14825
Gen at creation:        14820
Parent ID:              5
Top level ID:           5
Flags:                  readonly
Send transid:           2145521
Send time:              2026-10-06 05:39:35 -0400
Receive transid:        14821
Receive time:           2026-10-06 05:39:36 -0400
Snapshot(s):
Quota group:            n/a

If the send|receive operation fails, the fields after "Received UUID" and "Flags:" have a dash in them instead of the above.

The question: Is there a preferred or "better" way to extract this information from the above output?

Currently, I'm using:

Code:

RECEIVED_UUID=`sudo -S btrfs su sh $SOURCE | awk 'NR >4 && NR<=5 {print $3}'`
READONLY_FLAG=`sudo -S btrfs su sh $SOURCE | awk 'NR >11 && NR<=12 {print $2}'`

$SOURCE is the full path and filename of the selected subvolume. The above awk statements retrieve the Received UUID and "readonly" from Flags, and it works.

I then use a conditional "if - or" to check for the dash instead of anything else:

Code:

if [[ $RECEIVED_UUID == '-' || $READONLY_FLAG == '-' ]]; then

so if either entry is not set, the script reports that it failed or wasn't a "sent" snapshot.

I feel like there must be a handful of other ways to scrape the info. Mostly, I'm just curious, but having "solid" code is always a good idea.

Thoughts?

[Desktop]Last machine to upgrade to Kubuntu 26.04. Any potential problems?

Centurion030 — Tue, 06 Oct 2026 18:56:55 GMT

Hey all!

All of my other machines, two laptops and two desktops, have been upgraded to Kubuntu 26.04. For the most part, the upgrade from 24.04 went fairly well. Now, one desktop initially showed the Kodi screen, but after I got back to the KDE login, I noticed the selection and have since ensured it's correct. That one was weird.

The final one is as follows:
Dell T7910 (72 total cores w/256 GB mem)
A 14 TB main drive and a 4 TB SSD for local backups
Kubuntu 24.04
Nvidia driver 580.178.04 with a Quadro K2200 (4GB memory)
A 43" main monitor and a side 27" monitor

I have been reading the forums and Google regarding the 580.178.04 Nvidia driver and Kubuntu 26.04. And, I am a bit concerned. The driver is the Nvidia one, not the open one.

Any pitfalls to learn from and/or avoid?

Very respectfully,

James

[RESOLVED]format external ssd for backup

LostRaccoon — Tue, 06 Oct 2026 13:26:21 GMT

Hi everyone,
I am new to linux (Kubuntu 26.04, transitioning from macos) and I am a bit lost... I just bought a new external ssd which I intend to use for backup, but I am unable to mount it... The device is seen in the KDE partition manager and the SMART status seems ok. However partition manager stated that no usable partition could be found, so I supposed this was the problem. I tried creating a single partition with the partition manager, and I now have one, unallocated, partition on the disk. Yet this did not solve the issue... The question is how should I format / partition the disk for its intended usage ? Thank you for your help !

[SOLVED]LibriOffice Problem and Touchpad gesture lack of pinch

AgentKaboom — Mon, 05 Oct 2026 17:10:45 GMT

Hello everybody, I recently installed Kubuntu on my laptop, and the journey was pretty well. Everything worked good if not better then on Windows after configuration. But surprisingly, I didn't find any customizations for the tachpad gestures and surprising lack of support for pinch to zoom (on anything else but the browser) even though I'm on Wayland KDE Plasma 6.6.6. And also I noticed that LibriOffice Draw would behave a lot more lager compared to my Windows system even with hardware acceleration ON (I literally tried everything from increasing the cache size to running it with

Code:

QT_QPA_PLATFORM=xcb libreoffice --draw

).
Please help

My system spack:

ASUS Vivobook S14 M5406UA

Kubuntu 26.04.1 LTS

Kernel: Linux 7.0.0-34-generic

CPU: AMD Ryzen 9 8945HS (16) @ 4.00 GHz

iGPU: AMD Radeon 780M Graphics

Using preinstalled version of LibreOffice suite on my Kubuntu

A late Monday afternoon

die.boer — Mon, 05 Oct 2026 16:18:44 GMT

Me fixing to braai a bit
https://youtube.com/shorts/z68Hv7cfT...F_HHHnMVYcrai2

Weird music playback problem

Teunis — Mon, 05 Oct 2026 15:27:00 GMT

Two years ago I ripped some CD's to .ogg.
Now I found out playing a single file will ask for a for me unknown password.
But throwing (dragging) the file on a player like SMPlayer or VLC will play it.
What could cause this?

Random screen flashes under CPU load on a AMD Renoir iGPU after 7.0.0-34 → 7.0.0-38 upgrade

mheaton58 — Mon, 05 Oct 2026 13:10:58 GMT

Confirmation of an issue discovered in Kernel 7.0.0-38 dealing with the screen flickering during high performance. The following are the detail of my situation and why i reverted back to kernel 7.0.0-34 which resolved my problem. post has been made to Ubuntu as the issue has also been reported there.
(https://bugs.launchpad.net/ubuntu/+s.../2169181/+edit)

Hardware: Beelink SER4 mini PC, AMD Ryzen 7 4800U (Renoir iGPU, DCN 2.1), 32 GB RAM
Display: 1920x1080 @ 60 Hz over HDMI (HDMI-A-2)
OS: Kubuntu 26.04, KDE Plasma (Wayland)

Problem: With kernel 7.0.0-38-generic, the screen randomly flashes whenever the
CPU is under sustained heavy load (HandBrake encoding, or stress-ng --cpu 0).
Flashes appear within a few minutes of load starting.

Booting 7.0.0-34-generic on the same system, with the same settings, gives no
flashes over 25+ minutes of full CPU load (HandBrake) plus ~50% GPU load.

Reproduce: stress-ng --cpu 0 --timeout 20m on 7.0.0-38.

Ruled out:
- HDMI cable and ports (swapped)
- Temperature (CPU Tctl ~75°C at full load)
- Power draw (still flashes with CPU capped to 1.4 GHz, PPT ~10 W)
- CPU scheduling (still flashes with stress-ng at nice 19)
- Clocksource (TSC was falling back to HPET; tsc=reliable did not change it)
- GPU clock switching (power_dpm_force_performance_level=high did not change it)
- amdgpu.sg_display=0 is set on both kernels
No amdgpu/drm errors appear in dmesg when the flashes occur.

This looks like a regression between 7.0.0-34 and 7.0.0-38.

[SOLVED]After Update to 26.04 Siganl app display is flickering

linufix — Mon, 05 Oct 2026 13:08:27 GMT

Hello everybody,
this is my system:

Betriebssystem: Kubuntu 26.04 LTS
KDE-Plasma-Version: 6.6.6
KDE-Frameworks-Version: 6.24.0
Qt-Version: 6.10.2
Kernel-Version: 7.0.0-38-generic (64-bit)
Grafik-Plattform: Wayland
Prozessoren: 12 × AMD Ryzen 5 3600 6-Core Processor
Arbeitsspeicher: 32 GiB (31,3 GiB nutzbar)
Grafikprozessor: AMD CAICOS
Hersteller: Micro-Star International Co., Ltd
Produktname: MS-7B86
Systemversion: 4.0

After updating to 26.04 LTS version, my Signal apps display is very unstable and flickering.
Hovering the mouse over the Signals window seems to influence the flickering behavior.
When scrolling or viewing pictures the display is heavily disturbed.

Is this a known behavior? And if yes is there something to do about it?

Cheers
Erich