I am not sure whether this is the right community for this question, so please let me know if it's better to ask somewhere else:

I am getting a message, saying,

The issuer certificate of a locally looked up certificate could not be found.

How do I solve this? (I am running on Debian).

At first Instead of my SDDM I would just see an after image of what was last displayed on screen. But if I typed in my password and pressed enter, it would let me in just fine. Then after following some suggestions from users in r/Kubuntu I've made a bit of progress. Now when I boot up my computer instead of the SDDM being invisible, it now doesn't load at all, from there I switch to tty3 then back to tty2 and then log in through the terminal. After that I run startplasma-wayland and then I have access to my desktop. The post where all this went down - https://www.reddit.com/r/Kubuntu/comments/1nvreuo/sddm_not_rendering/

Does anyone know a fix? I would like to be able to see my login screen.

Here's my specs in case that would help - https://i.imgur.com/XtC43zw.png

And here's my journalctl output after booting and launching plasma - https://pastebin.com/nnGsWebd

As a community-driven flavor of Ubuntu, Kubuntu continues its mission to deliver the cutting-edge KDE software ecosystem on top of Ubuntu’s rock-solid foundation. This interim release, aligned with Ubuntu’s six-month cycle, packs in the freshest updates to Plasma, Frameworks, and applications, ensuring a smooth, performant desktop experience for millions of users worldwide.

Building on the Ubuntu 25.10 base released today by Canonical, Kubuntu 25.10 introduces Plasma 6.4 as the flagship update, alongside Qt 6.9, KDE Frameworks 6.17.0, and the latest KDE Gear 25.08 suite.

We’ve also upgraded to Linux kernel 6.17 for enhanced hardware support and efficiency. Whether you’re a developer, creator, or everyday user, this release emphasizes Wayland adoption, modern security, and seamless integration with the open source world.

Kubuntu remains completely free to download, use, and share—empowering our global community to innovate without barriers. Download it now from kubuntu.org/getkubuntu

Welcome to a new issue of This Week in Plasma!

This week we released the second beta of Plasma 6.5, and there are a lot of fixes in it! This week also sees some great bug fixes, as well as a number of UI improvements related to language and time.

Notable UI Improvements

Plasma 6.5.0

When you’re using your system in a language that’s not English, you can now find Emojis in the Emoji Selector window by searching for their English names, in addition to the names in your primary language. (Kai Uwe Broulik, link)

Week numbers shown in Plasma’s various calendars have now been italicized to distinguish them from day numbers. (Akseli Lahtinen, link)

Plasma 6.6.0

Made multiple UI improvements to the time zone chooser map that’s visible in a few places: you can now zoom in and out farther, the map zooms in a more predictible way, there’s no more blurry text, and the borders of the clickable areas now perfectly map the borders drawn on the map. (Niccolò Venerandi, link 1, link 2, and link 3)

When using a right-to-left language like Arabic or Hebrew, Plasma will now show reversed versions of the audio icons in various places when the icon theme contains them — and the Breeze icon theme now does. (Farid Abdelnour and Nate Graham, link 1, link 2, link 3, link 4, and link 5)

Notable Bug Fixes

Plasma 6.4.6

Discover’s automatic shutdown/restart feature now allows apps with unsaved changes to prompt you to save first, preventing potential data loss. (Nate Graham and Aleix Pol Gonzalez, link)

Fixed an issue preventing the message about other users being logged in when you try to restart or shut down from appearing. (Nate Graham, link)

Fixed an issue preventing Flatpak apps from being able to create launchers using the Dynamic Launcher portal. (Nicolas Fella, link)

Fixed an issue that made the Applications table on System Monitor’s main page blurry with certain scale factors. (Arjen Hiemstra, link)

Removing the background of widgets in System Monitor now visually adjusts them to the color scheme properly. (Arjen Hiemstra, link)

Timestamps are now shown as expected for print jobs in the print queue. (Mike Noe, link)

The numbers in Plasma’s Timer widget now visually adjust to the color scheme properly. (Marco Martin, link)

When you’ve got Discover set up to prioritize apps from distro repos over Flatpak and/or Snap, searching for apps no longer inappropriately prioritizes the Flatpak or Snap versions. (Akseli Lahtinen, link)

Ampersands now appear correctly in text that shows up in the context menus of Task Manager tasks. (Marco Martin, link)

Fixed an issue that made the Media Player widget display filenames containing certain characters incorrectly. (Conor Smith, link)

Dragging a desktop widget partially off of a screen edge no longer makes the visualization of its position disappear. (Akseli Lahtinen, link)

Plasma 6.5.0

Fixed a case where DIscover could crash while quitting. (Aleix Pol Gonzales, link)

Fixed an issue in Discover that made it sometimes fail to display reviews properly for certain apps. (Akseli Lahtinen, link)

Fixed several issues with the Application Dashboard launcher: now it closes on focus loss like other launchers, doesn’t resize itself inappropriately if it’s open when the screen resolution, scale, or geometry changes, and no longer fails to pre-select items for many types of search results. (Niccolò Venerandi, link 1, link 2, and link 3)

Fixed an issue with the desktop grid view of KWin’s Overview effect that made it not show windows on inactive virtual desktops when using an unrelated non-default option. (Marco Martin, link)

Fixed a few sources of visual glitches when dragging items on the desktop when using a fractional scale factor. (Akseli Lahtinen, link)

If you’ve got a misbehaving screen that connects and disconnects multiple times when plugged in (screens suck), you’ll no longer see multiple system notifications about this. (Kai Uwe Broulik, link)

Using a font with a very tall baseline (for example, with many Arabic fonts) no longer makes text overflow out of the grid items on the Add Widgets sidebar. (Niccolò Venerandi, link)

The Reset button on System Settings’ Date & Time page now resets the current time zone too, if it’s been changed at all. (Niccolò Venerandi, link)

Removed Spectacle’s “Show capture instructions” option, because it didn’t do anything anymore after we removed the giant text field in the rectangular region UI in Plasma 6.4. (Nate Graham, link)

Frameworks 6.19

Fixed a case where Plasma would crash when asked to display certain malformed themes. (Marco Martin, link)

Fixed the “Delete oldest files from the trash” option for how to handle a full trash. (Pan Zhang, link)

Fixed an issue that made it impossible to paste text containing “file:///%E2%80%9D into a Sticky Note widget. (Akseli Lahtinen, link)

Other bug information of note:

• 1 very high priority Plasma bug (down from 2 last week). Current list of bugs
• 28 15-minute Plasma bugs (up from 27 last week). Current list of bugs

Notable in Performance & Technical

Plasma 6.4.6

Fixed an issue that made Plasma consume CPU time for no reason while the Networks widget is visible in the active part of the System Tray, until the first time the System Tray popup is opened. (Fabian Vogt, link)

Plasma 6.5.0

The time that Discover last notified you about updates is now stored in the state config file, not the settings config file. This is part of the meta-project to move rapidly-changing information out of config files so you can version-control them more easily. (Nicolas Fella, link)

Plasma 6.6.0

Old stale config data about ancient panels no longer clutters up your Plasma config file; it’s now deleted as intended. (Nicolas Fella, link)

Slightly improved the speed and memory efficiency of opening the Sticky Note widget’s context menu. (Kai Uwe Broulik, link)

Frameworks 6.19

Fixed an issue that made System Monitor render graphs when not visible, wasting resources. (Arjen Hiemstra, link)

How You Can Help

KDE has become important in the world, and your time and contributions have helped us get there. As we grow, we need your support to keep KDE sustainable.

You can help KDE by becoming an active community member and getting involved somehow. Each contributor makes a huge difference in KDE — you are not a number or a cog in a machine! You don’t have to be a programmer, either; many other opportunities exist, too.

You can also help us by making a donation! A monetary contribution of any size will help us cover operational costs, salaries, travel expenses for contributors, and in general just keep KDE bringing Free Software to the world.

To get a new Plasma feature or a bugfix mentioned here, feel free to push a commit to the relevant merge request on invent.kde.org.

hi so i use kde and i have a few small mouse problems that appear out of nowhere that is so annoying

1: sometimes my left click acts as right click (i think it also does other weird things) and right click does NOTHING (seriously, i tested it)

2: sometimes when i am dragging a window, it dosent stop dragging even tho i stopped holding left click, but sometimes i can stop it from dragging by pressing esc

3: simular as above but for the task bar, when i hover over a app on the task bar very rarely it will automaticly drag it

1 and 2 always happens together, which is weird, and these problems usally happens when my pc isturned on, and randomly happens when i am doing stuff

if you know why this happens, id love to know

ALSO, I AM SURE ITS NOT MY MOUSE CAUSING IT, THESE PROBLEMS ONLY HAPPENS WHEN I AM USING KDE, NOWHERE ELSE

Edit: just realised it was steamos, cuz i switched to cachyos steam deck edition and it fixed it, ugh

accidentally posted this twice, sorry <3

Plasma 6.5 will be officially released on October 21st, but today it enters its final testing phase.

https://kde.org/announcements/changelogs/plasma/6/6.4.90-6.4.91/

If you have a spare machine and want to help improve it, grab it and help us squash some bugs.

WARNING: This is Beta software and not considered stable for everyday use.

My touchpad often runs out of physical surface when, say, I want to drag'n'drop a file. When my finger reaches the side of the touchpad before the mouse pointer gets to where it should be I have to cancel and start again with more momentum. In Windows when this happens and I don't lift my finger the mouse pointer continues to travel slowly in the same direction. In case I missed it, is there a setting in KDE Plasma 6 enabling that behaviour?

Another touchpad feature I am missing is the Back (as in browser Back) functionality I get in Windows when I tap the bottom left corner. Is that possible?

That's on a Lenovo Thinkpad X1 with Debian Trixie and KDE Plasma.

EDIT: I just discovered KDE Plasma 6 has a setting called 'Tap-and-drag lock'. If you lift your finger and quickly reposition you can continue dragging. That's the most intuitive method, and more elegant than Windows.

Plasma improves accessibility for colorblind users, you can set up slideshow wallpapers easier, and enjoy a more modern Add Connection dialog.

Plus tons of other stuff...

I was recently using Gnome with Pop OS and decided to switch to CachyOS with KDE, as I had seen that it was one of the best in terms of customization. But when using KDE, I realized that I was missing something that Pop OS implemented by default, which was the tiling system

So I decided to do some research and see if I could implement a solution that would suit my workflow, and that's how “Fluid tile” was born

Fluid tile is a script for kwin that manages windows by adapting to the custom mosaic (Super + T). You can also configure it to your liking:

• Maximize or not maximize the window when it opens

• Maximize or not maximize the last window on the virtual desktop when it closes

• Automatically create new virtual desktops

• Remove empty virtual desktops

• Blacklist apps that you don't want the script to apply to

I'd like you to take a look and tell me what you think or any bugs you find. Thank you

WORKFLOW (How it works)

When a window is opened, it is expanded by default, if another window is opened and there is space the new window is moved to the widest layout, If there are other layouts with the same size, the one closest to the top left corner of the desktop will take priority. When a window is closing, If only one window remains on the desktop, It will be expanded. Finally, if the desktop is empty, remove the desktop.

Example

If you still observe issues, ping me on mastodo carl@kde.social

like to automatically open and put an application

cross-posted from: https://lemmy.kde.social/post/4473608

Grab the ISO, install it on your second computer (or vm) and help us make it the best Linux distro for everyone!

https://kde.org/linux

Harald Sitter, project leader, is speaking about KDE Linux at this very instant at Akademy:

https://tube.kockatoo.org/w/rcbiuoaaQnpveHbZjT3PsX