KDE (K Desktop Environment) is a Qt-based desktop environment as well as a suite of cross-platform desktop applications. Its latest desktop environment is KDE Plasma 5.

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(K)Ubuntu 16.04 Plasma 5.5.5 takes long time at login

My new installed Kubuntu 16.04 with Plasma 5.5.5 takes very long time at login(~30s). I read about a similar bug https://bugs.launchpad.net/ubuntu/+source/plasma-nm/+bug/1509334 , but I don't think ...
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12 views

Turn off or disable the guest account in kUbuntu using KDE system settings GUI

How do I turn off or disable the guest account in kUbuntu using the KDE GUI?
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18 views

Plasma 5 Fonts Not Working

I recently upgraded to Ubuntu 16.04 and installed the kubuntu-desktop package in order to take advantage of KDE5. However, the fonts and similar visual systems are completely refusing to work, even ...
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14 views

How do i find all clipboards on ubuntu and kUbuntu

I posted the following security concern in the security.stackexchange: kde system tray clipboard Note: This post is asking a different question. In response to finding that when I use the program ...
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8 views

Why have I only two avtivities types on Plasma 5?

After installing kubuntu 16.04 I have only two activities types in Plasma: desktop and folder view. Why? Is something missing in the system?
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16 views

Where is the location of the keyboard input locale icons?

See the dark blue EN icon. The icon will change depending on the input you use and your keyboard config. I'd just like to know where these icons are located.
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349 views

Help installing kubuntu-desktop on Ubuntu 16.04

Well, the problem is that I'm trying to install KDE alongside Unity on Ubuntu 16.04. I'm using the command sudo apt-get install kubuntu-desktop* kdm* but I'm not sure if this is correct. If it isn't, ...
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17 views

How can I hide and protect devices in Dolphin (and other places in KDE)?

On most KDE file open dialogues and Dolphin, my devices (mounted and otherwise) are displayed as options. Clicking these convenient takes you to their mounted path (and mounts them first if they ...
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34 views

Wrong keyboard layouts

I want to be able to switch my keyboard layout between German and English (UK). As default I set it system-wide to English (UK, extended WinKeys), using sudo dpkg-reconfigure keyboard-configuration ...
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23 views

How to get an uniform look for Qt and GTK applications in xenial

Since I upgraded to xenial all the applications but the ones using Qt4 look uniform. For some reason the Qt4 applications like SpeedCrunch or Okular use the Plastique theme by default. The Plastique ...
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15 views

How to copy files from one directory to another after closing the Dolphin file manager in Kubuntu 16.04 LTS?

Please, I need your help with the following: The Problem: I can't copy/move one file (or more) from one directory to another unless if both directories are opened using the file manager. In other ...
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13 views

kwallet + gpg kubntu

I've installed kubuntu 16.04 and create gpg key. But when I try to create a new wallet with kwallet it can't find no one encryption key. I tried to create pair of keys with gpg and kgpg, in both cases ...
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42 views

Visual changes of the applications with root in Kubuntu 15.10/16.04

The problem is: when I start apps in Kubuntu with sudo or kdesudo, these apps change their visual themes and some of them are displayed with issues. As an example: Dolphin in normal mode: Dolphin ...
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1answer
20 views

KDM accepting username and password but doesn't load desktop

I installed kde with sudo apt-get install kde-full on my ubuntu 14.04 desktop, then I got a warning about running out of space (I can't remember it exactly) and kde was still installing so I killed ...
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1answer
52 views

Alternative for the 'system settings' application?

Is there a "good" alternative application for the system settings application that comes with Ubuntu? I mean I know that KDE and gnome come with their alternatives, but I would like to have one ...
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34 views

Will installing kdeconnect-plasma in 16.04 come in conflict with an existing installation of kdeconnect?

Currently on Ubuntu 14.04 I installed kdeconnect 0.8 from a ppa, because 14.04 only has the 0.7 release packaged (https://launchpad.net/ubuntu/+source/kdeconnect). After upgrading to Ubuntu 16.04 I'd ...
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1answer
132 views

How to move, resize or remove KDE widgets since Plasma 5.5.5 (xenial) [duplicate]

Until Plasma 5.4.2 (wily) widgets could be unlocked and showed a side menu when hovering over them with the mouse. The side menu allowed moving, resizing and removing the widget. With Plasma 5.5.5 ...
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127 views

How to resize a Folder View widget on the desktop?

It's surely my fault, but I am not able to resize the folder view widgets I've put on the desktop. In the previous release (14.04, KDE 4) the folder view widgets all had auto-appearing hanldes for ...
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178 views

Kubuntu shows black screen after upgrading to 16.04

I upgraded my Kubuntu 15.10 machine to 16.04 yesterday. Everything was working fine. Today, I did a reboot. Upon logging in, my desktop doesn't show so I have a blank black screen. Thankfully, Plank ...
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51 views

Installing KDE in Ubuntu GNOME 15.10

I'm trying to install KDE on Ubuntu GNOME 15.10, but I cannot get it to work. I'm trying to install it through the command line, using sudo apt-get install kubuntu-desktop but it doesn't work. It ...
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10 views

Black stripes in screen

I have a problem with my raspberry pi 2B, when I hooked it up with a hdmi to dvi converter to a DVI screen it worked flawlessly for about 2 and a half hours, since then I have been randomly gettings ...
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19 views

Plasma device notifier failing to start (kdeinit/kioexec)

When I plug in a USB storage device, I try to double-click it in the device notifier that comes up in my tray, but all I get is messages like: Examining: Finished // mtp:// blah blah blah /ALCATEL ...
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21 views

Kubuntu 15.10 - Session save doesn't work

This machine was originally installed with Kubuntu 14.10. Then I upgraded to 15.04, and since then it fails to properly restore my previous session. I recently upgraded to Kubuntu 15.10, hoping to fix ...
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20 views

I can't download new Plasma widgets and Plasma themes in Kubuntu 15.10

Each time I try to download the new Plasma widget from the Plasma Add-On Installer, I get the following error: Loading of providers from file: http://download.kde.org/ocs/providers.xml failed ...
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28 views

How to fix the problem of drop-down menus being transparent and not readable in Kubuntu 15.10

The Problem: The task manager dropdown menus are all transparent and not readable at all. The same goes for all the dropdown menus of libre office. I have tried to change the desktop theme but the ...
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116 views

How to deactivate all the desktop effects of KDE permanently?

I am aware that the shortcode of "Shift + Alt + F12" disables all the desktop effects of Kubuntu 15.10. However, is there a way to disable all those effects automatically and permanently in every ...
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23 views

Power management dies after suspend in Kubuntu 15.10

Ever since I upgraded to Kubuntu 15.10 from 14.10 power management dies after waking up from suspend (to disk or ram). The only thing that still works is dim display but it won't even un-dim. Screen ...
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6 views

Graphical effect disappeared on kde4

Afternoon I had to reinstall xorg for some problems with the nvidia driver. Now all the effects are enabled (for example flickering windows) but do not work. and now all without as animations .. do I ...
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1answer
14 views

Accidentally killed plasma

I accidentally pressed ctrl + alt + esc, clicking on the process in the task manager, but it didnt work, and it selected the whole plasma desktop and got killed, is there a quick fix to start up ...
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12 views

KDE + VNC under Amazon EC2?

Starting with a 14.04LTS AMI, what are the magic incantations to get a remote desktop, preferably KDE? I tried the obvious: apt-get install kubuntu-desktop apt-get install tightvncserver ...
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2answers
75 views

KDE 5 - How to easily switch between audio outputs?

I currently have KDE 5 Plasma installed which I like a lot. However, it is not possible to easily switch between Audio outputs from One Soundcard (SPDIF and analog) like it was possible in Unity. Is ...
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20 views

Audio mute button not working in KDE Plasma 5 Kubuntu 15.10

How do I get the audio mute button on my keyboard to work on Kubuntu 15.10? I read somewhere that changing global shortcuts for KMix in Global shortcut settings would work, but I couldn't find KMix in ...
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Akonadi/ Kmail is broken cannot get my POP3 messages/ accounts

Today kmail stopped working and I get the following while running akonadictl start: Starting Akonadi Server... Unable to register service as "org.freedesktop.Akonadi.Control.lock" Maybe it's already ...
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70 views

Screen Goes Blank After Boot

Once I start my computer Ubuntu starts to boot by showing the splash screen. Then once the splash screen goes away the login screen appears, but then quickly goes blank. I uploaded a YouTube video ...
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19 views

Firefox opens downloaded files with default app for Gnome instead of KDE which I am running

I am running Kubuntu 15.10 with KDE Plasma5. While I am running Firefox and open a file downloaded from there, it opens using the default application set in Gnome and not the ones configured for ...
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52 views

Help understanding and debugging slow boot with systemd network-online.target

I've spent some time on google, but I don't want a quick fix here, I want to understand what is going on. I have a desktop which boots to Windows in 3 seconds, and booted older ubuntu's in under 10, ...
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25 views

Change font size of all BasKet notes at once

I would like to know how to change the font size of ALL BasKet notes at once. Selecting all notes in one basket makes the font toolbar grayed out, so this does not work.
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1answer
60 views

Installing Unity alongside kde

I am running kubuntu 15.10 32-bit for a while, and although I love the kde enviroment, I would like the option of having unity. So, I did the following: sudo apt-get update sudo apt-get ...
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1answer
58 views

KDE login/logout issues in Kubuntu 15.10

I'm running a fresh Kubuntu installation on a new computer. Everything runs smooth except logging in and out of KDE. The problem could be divided into two parts: About 40% of the time, KDE won't ...
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8 views

KDE Login screen for 2 monitor

I'm wondering if is possible to remove one of the login screens under Kubuntu 15.10, I'm working with kubuntu and 2 monitors, and each time when I start my PC both monitor are showing the login window ...
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1answer
22 views

A shortcut to present all windows and jump to one of them with a key

Is there a feature that present the "present all windows" screen or something similar and puts letters on the windows like 'alt' does for menu so you can jump to the desired window with just the ...
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104 views

KDE Plasma can't install. Help me

When try to install KDE Plasma (Kubuntu Desktop) on Ubuntu 15.10 using sudo apt-get install kubuntu-desktop Then this error comming, Reading package lists... Done Building dependency tree ...
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1answer
19 views

Backup of Akonadi: What makes sense?

At https://wiki.ubuntuusers.de/Datensicherung/#4-was-zu-sichern-sich-nicht-lohnt (in German unfortunately) it says that it does not pay off to backup ~/.local/share/akonadi. Why is that? What should I ...
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1answer
32 views

Black screen with movable mouse in Kubuntu 15.10 KDE - How do i fix it?

I accidentally moved my unstable power coord connected to my monitor (It gets disconnected easily) and couldnt get the power coord to fit in rightly, so i had to force restart my computer (cause i ...
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1answer
31 views

How to deal with forgotten password without loosing any data from ubuntu based laptop? [duplicate]

When I logged in today on my laptop and tried to do something it asked me for my password. So i typed in my password and it keeps on saying that It's invalid. I know for sure I didn't change it. Is ...
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9 views

KDE Window Preview font breaks after a while

I am running Kubuntu 15.10 with KDE 5.4.2 and after running for some time, the font in the little preview window that appears when hovering the mouse over the taskbar starts to break with certain ...
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88 views

How do I get firefox do use the numix theme again?

I normally use Ubuntu 15.10 with the numix theme, the typical black style with red menus along with circle icons. I recently tried kde plasma(because for whatever reason it was installed on my ...
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65 views

Help Getting KDE to work

Basically I've used many flavors of Linux over the years, I just got a System 76 with the default Ubuntu installed on it. I've been a fan of KDE and Debian for many years now, so this distro isn't ...
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43 views

KDE color scheme is not applying

I installed kubuntu-desktop and color themes are not working. When I change for example from Breeze to Breeze Dark in Color section in the settings nothing except title bar color seems to change. ...
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20 views

Can't click on anything on my Kubuntu 15.04

I have a problem with Kubuntu 15.04. I am not able to click on anything in control panel. Sometimes the whole KDE just freezes so I can't click on anything. Could someone please help to find a ...