The official Ubuntu derivative using the KDE Plasma Desktop

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Nvidia ASUS Strix gtx960 Kubuntu 14.04: screen tear and ghosting.

Background: I'm having issues with the Nvidia ASUS Strix GTX960. I am using Kubuntu 14.04. I just built a brand new system, upgrading from my laptop with AMD HD radeon. I had K 14.04 on that build ...
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12 views

Kubuntu 15.04 - how to use Intel HD graphics drivers?

I've been a Ubuntu user for many years now. Tonight, I decided to try out Kubuntu 15.04. I have noticed that Kubuntu uses the Nouveau drivers by default. This results in tearing and "wave-iness" on ...
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Kubuntu 15.04 File Open Dialog is not working

Once I try to open file in some editor or project in IDE, for instance file in Kate or project in QtCreator, the File open dialog shows up, but whatever location I click (home, root, mounted disks, ...
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Kubuntu 15.04 Clipboard is behaving strangely

Ever since updating to Kubuntu 15.04, my clipboard hasn't been working properly. Sometimes when quickly trying to copy and paste an URL it doesn't copy and I end up accidentally pasting the last thing ...
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14 views

Kubuntu panel freezes

We are using Kubuntu 14.04 for all PC's in our firm. Nowadays we are facing an issue that while working the panel freezes. Almost every PC's facing this issue. The load is normal. Please provide a ...
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1answer
10 views

xrandr settings changed. Display now won't run

I was trying to use xrandr to have a script to adjust my monitor resolution. As a test I ran xrandr -s 1360x768 This should be a valid setting. It killed the xserver. I changed to tty6 tried ...
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1answer
37 views

Getting started with iPython notebook

Please don't consider this a duplicate. I have seen a similar post and the recommended solution has not solved my issue. I need input for I can't find a solution elsewhere and iPython does not seem ...
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1answer
14 views

I downloaded Kubuntu 15.04 onto my computer

I am (running Windows XP) now it is sitting in an ISO file on my computer. When I try to open it a window comes up that says "Windows cannot open this file" Not sure where to go from here. This is my ...
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1answer
9 views

Why do some Poedit hotkeys not work on Kubuntu (e.g. Ctrl+Enter)?

I installed Poedit on my Kubuntu 14.10 and some keyboard shortcuts do not work. Most noteably the most important shortcut Ctrl+Enter to go to the next item does not work. Also Ctrl+Up/Down does not ...
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22 views

Cannot Connect to wireless in Kubuntu 14.04

I recently installed Kubuntu 14.04 on my old Dell Latitude D630 that used to run Windows XP and the installation went fine. I ran the 'lshw' command and it showed that my WiFi adapter was recognized ...
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16 views

Trouble Connecting to Wifi on Kubuntu 14.04.02

I just installed Kubuntu version 14.04.02 on my Dell Latitude D630. The installation went fine, but I can't get it to connect to Wifi (or even turn it on for that matter) or bring up a list of ...
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19 views

Bumblebee not switching card off

I am running Kubuntu 14.04.2 x86-64 on a ASUS Q551L. I have a Nvidia GeForce 840m that I am running the 352 driver from Nvidia. I am using bumblebee to switch between the two graphics cards. I can use ...
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17 views

LibreOffice menu items: missing icons and highlight

Some menu items are missing the icon, but instead a rough checkbox-like style icon is displayed. Menu items are not highlighted when mouse is over. The same for some contextual menus. This is ...
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12 views

Ubuntu and Ethernet problems?

I'm using Kubuntu 15.04 on an HP Pavilion dv3-2003tu. Recently I switched my hard drive to a new one that still contains Kubuntu and what I'm wondering is why Kubuntu can't connect to my ethernet ...
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16 views

Can't install icon theme KDE plasma 5

I have been trying to install a icon theme. The problem is when selecting the achieve or the index I get The file is not a valid icon theme archive. both of these 1 and 2 should work but they do not ...
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9 views

Unlocking at boot time Luks LVM

This is my first question, but let me start by saying how much of a big fan I am up this site. Every question I ever had over the last 4 years has been answered here and I am so grateful for the help ...
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1answer
16 views

Kubuntu: Change proxy settings from console

I want to change proxy in whole system. I am using Kubuntu 14.04 64bit. I know that should change proxy variables like http_proxy="http://proxy.xxx.xx:80XX/" etc. But it will not change proxy in KDE ...
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42 views

Kubuntu 15.04 vivid - Nvidia GTX 660M (Optimus again)

I'm really sorry that I pull this topic again but "I still haven't found what I'm looking for...". I've tried tons of solutions with several behaviors, and I can't get it work properly. First of all ...
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1answer
37 views

On which device do I install the bootloader when I want to dual boot?

I'm currently trying to install Kubuntu 15.04 alongside Windows 8.1 (already installed). It's on a non-UEFI machine. My partitions are as follows: sda1 windows installation (500GB SSD) sdb1 HDD ...
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10 views

Kubuntu 15.04 installation hanged

trying to install kubuntu 15.04 x64 on one of my laptops, after choosing disk space and time zone, the continue button is blocked. I looked everywhere, it's been like this for 20 minutes, there is no ...
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10 views

How to upgrade to KDE 4.14

I am running KDE on top of Ubuntu 14.04LTS. The KDE version is 4.13.3 . I want to update it to 4.14 . I added the Kubuntu Backport PPA and did. sudo add-apt-repository ppa:kubuntu-ppa/backports sudo ...
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26 views

kubuntu 15.04 no sound - nvidia 970

My issue is very similar to this item: Xubuntu 15.04, no sound through HDMI but a bit different. Using a pair of nvidia 970 with an asrock exctreme6 MB. Sound output through display port to ...
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1answer
17 views

Kubuntu 15.04 - Mouse fails to drag-and-drop or select properly

I just installed Kubuntu 15.04 and I'm facing a weird mouse issue. Sometimes when I try to drag and drop a file/window or select some text my mouse looses control, (e.g. if I try to move a window it ...
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6 views

Audio Switching to Mono after a while

I'm running kubuntu 15.04 - for a few days now, the audio swithches to mono after 48h or so after a reboot. A reboot fixes the issue. Using pavucontrol, output devices, headphones (actually ...
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12 views

Applications unreliably gaining focus on mouse click in Kubuntu 15.04

I recently upgraded to Kunbutu 15.04 and am having a problem where windows are not reliably gaining focus when I click on them. For instance, when switching to using PyDev, I often need to click ...
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22 views

Kubuntu freezing on startup logo

I chose recovery option in Grub and it gets far enough that I can drop down to terminal and move around. I can't get the desktop to load no matter what I do. I've tried to edit xorg.config and it ...
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28 views

Blackscreen with only mouse pointer after switching to Ubuntu desktop from Kubuntu on 15.04

After upgrading to Kubuntu 15.04, I am having a lot of problems. On reboot, it was stuck at Kubuntu logo (it keeps on glowing) but nothing happens. On switching to Recovery mode, I was getting "Error ...
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43 views

Installing Ubuntu on an Asus K501LX

I'm having an incredible amount of trouble installing Ubuntu on an Asus K501LX. I'm booting from a USB drive, created by usb-creator-gtk. I've attempted Ubuntu 14.04 and 15.04, as well as Kubuntu ...
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23 views

Really slow ssd performance

So I installed Kubuntu 15.04 on a samsung 840 evo ssd, the system works fine but I did a test to see the speed of the ssd. hdparm -t /dev/sdb gives me about 30MB/s, when it is supposed to give me ...
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5 views

How to enable Multimedia keys with Clementine in Kubuntu 14.04

I have a desktop computer with Kubuntu 14.04.2 installed. Multimedia keys work fine with Amarok and VLC, but not in Clementine. I did go to the Celmentine preferences and set the MMkeys to the ...
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7 views

Kubuntu host has no Ethernet, but Windows running on a VM Does

I have a Dell Latitude that I use for work, requiring me to run Windows. I've opted for Kubuntu and VMWare. I have the strange situation in which I can no longer connect to the internet (ping 8.8.8.8 ...
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1answer
101 views

Problem with wifi on kubuntu 15.04 with Realtek rtl8192cu USB dongle

I've recently installed 64bit version of kubuntu and science then I've been having issue with wifi. It work great for few minutes and then it disconnects but it shows that I am connected and I have to ...
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1answer
46 views

Can't install Skype or update in Kubuntu 15.04

I am rather new to Linux, so I figured I would start "easy" with Kubuntu. My issue was immediate that Skype would not install. It is not in Muon Discover (software center) and adding the repo to ...
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81 views

FFmpeg - Unknown encoder 'libx264'

I'm trying to make FFmpeg stream using h.264 (like in this example) sudo ffmpeg -f x11grab -framerate 30 -video_size 1280x720 -i :0.0+0,0 / -vcodec libx264 -pre veryfast -maxrate 1984k -bufsize 3968k ...
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40 views

virtualbox shared folder - kernel headers not found

I have read those questions: Why can't I access a shared folder from within my Virtualbox machine? and Error: kernel headers not found. (But they are in place) The second question equals mine, ...
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78 views

How to properly set up fcitx on Kubuntu 15.04?

I need help setting up fcitx on my Kubuntu 15.04 to write in Japanese. I first installed fcitx with apt. I forgot the package names I installed over the experimentations, but here is what's ...
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27 views

kubuntu 15.04 lagging problem along with more power consumption

I have installed Kubuntu 15.04 on my dell inspiron 5520 (64 bit) . But when every time I open facebook in Firefox or Chromium after some time my laptop is not responding for 20 to 24 minutes.Also ...
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9 views

Deleted files still show in KDE5 launcher in Kubuntu 15.04

I am having some trouble. I deleted some files, but it still shows up when I search it in the KDE5 launcher in Kubuntu 15.04. How can I fix this?
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1answer
76 views

How to complete installation of flash plugin?

I recently received an upgrade for the flash plugin through the package manager. I've installed it. Flash then requires a reboot and running a post installation step. I've been having trouble with ...
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1answer
20 views

Can't vt Switch in Kubuntu 15.04

I'm trying to use the ctrl+alt+n (1-6) to switch to a terminal in Kubuntu 15.04 but it doesn't work. Nothing happens. When I run ps au | grep tty this is what I see. root 1141 0.3 0.7 200760 ...
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14 views

Encrypted LVM Disk Password not “in box”

After a recent installation of Kubuntu 15.04 using encrypted LVM, I have the following problem. When I boot the system, the pretty Kubuntu encrypted disk password screen appears, but when I type the ...
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2answers
52 views

steam fails to start

I have Kubuntu 15.04 on Linux work002 3.19.0-22-generic #22-Ubuntu SMP Tue Jun 16 17:15:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux kernel. When I try to run steam from terminal, I get following error: ...
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1answer
17 views

How can I collaps the icons of running applications?

My system tray looks like this: before I think it would just organize all windows from the applications in a collapsed way, i.e., that Firefox has one icon, if you click on it you get to see how ...
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18 views

Disable desktop switching with the scroll wheel in Kubuntu?

Just want to turn off the function when I scroll I swap desktop. I have removed the function in Desktop(right click) > Folder Settings > Mouse Actions > Vertical-Scroll > Switch Desktop ...
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26 views

Customize Kubuntu task bar

I just installed Kubuntu 15.04 the first time here. I don't know the correct name of Kubuntu's "Task bar" but there is something about it that drives me nuts. I moved the Task Bar to the left of my ...
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9 views

Kmail2 in Kubuntu Plasma 2 slows down with the receipt of new emails

I am using Kubuntu 15.04 and using Kmail2 as my default email client. Recently I found that while accessing my new mails in the inbox most of the times in the message window it shows 'Retrieving ...
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42 views

How do I install Plasma Desktop on Ubuntu 15.04?

Anyone can show me how to install Plasma Desktop on Ubuntu 15.04, I've tried one method and it works for a moment, but after few minutes I have obtain errors in Unity and in Plasma and more that.. In ...
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102 views

Kubuntu 15.04 desktop freezes after short time

BACKGROUND: I am a new Kubuntu user and I have installed Kubuntu 15.04 on my system for the first time. The installation completed without error and I can boot into a working system. Here are my ...
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1answer
36 views

Ubuntu SDK on Kubuntu

I plan to switch from Windows to Linux long term. I just installed my first Kubuntu (since I like Qt) system in a VirtualBox VM hosted in Windows to get familiar with that system (and Linux in ...
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1answer
18 views

KDE Hotkey-Volumecontrol stopped working

After installing a fresh Kubuntu (15.04) the hotkeys for volume-control were working out of the box. (Also making some nice "blob"-sound when I used them) I had to install a few codecs and other ...