The official Ubuntu derivative using the KDE Plasma Desktop

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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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5 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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6 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
12 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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25 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
30 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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6 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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7 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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16 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
14 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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10 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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18 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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0answers
19 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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31 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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21 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
73 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 ...
2
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1answer
36 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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77 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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35 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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66 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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8 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
70 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
12 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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13 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
45 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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17 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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20 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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0answers
34 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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0answers
87 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
33 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
17 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 ...
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25 views

Visual tool for browsing LMDB files

I am looking for a program that works on Kubuntu and can open and display an LMDB file (Lightning Memory-Mapped Database). Ideally, gratis, can also edit the file, and supports large files, like ...
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53 views

How do I install KDE on Ubuntu 15.04?

I am trying to install KDE on Ubuntu 15.04. I ran sudo apt-get install kubuntu-desktop and got this output: http://paste.ubuntu.com/11858746/. I ran sudo apt-get -f install and got this output: ...
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34 views

15.04 USB Camera connection detection stopped working

After an upgrade to Kubuntu 15.04, now camera not detected as an attached device (same bug as in as 13.04?). FujiFinepix camera lsusb : Bus 001 Device 013: ID 04cb:01e8 Fuji Photo Film Co., Ltd
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0answers
13 views

Disabling fading effect in windows' titles in the default task manager

Windows' titles are faded in the built-in task manager: How to disable this fading effect? I use Kubuntu 14.10 Plasma 4.
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1answer
22 views

Is there a Kubuntu theme available to make it look like Windows 2000?

Is there a Kubuntu theme available to make it look like Windows 2000? I am aware of Is there an Ubuntu theme available to make it look like Windows 7?, but I prefer the Microsoft Windows 2000 ...
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0answers
63 views

trouble while installing kubuntu 15.04 with wubi installer on windows 7

![enter image description here][1]Hello , I am trying to in install kubuntu 15.04 with wubi installer, but it started downloading UBUNTU-14.1-Desktop-amd64.iso.torrent, nd taking time approximately 7 ...
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0answers
72 views

Nvidia driver crashes and kernel errors on fresh install of Kubuntu 15.04

I have an MSI GE70 2OE-071US laptop, with Optimus and an Nvidia GeForce GTX765M graphics card. On Kubuntu 14.10, I was once able to run CUDA using Bumblebee with reasonable reproducibility. On Kubuntu ...
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0answers
59 views

Kubuntu 15.04: kquitapp plasma-desktop does not work - why?

Why does kquitapp plasma-desktop result in the following error message? ~$ kquitapp plasma-desktop kquitapp(14021): "Application plasma-desktop could not be found using service org.kde.plasma-desktop ...
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12 views

Kubuntu 15.04: how to quickly test QML file changes in a plasma panel widget?

I am making changes to the QML files in ~/.local/share/plasma/plasmoids/org.kde.plasma.digitalclock/. What is a quick way of testing my changes? Currently, I have to re-add the widget to the panel ...
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109 views

Kubuntu 15.04: bluedevil installed and working, but Bluetooth icons missing from System Settings and system tray

When I manually launch bluedevil-monolithic, the system tray icon appears and works well to configure and connect to bluetooth devices. However, the bluetooth icon does not appear in the system tray ...
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40 views

No sound - Skype 4.3 KUbuntu 14.10

After upgrading to 14.04 I lost sound in Skype. Tried many things suggested on different forums etc. but nothing worked. So I upgraded to 14.10 hoping this will resolve this issue, but alas it didn't. ...
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2answers
22 views

kubuntu / Windows xp partition- want to upgrade to windows 7 but keep kbuntu

I have dual boot: Windows XP and Kubuntu. I want to upgrade to windows 7 but naturally want to keep Kubuntu. If i do a clean installation of windows 7 will that delete the Kubuntu partitions on my HD ...
0
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1answer
22 views

Qt Creator fails in designer tab

Qt Creator in designer tab displays black frames. At the same time in Konsole I have the following message several times (more than 30 times): QQuickWidget cannot be used as a native child widget. ...