The official Ubuntu derivative using the KDE Plasma Desktop

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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
10 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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1answer
26 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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0answers
20 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
18 views

How to set kate's vi mode to show absolute line numbers?

I've started using Plasma5 and I have an issue with Kate's Vi mode. When showing the line numbers on the border it always shows relative line numbers instead of absolute ones, while this didn't happen ...
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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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2answers
216 views

Errors encountered when installing kubuntu on 15.04

I ran: sudo add-apt-repository ppa:kubuntu-ppa/backports sudo apt-get update sudo apt-get install kubuntu-desktop and after it gave me this error message: dpkg: error processing archive ...
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3answers
7k views

How to turn off screen (DPMS) together with locking session in KDE?

First of all, I'm aware a similar question for GNOME is asked here: "Switch off laptop backlight when locking screen". Objective I would like to turn off my screen on locking the session for power ...
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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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1answer
3k views

Kubuntu UEFI Dual Boot with Windows 7 failed at installing Grub-efi

I want to install Kubuntu 13.04 together with Windows 7 in UEFI Mode. I installed Windows 7 first, which created the EFI boot partition. When it come to installing Kubuntu, the installation failed ...
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1answer
7k views

Problems when try to remove KDE Plasma from ubuntu 14.04

I have some problems when I try to remove KDE Plasma from Ubuntu 14.04. I installed KDE Plasma using this command sudo apt-get update sudo apt-get install kubuntu-desktop After doing some changes ...
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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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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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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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24 views

Can't navigate folders on Plasma5

I just updated to Kubuntu 15.04 running Plasma 5 and a very strange bug happened. From time to time, I can't navigate folders inside an application. When I do an "Open File for example" it will show ...
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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
4k views

How can I troubleshoot why Ubuntu keeps crashing on my laptop?

I have a one year old Acer Aspire 4752G netbook running Kubuntu 12.04 LTS with all the latest distribution updates installed. It was previously running great until about a week ago when it suddenly ...
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9 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

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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1answer
11 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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76 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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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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1answer
1k views

KDE Plasma 5 Missing Removable Devices Option

I have upgraded my Kubuntu from 14.10 to 15.04 via Package-Manager. Now, Plasma 5 is used. But with Plasma 5, I am missing some functions: e.g. Removable Devices in System-Settings. (I used this to ...
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3answers
576 views

Controlling Bluetooth mouse gestures that register keyboard events

tl;dr I just bought a Logitech T630. It's a Bluetooth mouse that supports several keyboard events via gestures (PDF). These gestures are fine and dandy but I have little use for them. I'm having a ...
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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
68 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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65 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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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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34 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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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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5answers
4k views

Play video files in a local Lan folder with KDE

I'm trying to play video files in a LAN network folder from within dolphin. These are Samba folders which I can access, delete files and write and copy from. The same video files play perfectly with ...
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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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2answers
4k views

How to configure KDE default settings for a new user of a group?

I'm a sys admin on Kubuntu 11.10 machine. Where do I configure the basic config for a new user (say belonging to group "users")? Edit 1: I want to configure langauages - currently my new users get ...
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33 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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1answer
595 views

Kubuntu desktop icons disappearing on reboot

I recently installed Kubuntu 14.04. I have the desktop layout set as Folder View and everything is fine, but sometimes when I reboot it shows this: So all I can see is a scrollbar and no icons. If ...
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12 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
16 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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0answers
58 views

Kubuntu 15.04 lock screen delayed after waking up

How to get rid of this? When I close the laptop lid, it suspends. But then, I open it, hit the power button to resume it, and I see my desktop (wow much secure). It is unresponsive, I can't click ...
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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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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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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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82 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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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 ...