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Go to: System Settings On the bottom under "System Administration" click "Login Screen (LightDM)" Click the "General" tab Uncheck "Allow guest login" Click "Apply" Note: The following are good related post on turning off or disabling guest accounts: How do I disable the guest session? Removing Guest Session at login in Ubuntu 14.04


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I'm using the command sudo apt-get install kubuntu-desktop* kdm* You should provide specific packages. If it wouldn't help, try following: sudo apt-get autoremove -y sudo apt-get remove --purge kde-telepathy-minimal sudo apt-get remove --purge kde-telepathy And run install again. If you will face it again, do following "Unmet ...


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I disabled the File to activity linking plugin service by going into Dolphin's Control -> Configure Dolphin and in the Services Tab, now the error is gone.


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The settings that worked best for me in this situation on Nvidia 970m closed drivers in 14.04 Kubuntu. Go to Settings -> Desktop Effects -> Advanced Tab Change -> compositing type -> Open GL 3.1 Change -> Qt Graphics System -> native Change -> Scale Method -> Accurate Change -> Tearing Prevention(VSync) -> Full Scene repaints ...


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kUBUNTU 16.04. Same problem, when i disconnect a monitor and reconnect again or when i change to shell(CTRL+ALT+F1) and go back to graphical interface (CTRL+ALT+F7). Safe way. 1-Close all gtk applications. 2-Go to systemsettings --> Applications Style --> Style GNOME(GTK) ---> Change font size or change font to any different of default(Noto Sans), use ...


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It seems that this user-interface aspect is being redesigned at the moment. There is a blog post that is describing the problem, proposing a solution, and requesting feedback. Do check it out here: http://davidrosca.blogspot.ca/2016/04/audio-volume-improvements-in-plasma-57.html


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After researching this topic, it seems that the problem was related to my clipboard manager itself. My clipboard manager was not running at all. Make sure to set your clipboard manager to autorun with your OS. In Kubuntu, the recommended clipboard manager is "Klipper".


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Ok - this is a late answer and the ones already given cover most cases. But I want to add that sometimes the impression that icons do not appear stem from kdenlive's compact and expanded modes of showing tracks. In the compact mode it does not show icons. Like that: It might be the default in your case - you're not seeing the familiar icons because it is ...


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Running sudo unity-control-center seems to show all icons. There is a problem with this, though: no devices are listed in the Sound settings.


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As KDE 5 seems to be just frontend for PulseAudio, you can use direct access to PulseAudio with pactl command. You will have to experiment a little bit to find a correct settings for you exact setup, but I would recommend excellent Arch Linux wiki on Pulse Audio, the Pulse Audio Configuration and Examples. After figuring the correct commands, create a ...


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The problem was that kscreen got uninstalled somehow. I reinstalled it and the problem was fixed.


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KDE is huge, so it's not very surprising that you ran out of space. Next time, though, try to resolve before you reboot. It can save you a lot of headache. Follow these steps to restore normal Unity. Enter a TTY by pressing Ctrl + Alt + F1. Log in with your username and password. Run sudo apt-get purge kde-* kubuntu-*. Run sudo apt-get install --reinstall ...


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With Plasma 5.5.5 the menu appears after a long left-click (instead of hovering with the mouse in Plasma 5.4.2). This can be changed back in Desktop Settings (right click on desktop) -> Tweaks -> Widget Handling. This solution was first posted on bugs.kde.org.


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Found! You need to click and hold into a widget in order to have the handles appearing. It's quite different from KDE4 where the handles appeared by hovering the pointer on one side of the the widget!


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Head to System Settings > Workspace Theme > Desktop Theme > Theme Choose style you like, Oxygen seems to be darkest


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As it sometimes happens, taking the time to formulate a question in writing can give one ideas. It came to me I might take a look at what powertop says when power management doesn't work and it does show (after sleep) that power saving is off for wifi (probably not significant) and also that USB auto-suspend is off for the 3G modem so it's active 100% of the ...


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Head to System Settings > Display and Monitor > Compositor Remove ✔ mark from Enable compositor on startup When this is done, make reboot.


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This can be done from: System Settings > Workspace Appearance and Behaviour > Desktop Effects > General > Activation A screenshot to show the menu: And a lot of options in there to selectively block the effects so you don't miss out on all of the fun :)


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To change your audio devices in KDE/Plasma, I used the "Phonon Audio and Video" application to change the device priorities. I setup the priorities in Audio Playback, then "Apply(ed) Device List to .." everything else.


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Try to run the command plasmashell and see if that works. If only Plasma crashed, try plasma5-desktop --replace. This will kill all remaining instances of Plasma and start a new one.


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This happened to me a while back. It would get to the login screen, and I could type in a username/password, but at some point it would go blank, and restart X. It eventually went away when I upgraded to a different video driver, and inspite looking for it, I couldn't find anyone else talking about the same symptoms. I suggest you try a few things, ...


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Following @elder-geek's suggestion, I noticed that my connection didn't have the password saved. (Connection editor -> Edit Connection 'X' -> Wireless Security). If you put the password in this tab and hit OK, it should save it.


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After a lot of digging, it turns out that the NVIDIA driver was to blame for everything. The default NVIDIA proprietary driver that ships with Kubuntu 15.10 has a lot of bugs, especially with newer cards such as GTX 960M. The solution is to add this repo: http://www.binarytides.com/install-nvidia-drivers-ubuntu-14-04/. After installing the latest version ...


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I (partially) solved this, so I wanted to post how in case anyone with similar problems finds this. summary - I commented out the line After=network-online.target in /lib/systemd/system/rc-local.service.d/debian.conf. Note that this may break rc.local scripts which depend on network. Here's how I found it. First, I read some resources here ...


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I'm having the same error. Attempting to install kde-config-telepathy-accounts just gives another error message Update: sudo apt-get autoremove -f kde-telepathy* fixed the problem by forcibly removing the offending packages and giving me control of apt again.


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After killing all nautilus proccesses, the problem is fixed for me: $ killall nautilus It is not a great soution either but it is easier than reboot :)


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If you want Unity 7: sudo apt-get install ubuntu-desktop If you want Unity 8: sudo apt-get install unity8-desktop-session-mir



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