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If you have docky installed this fixed the problem for both of my machines. Ubuntu 15.04 Unity + Docky, Cairo-Dock, or Plank (DOCKY) cd ~/.config/autostart nano docky.desktop add X-GNOME-Autostart-Delay=20 (IF YOU USE CAIRODOCK) cd ~/.config/autostart nano cairo-dock.desktop add X-GNOME-Autostart-Delay=20 Or you can remove either one from autostart. ...


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A much better way to install 352 driver is running in terminal sudo add-apt-repository ppa:xorg-edgers/ppa sudo apt-get update sudo apt-get install nvidia-352 nvidia-prime sudo add-apt-repository -r ppa:xorg-edgers/ppa and reboot.


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I am using a windows xdmcp client (MobaXterm), however, its pretty straightforward with the following provisos 1 - use lightdm as the window manager on ubuntu server 2 - I could not get unify desktop to work, use metacity 3 - that thread worked for me, as long as you do 1 and 2 above


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Try restarting if this doesn't help try updating your computer or try sudo apt-get update this should update the repository that it is feeding from.


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For each xserver you can only run one display manager at a time. When installing a new display manager on the command line you usually get a dialog asking which one you want by defualt. To run this again you can try running sudo dpkg-reconfigure lxdm and should get a dialog and select lxdm instead of lightdm as the display manager. Although unity is a ...


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you have to tell your terminal that you want xterm to start on the display you are currently sitting in front of. You can do so by typing export DISPLAY=:0.0 before you execute xterm


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I just had this problem ten minutes ago and after looking to /var/log/Xorg.0.log I found out that it's a Nvidia problem (there was a line saying Xlib: extension "GLX" missing on display ":0). I realized I have Nvidia drivers from official website which are nor really stable and tested (so I've read and also experienced before). The solution here was to ...


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Run sudo apt-get install gir1.2-appindicator3-0.1


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I got the login loop in connection with an update from Ubuntu 12.04 to 14.04. With gdm I had error messages in ~/.cache/gdm/session.log with entries such as /etc/gdm/Xsession: line 33: mktemp: command not found and after sudo aptitude purge gdm with lightdm I got several similar error messages in ~/.xsession-errors, e.g., usr/sbin/lightdm-session: line 24: ...


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To switch between display managers in Ubuntu you can use the command dpkg-reconfigure, for example to switch to kdm: sudo dpkg-reconfigure kdm You'll get a screen that look like this: choose the one you want(kdm) and hit enter, then probably you need to make a reboot. All rights go to owner


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I've got the same problem with Nvidia drivers and the solution was to have Launcher placement enabled on both monitors, else the situation was as your described. I guess it's bug of proprietary Nvidia drivers, because they don't see 2 monitors but one with resolution of both combined.


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Create new user from TTY and reboot your system, then login from new user, I had the same problem and I solve this on that way. If you are new and don't know what is TTY and how to recreate an user only comment and I'll answer your questions.


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I assume that you're using LightDM as "login manager"? You can edit the file /etc/lightdm/lightdm.conf to contain: [SeatDefaults] user-session=icewm-session or [SeatDefaults] user-session=IceWM An explanation of the differences between icewm-session and IceWM can be found in the IceWM FAQ: "Beginning with IceWM 1.2.13 there is a binary icewm-session. ...


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1.just double check that IOMMU is not enabled! 2.if you use (u)efi boot and signed kernel mobo and gpu/s both must have (u)efi bios..if gpu not have that kind of bios, a)update bios of gpu with factory uefi gpu bios,or with non factory modified older non (u)efi gpu bios(updating bios is always risk!) b)simply dont boot Ubuntu (u)efi way,change boot device ...


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It looks like a bug and affects me too. Switching to SDDM works for me. Switching from lightdm to SDDM is as follows: Run the following and select sddm, and then do a restart: sudo dpkg-reconfigure lightdm Then select sddm.


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For me this problem occurred after upgrading from "Ubuntu 12.04 LTS" plus TDE to "Ubuntu 14.04 LTS" plus TDE. TDE is the trinity desktop environment (trinitydesktop.org). The cause of the error was that /etc/X11/default-display-manager pointed to lightdm although during the upgrade I told it to use tdm-trinity as default. lightdm was broken (and I don't ...


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Try to start the full login daemon if neccessary via sudo service lightdm start


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Running a sudo apt-get upgrade fixed my problem



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