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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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Today I (apparently) experienced the same problem using a system administrator UID. I tried logging in with a non-admin UID on the console. Success. I remotely logged in with the admin UID and this was my session: Last login: Fri Jul 3 16:55:22 2015 /usr/bin/xauth: /home/kingb/.Xauthority not writable, changes will be ignored kingb@North40:~$ ls -l ...


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You can try this: sudo nano /etc/default/grub Then Add the options acpi=off apm=off to GRUB_CMDLINE_LINUX_DEFAULT Then run: sudo update-grub Then reboot your computer.


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I found this solution: First: sudo apt-get remove gnome-screensaver Then: sudo killall gnome-screensaver Suspend, resume and you will be direct on the Unity's password promt. Note: in my case, after this "solution", I experienced another issue with my second monitor, but I was able to resolve it soon.


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Are you sure this is not because of inactivity. What I would try to do would be to install the powertop package in software-center or by sudo apt-get install powertop then run sudo powertop and for all usb devices in tunables set it so it says bad while this may use a tiny bit more power it will stop the power managment from switching off usb devices. This ...


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I have encountered this problem in both 12.04 and 14.04 following an update. Further updates appeared to fix the problem. I recommend you run update a few times. In the meantime I discovered a stop-gap measure which appears to work. When this happens, select "log in as other user" (select other user) and then log in as the same user. Your desktop ...


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Problem with window manager At your login screen, next to the user, there might be a ubuntu sign. When you click on there, there might be different window managers to choose from (ubuntu default/gnome/kde/...) If not... try to get to the a terminal: Ctrl+Alt+T (after you logged in on your desktop) Crtl+Alt+F1 (to login to tty console) (to go back to GUI ...


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You could try just reading the crash logs. That's what causes that pop up. Run sudo rm /var/crash/* in a terminal. That should fix the problem after a reboot.


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I had the same problem when i was using the Ubuntu based operating system, Zorin OS and I didn't find a solution except booting into Gnome Recovery mode which Ubuntu doesn't have. I thought the problem was a bug to do with Zorin OS, so I ended up uninstalling Zorin and installing Ubuntu because I thought it would be more stable (and it is). So the only ...


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I experienced the same problem and the cause in my case was that I tried to add something to the /etc/environment file and whatever I added seemed to not want me to log in after I restarted. Solution: When at the login screen press ALT-->F2, login with admin username and password and edit the /etc/environment file and remove what changes you made to it. ...


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Obviously you're entering a wrong password. Try resetting the password as directed here or Google for similar procedures.


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The easiest way is just to mute sound in the greeting. Just click volume and click "mute". This will mute sound only in the greeter.


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The simplest way to modify LDM settings? Try LightDM GTK+ Greeter Settings GUI... It should be capable of what you want to do. LightDM GTK+ Greeter Settings is a small GUI written in Python which lets you modify various LightDM GTK+ Greeter settings, such as the theme, font, background, window position and more, settings which otherwise can only be set by ...


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I think your system were shut-down while system update in process. so I suggest you to login in terminal by using Ctrl+Alt+F2, login to you shell and execute following command: sudo dpkg --configure -a it will repair your packages and get your system back.



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