Any questions or suggestions are always welcomed.4. I hope these quick tips help you to recover your Ubuntu 14.04 from a frozen Unity to a working Unity. Once you have Unity back to normal at next reboot, just reinstall the Nvidia drivers (you had just removed them). And after entering username and password, use the following commands one by one: sudo apt-get update People with Nvidia graphics, please confirm that the steps below work for your system:
While the above trick worked for my system, I cannot verify the one below. I don’t have experience with Nvidia graphics but I found some people mentioning additional steps for system with Nvidia graphics card. Fixing Unity freeze issue with Nvidia graphics: After the reboot, you should have Unity working as normal. The last command will reboot your system. Sudo apt-get install -reinstall ubuntu-desktop After you enter your username and password, use the following commands one by one to reinstall Unity desktop. You will be asked to enter your credentials. This will take you to command line interface (instead of the default graphical user interface). Well, since you are stuck with a frozen system, use Ctrl+Alt+F2 key. Let’s see how to do that: Reinstall Unity in Ubuntu 14.04 to fix system freeze issue This problem of missing Unity launcher, panel and system freeze can be solved by re-installing Unity. Basically you will have Ubuntu in an unusable state.
You boot in to Ubuntu 14.04, enter your credential and the system just hangs up, freezes. If you are lucky, you might see mouse cursor, background wallpaper but nothing else.
If you upgraded Ubuntu 13.10 to Ubuntu 14.04, you might end up with Unity freezing at login time.
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