Tuesday, March 31, 2015

How to fix desktop problem on Ubuntu

Many things can go wrong in a graphics stack. If you can't see any graphics or see corrupt graphics the following might help:

  • You can get to a text terminal using alt-ctrl-F1.
  • Check the LightDM logs in /var/log/lightdm.
  • Stop LightDM with sudo stop lightdm.
  • You can try LightDM again with sudo start lightdm.
  • If you have another display manager you want to try (e.g. gdm) start that: sudo start gdm.
  • You can set the default display manager by running sudo dpkg-reconfigure lightdm.
  • Check your system is up to date, especially video drivers.
  • File a bug. If you're not sure where the cause is (lightdm / unity-greeter / unity / X / kernel) file against lightdm and the bug will be triaged and reassigned.

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