Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Problem: Updated on 30/07/2012 (no idea what was updated, noticed a lot of updates to Qt), restarted, and was greeted with a broken, painful looking desktop.

Tried $ unity --reset

But system complained - "Window Manager warning: Failed to load theme "Ambiance": Failed to find a valid file for theme Ambiance

enter image description here

share|improve this question
up vote 0 down vote accepted

I was able to fix this problem by reinstalling Ambiance with the following command, and restarting the computer.

sudo apt-get install light-themes

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.