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My computer boots to a black screen, what options do I have to fix it?

Hey guys, I was using my Ubuntu 12.04 and today I had a problem:

I was running virtual box, photoshop and doing some updates, when ubuntu "explorer" went missing. The top and bottom bars disappeared too.

The only thing that remained was the "explorer" window, I couldn't press ALT+TAB to change programs, seemed like the "explorer" was frozen.

I tryied rebooting the system manually, but when I turned it on again, after the classic purple screen with the dots, the screen went back, neither my keyboard nor my mouse work.

Already tryed ubuntu 12 LiveCD, boot-repair and recommended repais, but the problem persists.

So, anyone can give me a hint of what happened or how can I fix this problem?

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marked as duplicate by Jorge Castro, Tom Brossman, Eliah Kagan, John S Gruber, maythux Oct 5 '12 at 7:40

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Pode ser que falhou alguma coisa no update, tenta entrar no Recovery Mode.

Se não funcionar, tenta apertar F8 antes depois do grub iniciar, vai aparecer uma tela de comandos, tenta os comandos mais comuns:

  • sudo apt-get update
  • sudo apt-get upgrade

Para tentar reinstalar a parte gráfica:

  • sudo apt-get install gnome-panel

ou se você usar o unity:

  • sudo apt-get install ubuntu-desktop
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