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When I'm working suddenly the mouse doesn't respond and the display turns gray or black. Although I can press any key ( I can't see what I'm doing ) nothing happens at all!!. The only way to recover my PC is to turn it off.

It has happened twice now and I've lost lots of work. This has started right after I upgraded drivers for my video hardware ATI. Any suggestions?

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closed as off-topic by bain, Eric Carvalho, Braiam, guntbert, Warren Hill Jul 18 '14 at 17:01

This question appears to be off-topic. The users who voted to close gave these specific reasons:

  • "This describes a problem that can't be reproduced that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers." – guntbert, Warren Hill
  • "Bug reports and problems specific to development version of Ubuntu should be reported on Launchpad so that developers can see, track and fix these issues." – bain, Eric Carvalho
If this question can be reworded to fit the rules in the help center, please edit the question.

Try to purge the drivers to default state

sudo apt-get remove --purge fglrx fglrx-amdcccle
sudo apt-get remove --purge fglrx-updates fglrx-amdcccle-updates

Then reboot and see if the problem remains. Than you can try reinstall the drivers using terminal

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I'll try! Thx a lot – Lauro123 Sep 19 '12 at 3:50

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