Black screen after system boots after package updates 12.04

Asked by Anton Kanishchev on 2013-01-21

Ubuntu 12.04 is installed on the laptop. Has installed fine and has worked for several months. I have just updated the packages and now I get a black screen. The bootloader comes up, I select the kernel I need to boot and it loads. After about 10 seconds (I can see the Ubuntu boot screen all this time). Then the login sound is heard but screen remains black. Pressing buttons doesn't help, nor does pressing the brightness key that was suggested.

However if I enter the shell (ctrl alt f1) I can log in and the monitor works. I am guessing this is a x org problem or something like that since I run the open source radeon drivers and they seem to work. I am sure that I did not change anything else.
12.04 32 bit with latest updates,
Running on laptop
Any help would be much appreciated.

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Ubuntu xorg Edit question
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Solved by:
N1ck 7h0m4d4k15
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What make and model laptop and what video chip do you use?

The make is a Sony vaio nw11st, and the video chip is an amd 4570.

Best N1ck 7h0m4d4k15 (nicktux) said : #3

Try to install (or reinstall) the AMD graphics driver with the commands below.

sudo apt-get install --reinstall linux-headers-$(uname -r)
sudo apt-get install --reinstall fglrx fglrx-amdcccle
sudo amdconfig --initial

Then reboot your system. Execute above commands from the Console Mode (CTRL+ALT+F1).

Thank you.

Thank you NikTh that has partially solved my problem. The system now boots to gui. However I have been using the open source radeon drivers that comes with Ubuntu because I experience less bugs with it. Is there a solution to reinstall the open source driver by any chance? Thanks for your help

I have just installed the fglrx drivers and wanted to go back to the open source drivers. Uninstalling the fglrx and letting Ubuntu find the open source drivers has fixed the problem, thank you very much for your solution Nick Athens

Thanks NikTh, that solved my question.

In future, please give full details like makes and models an d the chips for the system affected. "Running on laptop" isn't too useful, whereas stating the exact laptop snd exact video chip (as your issue is display basd) is incredibly useful and enables helpers to get you to the goal faster :-)