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

Issue:- Black Screen after boot-up

Ubuntu Version:- 12.04, 64 bit

Graphic Drivers Installation method:- Manually purged the old drivers and installed the new drivers provided by amd.

Tried methods:- added nomodeset option to /etc/default/grub and updated the grub using sudo update-grub and restarted the system.

Effects:- Got the "System running into low graphics mode" error with mouse not working.

Workaround:- re-edited the /etc/default/grub file to remove the nomodeset option and updated the grub again.

My graphic card info is as follows:- enter image description here

I want to get rid of the blank screen and i also don't want to loose my graphic card properties.

I just get the black screen and never see the prompt until I press the brightness keys. Sir, the driver that I installed has the following properties:-

*-rwx--x--x 1 root root 106660241 Jul 22 02:11*

I haven't removed the xorg.conf file; here is the screen shot of the file:-

enter image description here

enter image description here

share|improve this question
Is your question the same as this one?… – fossfreedom Aug 5 '12 at 12:23
yes sir, we can say that, but i am not sure about the reason. I have added the screen shot of the brightness values in my original question. – Ankit Aug 5 '12 at 13:08

Your Answer


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

Browse other questions tagged or ask your own question.