I have been tinkering around because I find that Ubuntu 13.10 (which I have as dual boot on my Asus laptop) get my computer a little hot and I get some crashing issues sometimes when watching videos, and more crashes when using slimboat.
Reading around a bit, I (wisely or otherwise) installed fglrx, and then I went into System Settings > Software Updates and in one of the tabs there selected "proprietary driver fglrx update". On rebooting my laptop into Ubuntu, I hear the login sound, but get a black screen.
Since I cannot get into System Settings now to change the graphics card driver back, what can I do?
My graphics card is an ATI Mobility Radeon HD 5470 1 GB. My laptop is 86_64 bit.
EDIT: I looked at the page that gives advice about how to fix the problem of booting to a black screen. I installed Ubuntu a few weeks ago successfully, and have been using it just fine with the exception of some crashing with video files and browsers, as explained above. So the advice for a new install doesn't apply, and grub is working just fine so the dual boot advise doesn't apply either.
I did follow the advise about ATI Radeon drivers:
If your graphics card is ATI, follow these steps: In the GRUB menu at startup, press "e"; then Use the arrow keys to replace quiet splash with radeon.modeset=0. Then press the Ctrl+x key combination to boot.
This did not work either (and I also tried "nomodeset"). Although I did get the purple screen straight out of grub (which I wasn't getting), only to go black before the login screen and the login sound.
The issue here is that I messed around with the graphics driver, and would like to be able to get in long enough to change my settings as explained in my opening 3 paragraphs.