I tried installing proprietary fglrx drivers by following instructions from https://help.ubuntu.com/community/BinaryDriverHowto/AMD However the installation failed with the error 'amdconfig: No supported adapters detected'.

Now laptop boots to a purple screen followed by the black screen. I had made a backup of the xorg.conf file but replacing it does not solve the problem.

I am lost. Please help me get the login screen back.

UPDATE

As suggested I tried adding nomodeset after "quiet splash" in the Grub-menu. However the system still boots to a black screen. Here are the current grub settings:

GRUB_DEFAULT=0

GRUB_HIDDEN_TIMEOUT=0

GRUB_HIDDEN_TIMEOUT_QUIET=TRUE

GRUB_TIMEOUT=10

GRUB_DISTRIBUTOR='lsb_release -i -s 2> /dev/null || echo Debian'

GRUB_CMDLINE_LINUX_DEFAULT="radeon.modeset=0 vesafb.nonsense=1 quiet splash nomodeset"

GRUB_CMDLINE_LINUX=""

Kindly suggest what else can be done to rectify the problem.

  • A typical solution I've seen for these kinds of problems is to add nomodeset to the end of GRUB_LINUX_CMDLINE_DEFAULT in /etc/default/grub and then run sudo update-grub. However, some people have noted that this decreases graphics performance (low resolution, less sharp image). – hal7df Jul 15 '14 at 4:03

I think that you have to edit grub. For that, ESC at the beginning of the boot. After: e (to edit). At the end of the line which start by "Linux...", add nomodeset after "quiet splash". Then F10. Normally, you be be able to boot. If you want to keep nomodeset for the next boot, you need is to "add nomodeset to the end of GRUB_LINUX_CMDLINE_DEFAULT in /etc/default/grub and then run sudo update-grub", as hal7df explained to you.

But maybe the best idea is to desinstall fglrx. I have also a AMD HD8670M in hybrid video card, on Ubuntu 14.04, without fglrx. I do not think that AMD HD8670M is used, because lspci -nn | grep VGA gives me 00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)

But my computer works well. I change the brightness, which I could not do before with others Ubuntu versions; suspend an resume. The only problem is that the fan sometime is noisier than on Windows 8.1

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