I tried switching to the proprietary AMD/ATI drivers using the
Software Center > Edit > Software Sources > Additional drivers window in 14.04, which left me with a scary black-as-the-night screen after reboot. I could not even open the text only console.
Using a live cd, I
chroot-ed in and ran
sudo apt-get remove --purge fglrx* and in my nervous haste may have installed
ubuntu-drivers-common (I don't know/remember if it was already installed).
I assume I've reverted back to open source because my display is working again, but I'm not sure…
When I open the
Additional drivers window, all options (
fglrx) are greyed out and can't be selected! And now there is a new option selected, "Continue using a manually installed driver."
When I run
ubuntu-drivers list I get the following output:
So, what's going on? Using
sudo apt-get remove --purge fglrx* says everything is gone.
When I run
ubuntu-devices I get the following output:
model : Radeon HD 6970M vendor : Advanced Micro Devices, Inc. [AMD/ATI] manual_install: True modalias : pci:v00001002d00006720sv0000106Bsd00000B00bc03sc00i00 driver : fglrx - distro non-free driver : xserver-xorg-video-ati - distro free builtin recommended driver : fglrx-updates - distro non-free
I believe the problem is
manual_install is set to True. I don't know if I'm actually using the open source driver, I don't know why the driver options are greyed out, I don't know how to set
manual_install to False.
I don't have any backup
xorg.conf files in
/etc/X11 (although I do have a
xorg.conf.failsafe there – is that a backup?) and the "revert" button is greyed out in the
Additional drivers window.
I just want to go back to the way things were (open source driver selected and automatically updates).
Extra info: The reason I changed drivers was because sometimes after trying to awake Ubuntu from sleeping (especially after long periods asleep)… well, it doesn't. It stays at a black (grey) screen. Searching seems indicate it's a known bug.