nvidia-331 driver won't start the display on 14.04

[Hugh Parker]

After I updated to Ubuntu 14.04, my system stopped loading a display. Several reboots made no difference. I tried nvidia-331 and nvidia-304, but the same thing kept happening: I got a message to say that "The system is running in low-graphics mode. Your screen, graphics card, and input device settings could not be detected correctly. You will need to configure these yourself". I'm then given some options:

- If I "run in low-graphics mode, just for one session", I just get the flashing cursor.
- If I click "reconfigure graphics", I get asked whether I want to use my default (generic) configuration or my backed-up configuration, both of which just cause the same dialog box to reappear.

When I look in the logs, it says that the Nvidia kernel module failed to start. At the suggestion of one of the comments on this thread:
http://askubuntu.com/questions/39915...-graphics-mode
...I tried running sudo modprobe nvidia-331, followed by sudo lightdm start. This starts the display in the correct display resolution, but without sound.

After some advice from ubuntuforums, I ended up installing 337.19 from the xorg-edgers PPA, which solved the problem.

The ubuntuforums posts are here: http://ubuntuforums.org/showthread.php?t=2223757

[Hugh Parker (hcp)]

...and launchpad only allows one attachment per message, so here's the kernel log.