software-properties-gtk succeeds, even nvidia driver isn't installed proper

[Karl Krach]

This bug depends on #574397

On a brand new ubunto 12.10 installation, when switching to nvidia driver it looks like as it succeeded. But after reboot, the desktop doesn't fill the screen. It turned out, that the nvidia driver is installed - but not the kernel module - see attached log.

Please make the driver-switching fail, when such problems appear. (Better of couse, that such problem woun't appear - but that's not in your hand)

Workaround here: install "linux-headers-generic" and "nvidia-current" manually.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: software-properties-gtk 0.92.9
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
Date: Sun Oct 21 14:00:01 2012
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)