Fault in Unity prevents proper GUI start. Lightdm and Compiz work.

[Konstantin Gizdov]

All graphics elements that depend on Unity do not work. However I am able to login through lightdm and compiz loads, so I can have some GUI. (I will update with pictures, once I figure out how to access my system properly)

I have gone thoroughly over the updates that led to this issue and have narrowed the culprit.

What I did was to go to /var/log/apt/history.log and manually follow the trail of packages (including drivers) to isolate the issue. It turns out since the last update of unity and systemd (+related) packages, unity does not work with Nvidia's drivers any more. (I will update with the history.log as soon as I can find a way to upload without unity).

However, compiz and lightdm work flawlessly at the moment and if I revert updates (for unity and accompanying) way back, unity loads as well.

Further updates will follow below.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.2+14.04.20140714-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Fri Sep 19 15:47:30 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-04-18 (153 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Stephen M. Webb (bregma)]

Which supported nVidia driver package do you have installed?

[Konstantin Gizdov (kgizdov-deactivatedaccount)]

Here are some accompanying files: bugs.tar includes history.log and three screenshots to illustrate the issue.

I am using nvidia-graphics-drivers-331 as my driver, because nouveau driver does not work correctly with my card.