When I try to install 'gnome-shell-extensions' I get this:
That was easily resolved by purging 'gnome-session-fallback'. I got logged into the new classic session, just now poking around.
lance@lance-desktop:~$ sudo apt-get install gnome-shell-extensions
[sudo] password for lance:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
The following NEW packages will be installed:
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 103 kB of archives.
After this operation, 987 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://us.archive.ubuntu.com/ubuntu/ raring/main gir1.2-gtop-2.0 i386 2.28.4-3 [15.8 kB]
Get:2 http://ppa.launchpad.net/gnome3-team/gnome3-staging/ubuntu/ raring/main gnome-shell-extensions all 3.7.3-0ubuntu1 [87.0 kB]
Fetched 103 kB in 6s (15.4 kB/s)
Selecting previously unselected package gir1.2-gtop-2.0.
(Reading database ... 153216 files and directories currently installed.)
Unpacking gir1.2-gtop-2.0 (from .../gir1.2-gtop-2.0_2.28.4-3_i386.deb) ...
Selecting previously unselected package gnome-shell-extensions.
Unpacking gnome-shell-extensions (from .../gnome-shell-extensions_3.7.3-0ubuntu1_all.deb) ...
dpkg: error processing /var/cache/apt/archives/gnome-shell-extensions_3.7.3-0ubuntu1_all.deb (--unpack):
trying to overwrite '/usr/share/gnome-session/sessions/gnome-classic.session', which is also in package gnome-session-fallback 3.7.2-0ubuntu1~raring1
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)
For some reason gdm is eating my lunch, I might try 'lightdm' for a while just as a work-around.