That looks like video corruption, and it is possible that gnome-classic has some of the animations disabled compared to gnome-shell, but I can't think of any other difference.
.xsession-errors is obsolete, logs will by default be in ~/.cache/upstart/gnome-session-GNOME.log under upstart boot or `journalctl -b /usr/bin/gnome-session` under systemd init. But either way it seems likely that is a bug in Nouveau, so those logs might not be too useful either. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1412602 Title: No live DE in Vivid using nouveau w/GeForce 7025/nForce 630a To manage notifications about this bug go to: https://bugs.launchpad.net/nouveau/+bug/1412602/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp