Ubuntu – Mouse pointer invisible after reinstalling Unity on top of Gnome in Ubuntu 13.10

I have experienced this bug as well. The only way I have been able to fix this is by deleting my ~/.config folder. A better option is to simply move your .config folder into another folder

mv -f ~/.config ~/.backupconfig

in case you are unfamiliar with terminal commands:

'mv' is the move command and '-f' forces the move

This will return Unity to normal and allow you to use it again, though you will have to set up your Launcher panel again. I have yet to find a way to use both together, unfortunately, because I really like Lubuntu and Unity. I hope problems will be resolved when LXQt is finished and Unity migrates to Qt. I think the problems arise mainly from openbox, and some sort of conflicting config there.

You have 2 options: either remove gnome compleately or reinstall it's missing parts.

For removing gnome you will need to know what's left of it on your system (usually apt-get autoremove will take care of that).

Reinstalling gnome only requires that you apt-get install gnome3. This will reinstall everything needed to get gnome working again.

Note: gnome3 is a meta-package, this is so to make installation of gnome easier. This sadly also means that if you remove parts of it it will think that you want to remove all of gnome, so by using gnome you either have a ton of stuff that you'll never use or you don't use gnome at all. Sadly there's no middle path. (Actually there is, but it's major pain.)