How do I get appearances back to the normal after installing Gnome?

Question

I installed Gnome as an alternative desktop environment on 14.04. However, since rebooting:

• the loader graphic when starting and shutting down my machien shows the Gnome foot rather than the Ubuntu logo
• my login screen looks slightly different
• when I log into my Ubuntu (Unity) desktop environment, the window decorations are distinctly different.

How do I restore the appearance of my Ubuntu (Unity) loader, login screen and desktop to the default settings?

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While it was installing an dialog came up asking me which window manager should be my default. I thought the answer was "lightdm" so I picked that. I have since found out that is probably not the cause.

Based on the answer to How to set a default window manager? I tried looking at /usr/share/gnome-session/sessions/ubuntu.session but it doesn't contain a DefaultProvider-windowmanager property.

If I run sudo update-alternatives --config x-window-manager I get:

There is only one alternative in link group x-window-manager (providing /usr/bin/x-window-manager): /usr/bin/mutter
Nothing to configure.

Answer 1

For the loader graphic: type

sudo update-alternatives --config default.plymouth

in Terminal window. Choose ubuntu-logo.plymouth. For the login screen - try

sudo apt-get install --reinstall lightdm ubuntu-desktop

For Unity - open open Appereance and change theme.