Comment 2 for bug 883439

The error message in the logs is:

Setting up plymouth-theme-ubuntu-text (0.8.2-2ubuntu28) ...update-alternatives: error: readlink(/etc/alternatives/text.plymouth) failed: Invalid argument
dpkg: error processing plymouth-theme-ubuntu-text (--configure):
 subprocess installed post-installation script returned error exit status 2

 This is not a bug in the Ubuntu plymouth package. It is likely a bug in the Ubuntu Satanic Edition that you installed from, which is not an official flavor of Ubuntu. You probably need to remove whatever is currently at /etc/alternatives/text.plymouth and run dpkg --configure -a.