As said in <a href="https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/516412/comments/129">comment 129</a> of bug #516412, since today, pressing enter in GDM restarts it instead of freezing.
As said in <a href="https:/ /bugs.launchpad .net/ubuntu/ +source/ plymouth/ +bug/516412/ comments/ 129">comment 129</a> of bug #516412, since today, pressing enter in GDM restarts it instead of freezing.