LightDM or GDM is just a small detail, but it’s not the only one. It’s the File Manager, the File Previewer (aka Sushi), the Scroll bars.. So even if you install GS in Ubuntu, experience will be much different from the Vanilla Gnome. Anyway..
This isn’t in any case a complete review, many things are missing and many things aren’t ready yet. For example Pin Unlocking is missing (or I have compiled something wrong) and I also couldn’t test notifications under Shield as it keeps crushing :(
GDM Login Screen
Sign in as different user
If we keep an input screen for some time open, GS will revert the screen on the previous step.
Gnome Shell Lock Screen
And this is the new Lock with the Curtain effect and Pin un-locker which is missing.
At the moment I could slide up the “Curtain” only with mouse and not with a shortcut as it is supposed to happen.
And here is where the pin unlocker will be placed.
GDM and Lock while seem similar and share exactly the same design are two different modules. And if you don’t like how they look like, no worries, they are both theme-able! I am saying because this blue-curtain with the huge white time will not please many people I guess :)
Unfortunately for as long as there isn’t such a great Distro (in many ways) as Ubuntu, Gnome will be bind with it. Most people that run Gnome Shell do it through Canonical’s product and while that was working great for many years, it feels now that the relationship/communication Ubuntu-Gnome is broken.
It’s not only about Unity, about the incompatibilities between Compiz/Clutter, about LightDM and GDM or lately about the discussions in Canonical to remove completely Nautilus or the un-maintained systemD. Is more than this..
The bottom line is that we can’t get a Vanilla Gnome experience in Ubuntu, in any case, and no matter who’s the fault, isn’t look good for any side.