I wonder if it's possible to change the appearance of the unlock screen as I'm not a big fan of this default greyish dialog box:
(Image reference: http://www.tuxgarage.com/2012/04/ubuntu-12-04-precise-pangolin-review.html)
I have literally no experience with applying any themes in Ubuntu and whenever I've tried to change a specific part of the interface I think I changed pretty much anything but the part I'd like to change.
Therefore I'm also not sure if it's possible to just change this dialog box or if I've to apply a broader theme. Some explanation about the general structure would be very much appreciated.
Also some tips where to find fitting themes and how to apply them would come very handy – or just some links for tutorials explaining this task as I struggle to dig the net for some informational resource 🙂
Best Answer
There's currently no way to configure the appearance of the lock screen.
However, there is work in progress to improve the appearance of the lock screen by replacing it with the same software that powers the login screen.
Completion of that work is contingent upon development for the next version of Unity and the Mir project, which is planned to drastically revamp the underlying systems behind the login screen, graphical login sessions, user switching, and the lock screen.
A preliminary version of the next version of Unity with an improved lock screen is scheduled to be available for use by developers next month, and the finished product with Mir is planned to be included in Ubuntu 14.04.