I think the default login screen uses the US keyboard layout only, so there would be no way to type '€'. This design presumably is to allow for the case that multiple users of the same PC might want different languages. So before you know which user it is, you need to assume the lowest common denominator (US keyboard).
The fix up to and including Gnome 3.24 is to configure your machine to always use your preferred language/layout system-wide: Settings > Language Support > Apply System-Wide However... the design has completely changed as of 3 days ago and I no longer know how to fix it in gnome-control-center 3.25 ... https://launchpad.net/ubuntu/+source/gnome-control-center/1:3.25.92.1-0ubuntu1 ** Also affects: gnome-control-center (Ubuntu) Importance: Undecided Status: New ** Tags added: gnome-17.10 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1716159 Title: gdm greeter does not allow euro character (€) when typing password Status in gdm3 package in Ubuntu: New Status in gnome-control-center package in Ubuntu: New Bug description: In latest Artful (2017-09-08 daily), gdm does not allow to enter the euro character (€) when typing the password (be it with the real keyboard or with the visual on screen keyboard). Steps to reproduce: 1. on the gdm login screen, try to type € in the password field 2. the input is ignored (not big dot is added) 3. if your password contains a € symbol (which is allowed, incliding during installation with ubiquity), you cannot login anymore... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1716159/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

