sddm login with HideUsers in sddm.conf

demm yes you were right, if I use an other sddm theme than breeze I can't access to the user login zone ! thanks for your help.

No, that is a bug in the other themes, so you have the same issue with the Midna theme? That will need fixing then.

demm yes same behaviour with midna sddm theme.

Can you please also test with the default sddm theme, Maui? Just leave the theme empty in the conf file, it will always fall back to that default.

demm same bug with default theme, unable to get access to login if HideUsers is set.

Then it needs to be reported upstream for the default theme:
https://github.com/sddm/sddm/issues

demm ok I will do that this evening.

Thanks to the sddm team :-)

Not solved at all, they just closed it without addressing the fact that the default theme shipped in SDDM fails.

demm proposed workaround : "use a sddm theme which is doing the required job and good bye"