I wish to suggest a deeper Look on pcdm, since LightDM needs gobject, which cant be a really perfect solution for us and sddm seems to be not the favorite of the whole community. PCDM is, like the name suggest this, developed from PC-BSD and written with qt libraries: http://wiki.pcbsd.org/index.php/PCDM

Shalok Shalom wrote:[…] and sddm seems to be not the favorite of the whole community.

Could you cite any sources? I didn't see anything else like this yet.

Shalok Shalom wrote:[…] PCDM is, like the name suggest this, developed from PC-BSD and written with qt libraries: http://wiki.pcbsd.org/index.php/PCDM

• PCDM is still on Qt4, while SDDM had Qt5 support for quite some time
• PCDM has a focus on PC-BSD, therefore unlikely to have native systemd user-session support in the future which will definitely be "a thing" to manage graphical sessions on Linux in the near future.
• PCDM is developed in a SVN repository, which creates a really high entry barrier for contributions from the outside in the age of git/PRs/RRs
• PCDM uses Qt Stylesheets for theming, while sddm uses QML which makes it far easier to theme + adapt to different form factors/displays
• SDDM is about to get native Wayland support while this still seems to be a bit further away for PCDM
• SDDM is actively developed while PCDM's development seems to have stalled quite a bit lately (last commit from 2013-04-16 18:26:57)

>since LightDM needs gobject, which cant be a really perfect solution for us


That really isn't a problem. So much of KDE stuff relies on stuff which uses gobject.
LightDM has Qt bindings, I wrote them

Anyway, we'll probably be encouraging SDDM. We have a Plasma based theme for it.

No. Better port KDM to 5-th platform. It was working more then ten years, and it was allways strong and flexible. No one DM comepairs to KDM. Especially on multiseat stations. I use it even on computers without KDE.

KDM's a lost cause with 5, they deleted the source from their git so there is no chance of it continuing. It'll be either SDDM or LightDM as the successor, as GDM doesn't play nicely with 5.