now that a fork of SDDM is being made, I just wish report some feedback on multi seat on sddm.

sddm does not work with multi-seat (here i mean for example 2xgpu+mouse+keyboard, running simultaneous separate sessions).

when X11, it has somewhat worked on sddm, breaking in some versions, but in latest version working, however, it is currently not possible to launch two wayland sessions using sddm, atleast not while sddm itself runs in X11 mode. The issue that happens is that the new (for example) plasma wayland session tries to launch, but does noget get access to the DRI device, for some reason X doesnt release it. This only happens on seat0, seat1 is able to login to a wayland session. - most probably because seat0 is bound to a vt.

I was unable to make wayland mode work in sddm, so I have not tested that. As a workaround, I have switched to greetd, which needed a tiny patch to work(it hardcoded XDG_SEAT=seat0). But with that, i have 2x greetd running with sway + qtgreet as greeters, each fully capable of launching plasma wayland sessions.

My rationale for this "bug report" is to give feedback so that hopefully this scenario can be working in plasma login manager