I believe it's an issue in upstream; I did spend a little time trying to investigate/recompile/figure out which set of changes removed/broke this functionality, but ran out of time.
At present to make multi-seat work I have to manually install and pin the old version of Xephyr.
It's a shame as multi-seat works incredibly well (once set up.)
Absolutely.
I believe it's an issue in upstream; I did spend a little time trying to investigate/ recompile/ figure out which set of changes removed/broke this functionality, but ran out of time.
At present to make multi-seat work I have to manually install and pin the old version of Xephyr.
It's a shame as multi-seat works incredibly well (once set up.)