FTR, those segfaults: 1-occur using either TDM or XDM as greeter 2-happen on exit of IceWM session as well as TDE session 3-happen when DE session exits, so are found only in Xorg.0.log.old if Xorg is running 4-The backtraces also show up in tdm.log 5-only cause TW to need systemctl restart xdm, not 15.4, and not if using XDM as greeter instead of TDM So it seems at least 2 new issues need their own reports, at least one of which on TDE's bug tracker.