Hi Ludo, https://github.com/GNOME/gdm/commit/0bb8a777cfc0a3bc53c2c2830dd7e6e2baeeef38#diff-9b802b1ffb5f0ff95bfaa85046d262e7 says:
>custom is a magic name we used to allow for having the user decide their >session by a ~/.xsession file. We no longer support that construct and >haven't for many years. Instead, users who want that functionality can just >add a xsession file to accomplish it. >This commit just removes some left over cruft that never got cleaned up. Another part is still there: if [ "x$command" = "xdefault" ] ; then if [ -x "$HOME/.Xclients" ]; then command="$HOME/.Xclients" elif [ -x /etc/X11/xinit/Xclients ]; then command="/etc/X11/xinit/Xclients" elif [ -x /etc/X11/Xclients ]; then command="/etc/X11/Xclients" else if [ -n "$zenity" ] ; then disptext=`gettextfunc "System has no Xclients file, so starting a failsafe xterm session. Windows will have focus only if the mouse pointer is above them. To get out of this mode type 'exit' in the window."` "$zenity" --info --text "$disptext" else echo "$0: Cannot find Xclients" fi exec xterm -geometry 80x24+0+0 fi fi ... but not sure how to use it.
pgpxwDGpRnqHJ.pgp
Description: OpenPGP digital signature