Confirmed; 'debian/patches/53_XScreenSaver.ad.in.patch' needs to be updated to set the new login command as just 'gdmflexiserver' instead of 'gdmflexiserver -l -a -c FLEXI_XSERVER'.
Confirmed; 'debian/ patches/ 53_XScreenSaver .ad.in. patch' needs to be updated to set the new login command as just 'gdmflexiserver' instead of 'gdmflexiserver -l -a -c FLEXI_XSERVER'.