Hi Juanito,
i have an legacy bios and i just using the bootpromp after the boot is done, (console), no X-Server started after boot is done,
and this is how i boot:
cat extlinux.conf
DEFAULT xen3
PROMPT 1
TIMEOUT 1
LABEL xen3
MENU LABEL xen3
KERNEL mboot.c32
#APPEND /tce/boot/xen-4.7-unstable.gz --- /tce/boot/vmlinuz64 waitusb=5:root=$BLKID tce=$BLKID nodhcp noutc showapps syslog tz=Europe/Berlin host=xenbox kmap=de --- /tce/boot/corepure64.gz
APPEND /tce/boot/$(basename $BUILDDIR/fs_mount/tce/boot/xen*) --- /tce/boot/$(basename $BUILDDIR/fs_mount/tce/boot/vmlinu*) waitusb=5 root=$BLKID tce=$BLKID nodhcp noutc showapps syslog tz=Europe/Berlin host=xenbox kmap=de pause --- /tce/boot/$(basename $BUILDDIR/fs_mount/tce/boot/corepur*)
EOF
even i can use the comment bootline too, to boot up
Thanks