Installation of Debian was somewhat more difficult; here the short description what worked for me in the end.
1. I observed that my working installation of Ubuntu used libwacom-bin, which is only in Debian stretch; thus I decided to install stretch (aka testing). Installations of jessie were not supporting the pointer.
2. To install Debian stretch (alpha 5 release) requires the non-free firmware and additionally the driver for the Intel Wireless 7265 rev 61 (aka 7265D), which is iwlwifi--7260-17.ucode (download from a git...), which i put on a second usb stick (on the first i had the inofficial stretch release including the firmware).
3. Install regularly and add the USB stick with the firmware when requested.
4. Restart and produce /etc/apt/sources.list (not automatic in alpha 5)
deb http://ftp.at.debian.org/debian/ stretch main contrib non-free
deb http://security.debian.org/debian stretch/updates main contrib non-free
iface lo inet loopback
iface wlp2s0 inet dhcp
5. restart and login as root; check that network is ok.
Then apt-get update, apt-get upgrade (some problem with iwlwifi?? - it needed a apt-get upgrade -f). install xfce4, xfce4-goodies, xournal (for drawing) startx to test install lightdm
it works, when you restart, the regular xfce login greeter is there!