thanks Aleks
aptitude why bind9 tells me
$ aptitude why bind9
i grub-common Suggests desktop-base (>= 4.0.6)
p desktop-base Suggests gnome | kde-standard | xfce4 | wmaker
p gnome Recommends brasero
p brasero Suggests libdvdcss2
p libdvd-pkg Provides libdvdcss2
p libdvd-pkg Depends wget | devscripts
p devscripts Suggests reprotest
p reprotest Suggests qemu-system
p qemu-system Depends qemu-system-arm
p qemu-system-arm Suggests samba
p samba Suggests bind9 (>= 1:9.5.1)
which is not helpfull so far for me
any way i stoped and disabled bind9 (will see) and dnsmasq is now running well
thanks again !