From "AllStarLink Wiki"
If you have upgraded your kernel when doing a system update with
apt-get update apt-get upgrade
you may need to recompile DHADI. Login as root and
cd /usr/src ls -l # see the dahdi dir similar to dahdi-linux-complete-2.10.2+2.10.2 # cd into that directory cd dahdi-linux-complete-2.10.2+2.10.2 make # if no errors make install