I have a similar problem with the graphics in particular DRM (direct rendering manager). It hangs all the time generating error messages that accumulate in the LOG file until I run out of disk space in rootfs .
Maybe it is the same problem but to you it is frozen sow hard that not allowed to continue. Did you try to install linux-image-4.4.0-rc6-686-pae ? ; This fixed the problem , at least for me . It was probably 4.3 problem that was already solved in upstream . linux 4.4 its in EXPERIMENTAL... sow Add this line: deb http://ftp.de.debian.org/debian/ experimental main To /etc/apt/sources.list apt-get update apt-get install linux-image-4.4.0-rc6-686-pae After install don't forget remove the line from sources.list! Sory my bad ingles. Hapy new year! Grettings Guillermo Reisch!