Hello Igor,   I am using vanilla 4.4 for labomo-r1   it seems zram module is missing. Do you intend to compile the kernel with this option, please? gr@bpi:~$ sudo modprobe -Rf zram modprobe: FATAL: Module zram not found. On raspbian, kernel 3.18.x-4.1.x, there is a kernel module "zram" useful for embedded systems... working fine (also using on my x86 laptop)   https://wiki.gentoo.org/wiki/Zram   Nice week-end,   Regards,   Guillaume