As first step, I tried building 4.3.0-rc1 kernel and boot Nemomobile (with Easy Boot) on it - but a few second into the boot, N9 just turns off (the same thing happened with 3.14.0). I didin't expect much (working USB, maybe) but this is still disappointing.

I used old "mer" defconfig for N9 updated with make olddefconfig. A few manual tweaks/bits were required as described here: http://elinux.org/N900#DT_Kernel_Compilation, and compilation was done using sb2.

I'm unsure what can be used to debug this kind of behaviour apart from using working serial console.

Has anybody else tried building/booting it?