[Galaxy S III I9305 (4G LTE + 2GB RAM) Android Deve] p.a.n:
I enabled nonsecure adb, but couldn`t log in because of missing /system/bin/sh. So I focused on mounting /system. The rest is from dmesg and /proc/last_kmsg. But I am using my own multiboot solution, which made this easier.

The last build is booting :) There is some some problem with vold, which crashes when sdcard is inserted:

12-15 09:16:36.155 8895 8904 V vold : /system/bin/sgdisk
12-15 09:16:36.155 8895 8904 V vold : --android-dump
12-15 09:16:36.155 8895 8904 V vold : /dev/block/vold/disk:179,16
12-15 09:16:36.155 8895 8904 E vold : Failed to setexeccon
12-15 09:16:36.255 2057 2057 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
12-15 09:16:36.255 2057 2057 F DEBUG : Build fingerprint: 'samsung/m3xx/m3:4.1.2/JZO54K/I9305XXBMA6:user/release-keys'
12-15 09:16:36.255 2057 2057 F DEBUG : Revision: '0'
12-15 09:16:36.255 2057 2057 F DEBUG : ABI: 'arm'
12-15 09:16:36.255 2057 2057 F DEBUG : pid: 8895, tid: 8904, name: vold >>> /system/bin/vold <<<
12-15 09:16:36.255 2057 2057 F DEBUG : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
12-15 09:16:36.260 2057 2057 F DEBUG : r0 00000000 r1 000022c8 r2 00000006 r3 407be978
12-15 09:16:36.260 2057 2057 F DEBUG : r4 407be980 r5 407be930 r6 00000016 r7 0000010c
12-15 09:16:36.260 2057 2057 F DEBUG : r8 00000003 r9 407be1c4 sl 00000024 fp 407c31e0
12-15 09:16:36.260 2057 2057 F DEBUG : ip 00000006 sp 407be130 lr 404c8ff9 pc 404cb3f4 cpsr 400f0010
12-15 09:16:36.300 2057 2057 F DEBUG :
12-15 09:16:36.300 2057 2057 F DEBUG : backtrace:
12-15 09:16:36.300 2057 2057 F DEBUG : #00 pc 000423f4 /system/lib/libc.so (tgkill+12)
12-15 09:16:36.300 2057 2057 F DEBUG : #01 pc 0003fff5 /system/lib/libc.so (pthread_kill+32)
12-15 09:16:36.300 2057 2057 F DEBUG : #02 pc 0001c653 /system/lib/libc.so (raise+10)
12-15 09:16:36.300 2057 2057 F DEBUG : #03 pc 000198c1 /system/lib/libc.so (__libc_android_abort+34)
12-15 09:16:36.300 2057 2057 F DEBUG : #04 pc 000174ec /system/lib/libc.so (abort+4)
12-15 09:16:36.300 2057 2057 F DEBUG : #05 pc 00020557 /system/bin/vold
12-15 09:16:36.300 2057 2057 F DEBUG : #06 pc 0001a555 /system/bin/vold
12-15 09:16:36.300 2057 2057 F DEBUG : #07 pc 00019a2f /system/bin/vold
12-15 09:16:36.300 2057 2057 F DEBUG : #08 pc 0000b99b /system/bin/vold
12-15 09:16:36.300 2057 2057 F DEBUG : #09 pc 0000380d /system/lib/libsysutils.so (NetlinkListener::onDataAvailable(SocketClient*)+164)
12-15 09:16:36.300 2057 2057 F DEBUG : #10 pc 00003145 /system/lib/libsysutils.so (SocketListener::runListener()+568)
12-15 09:16:36.300 2057 2057 F DEBUG : #11 pc 0000319b /system/lib/libsysutils.so (SocketListener::threadStart(void*)+2)
12-15 09:16:36.300 2057 2057 F DEBUG : #12 pc 0003f8f7 /system/lib/libc.so (__pthread_start(void*)+30)
12-15 09:16:36.300 2057 2057 F DEBUG : #13 pc 00019f53 /system/lib/libc.so (__start_thread+6)

Init is trying to restart it and mountservice to connect to it, which causes the boot to stuck. But without sdcard it works:) There is a possibility that this may be related to my multiboot, but there ware some problems with sdcard before, waren`t they?

Wifi and bluetooth seem to be working, ril (as expected) not :( I`ll keep testing and debugging, but I don`t have so much time as I`d like to :(

Thanks for your work :)

P.