Firmware details

WORKSTATION: ubuntu 12.04.5 64bits with arm-linux-gnueabihf-gcc version 4.6
Uboot:
source: 	git://git.isee.biz/pub/scm/u-boot-arm.git
branch:		u-boot-2014.01.y-omap5
compiled as: 	make omap5_igep0050_config CROSS_COMPILE=arm-linux-gnueabihf-
		make CROSS_COMPILE=arm-linux-gnueabihf-
Kernel:
source:		git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git
branch:		master
compiled as:	make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig
		make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage modules dtbs -j 4

Rootfs:		binaries from http://downloads.isee.biz/pub/igepv5_ce/releases/ubuntu-core-12.04.4-isee-20140314-armhf.tar.bz2

Serial Log hangs:
U-Boot SPL 2014.01-0-omap5-g44efc5c (Oct 19 2015 - 09:39:26)
OMAP5432 ES2.0
eeprom not found, using defaults
SATA link 0 timeout.
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: 64bit ncq stag pm led clo only pmp pio slum part ccc apst
scanning bus for devices...
Found 0 device(s).
SPL: Please implement spl_start_uboot() for your board
SPL: Direct Linux boot not active!
reading u-boot.img
reading u-boot.img


U-Boot 2014.01-0-omap5-g44efc5c (Oct 19 2015 - 09:39:26)

CPU  : OMAP5432 ES2.0
Board: IGEPv5
I2C:   ready
DRAM:  1008 MiB
eeprom not found, using defaults
Board Name: IGEPv5 (IGEP0050-FULL-NI-RB0-1GiB) Rev: Engineering Sample - Serial: 0 Manufacturing date: 10:38 10/11/2014
Manufacturer: (c) ISEE (www.isee.biz)
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Card did not respond to voltage select!
MMC init failed
Using default environment

SATA link 0 timeout.
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: 64bit ncq stag pm led clo only pmp pio slum part ccc apst
scanning bus for devices...
Found 0 device(s).
Net:   No ethernet found.
Hit any key to stop autoboot:  0
mmc0 is current device
SD/MMC found on device 0
reading uEnv.txt
** Unable to read file uEnv.txt **
5593392 bytes read in 303 ms (17.6 MiB/s)
52894 bytes read in 25 ms (2 MiB/s)
Booting from mmc0 ...
Kernel image @ 0x80200000 [ 0x000000 - 0x555930 ]
## Flattened Device Tree blob at 80f80000
   Booting using the fdt blob at 0x80f80000
   Using Device Tree in place at 80f80000, end 80f8fe9d

Starting kernel ...