The system hangs in linux at bootup if the linux ethernet driver is started and no ethernet cable is connected.
Boot from NAND Flash with u-boot environment variable ip=DHCP or ip=192.168.xxx.xxx.
Problem occurs on the freescale eval board (Sabre SD) boards and on our own board.
The cpu seems to go idle mode. We use the standard kernel configuration
CPU: iMX6 Solo, latest BSP 4.1.0
Best regards HR