linux hangs in ethernet driver if no cable is connected

[her]

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

[LeonardoSandova]

where does it hang? if your filesystem is being NFS mounted, then this is the expected behaviour. As Youngcai mentioned, try to avoid the 'ip' parameter of add 'ip=none'

Leo

[AnsonHuang · Accepted solution]

Hi, her

     You should not adding ip=DHCP or ip=192.168.xxx.xxx. in uboot command line if you do NOT have ethernet cable connected.