AnsweredAssumed Answered

i.MX6 long boot time from SD card w/o LAN

Question asked by Uwe Beyer on Nov 21, 2012
Latest reply on Nov 22, 2012 by Uwe Beyer

Hi,

 

I've got a brand new MCIMX6Q-SDB board and downloaded the LTIB source package "i.MX 6Quad and i.MX 6Dual Linux GA BSP 3.0.35 Source Code Files". It compiles nicely and i can run my device either via LAN (tftp/nfs) or from SDCard.

 

When I boot purely from SD Card and remove the LAN cable it takes long minute when the ethernet driver is loaded and the system tries to do a DHCP request before this finally timeouts and the boot process completes. (Actually the whole process is even tried twice.) Here the output I see on the serial console additional comments about the waiting times.

 

....

eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=1:01, irq=-1)

--- 120 seconds waiting

Sending DHCP requests ...... timed out!

--- 80 seconds waiting while the dots indicate that it does several retries

IP-Config: Reopening network devices...

eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=1:01, irq=-1)

--- 120 seconds waiting

Sending DHCP requests ...... timed out!

IP-Config: Auto-configuration of network failed.

--- 80 seconds waiting while the dots indicate that it does several retries

...

 

When I plugin the LAN cable it is able to get network access immediately, do the DHCP request and runs through all this without delay.

Since our system will normally not have a LAN connection it is an important issue to avoid this >5 minutes waiting time during system boot.


I worked before with an IMX53 and could see that there was a small delay too but it was just a few seconds and also the repetition was not done.


I tried to find some configuration settings in LTIB but could not see anything obvious. This whole task seems to be done before the init process starts and the inittab/rcS scripts are executed. So how can I configure it?


Any help would be appreciated.

Cheers,

Uwe


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