Hello,

I would like to detect if network cable is plugged or not to 
Olimex-A20-LIME2 eth0 port. I use standart Linux image. Debian 7 kernel 
3.4.90

"ethtool eth0" command always displays yes for "link detected"  

also

/sys/class/net/eth0/carrier and and operstate values does not change, the 
green led goes off after cable is unplugged.

What may be the reason?

Regards,

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