Re: SYSFS "errors"

From: Alexander Stein
Date: Tue Feb 19 2013 - 02:41:54 EST

On Monday 18 February 2013 09:49:16, Greg KH wrote:
> > Invalid argument - /sys/devices/virtual/net/lo/speed
> > Invalid argument - /sys/devices/virtual/net/lo/duplex

This is even true for ethernet devices which do not have a link currently or non-ethernet devices (e.g. CAN).
> LANG=C cat /sys/class/net/enp1s8/speed
> cat: /sys/class/net/enp1s8/speed: Invalid argument
> ethtool enp1s8 | grep -A1 Speed
> Speed: Unknown!
> Duplex: Unknown! (255)
> LANG=C cat /sys/class/net/can0/speed
> cat: /sys/class/net/can0/speed: Invalid argument


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