No more ethernet with linux... Android connection is fine?!?!

[MarkHaysHarris777]

Hi,

Pine64 with 2G memory and the wifi/bluetooth pcb on, DC-in through the euler-bus.

Recently I was only using android 5.1.1 for its stable wifi connection and decided to try again the linux images for the added apps... Surprisingly ethernet is not working anymore on the linux images I tested: Longsleep's old xenial-pine64-bspkernel-20160507-1, newest xenial-pine64-bspkernel-20160716-1, xubuntu-xenial-mate-20160528-longsleep-pine64-8GB, Armbian_5.20_Pine64_Ubuntu_xenial_3.10.102...
For some reason linux builds do not recognize/work with the ethernet connection anymore...

Regarding Longsleep's console-only images, I have to wait few minutes for the login thing to appear. For the 'desktop' images, I login then it says that I'm not connected... It happens even if the cable is connected directly to the main router (no switch). I'm 200% sure that it was working before, I installed Mate from Longsleep's console image...

What is going on?!?!

I suspect that you have your pine board plugged into a gigabit switch|router ?

... some of the pine boards ( if you have not heard yet ) do not work ( GbE ) when plugged into a gigabit router|modem|switch.  There are two work-arounds which will allow the pine board to work at 100 /Full with no problem:

1) modify the cable (my choice) and cut|remove the blue and brown pairs leaving only the green and orange pairs ( wires  1, 2, 3, &6 ).

2) use the ethtoo command to force 100mb/s:

      sudo ethtool  -s eth0 autoneg off speed 100 duplex full

Option (1) above works because the negotiation for 1000 /Full requires all 8 wires... without them only 100mb/s is possible.

Option (2) above works because the negotiation can be forced with software to set 100 /Full.

There is also a third option:

3) place a 10/100 switch between the pine board and the router|modem.