Hi all, I'm on kernel 4.16.4 and have an issue with eth0, driver is igb. When I remove the ethernet cable, this is always detected:
[ 2.772360] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.4.0-k [ 2.772363] igb: Copyright (c) 2007-2014 Intel Corporation. [ 3.023707] igb 0000:02:00.0: added PHC on eth0 [ 3.023710] igb 0000:02:00.0: Intel(R) Gigabit Ethernet Network Connection [ 3.023713] igb 0000:02:00.0: eth0: (PCIe:2.5Gb/s:Width x1) 00:13:95:1a:54:33 [ 3.023758] igb 0000:02:00.0: eth0: PBA No: 000300-000 [ 3.023762] igb 0000:02:00.0: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s) [ 7.984921] igb 0000:02:00.0 eth0: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX [ 11.184593] igb 0000:02:00.0 eth0: igb: eth0 NIC Link is Down Sometimes, plugging the cable back in is detected ... [ 43.736922] igb 0000:02:00.0 eth0: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX ... but sometimes this is *NOT* detected. I can put the cable in and even after two minutes nothing has been detected. But when I run "rmmod igb" followed by "modpobe igb", the link is detected again: [ 100.528609] igb 0000:02:00.0 eth0: igb: eth0 NIC Link is Down [ 2336.583244] igb 0000:02:00.0: removed PHC on eth0 [ 2339.693521] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.4.0-k [ 2339.693524] igb: Copyright (c) 2007-2014 Intel Corporation. [ 2339.990553] pps pps0: new PPS source ptp0 [ 2339.990561] igb 0000:02:00.0: added PHC on eth0 [ 2339.990565] igb 0000:02:00.0: Intel(R) Gigabit Ethernet Network Connection [ 2339.990569] igb 0000:02:00.0: eth0: (PCIe:2.5Gb/s:Width x1) 00:13:95:1a:54:33 [ 2339.990611] igb 0000:02:00.0: eth0: PBA No: 000300-000 [ 2339.990615] igb 0000:02:00.0: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s) [ 2343.001114] igb 0000:02:00.0 eth0: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX (In above dmesg snippet the ethernet cable was the whole time inserted). Any tips on how I can debug this further? PS: I already tried a different switch and also a direct connection from device-to-device, without a switch.
