Comment 14 for bug 1798833

After coming back from the weekend, the issue is now also occurring on the 4.15.0-20 kernel. I am not sure what is up. I had tried the 4.15.0-22 and 4.15.0-36 kernels, prior to booting up 4.15.0-20 again. In this particular machine, I had tried resetting the power saving settings of the network card from a Windows install, per bug that could be related: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1785171

To make this issue ever more confusing, we have another DELL 7060 running 4.15.0-36 where the network card is working perfectly and the issue has not come up at all.

From my latest test on 4.15.0-20 and some discussion with TJ- in IRC, he asked me for some output to look at sysfs output from the card. Here it is:

root@ae-abcd-400000:~# uname -a
Linux ae-abcd-400000 4.15.0-20-generic #21~16.04.1-Ubuntu SMP Wed Apr 25 02:42:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
root@ae-abcd-400000:~# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.226 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.215 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.170 ms
^C
--- 192.168.1.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2045ms
rtt min/avg/max/mdev = 0.170/0.203/0.226/0.029 ms
root@ae-abcd-400000:~# apt udpate
E: Invalid operation udpate
root@ae-abcd-400000:~# apt update
Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Get:2 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Get:3 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]
Get:4 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Get:5 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [868 kB]
Get:6 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [776 kB]
Get:7 http://us.archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [353 kB]
Get:8 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [696 kB]
Get:9 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [638 kB]
Get:10 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe Translation-en [282 kB]
Get:11 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [573 kB]
Get:12 http://security.ubuntu.com/ubuntu xenial-security/main i386 Packages [493 kB]
91% [12 Packages 92.5 kB/493 kB 19%]^C
root@ae-abcd-400000:~# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=1068 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=1001 ms
^C
--- 192.168.1.1 ping statistics ---
3 packets transmitted, 2 received, 33% packet loss, time 2032ms
rtt min/avg/max/mdev = 1001.626/1034.993/1068.361/33.383 ms, pipe 2

/sys/class/net/eno1/statistics/collisions=0
/sys/class/net/eno1/statistics/multicast=2
/sys/class/net/eno1/statistics/rx_bytes=4904919
/sys/class/net/eno1/statistics/rx_compressed=0
/sys/class/net/eno1/statistics/rx_crc_errors=12
/sys/class/net/eno1/statistics/rx_dropped=0
/sys/class/net/eno1/statistics/rx_errors=24
/sys/class/net/eno1/statistics/rx_fifo_errors=0
/sys/class/net/eno1/statistics/rx_frame_errors=0
/sys/class/net/eno1/statistics/rx_length_errors=0
/sys/class/net/eno1/statistics/rx_missed_errors=0
/sys/class/net/eno1/statistics/rx_nohandler=0
/sys/class/net/eno1/statistics/rx_over_errors=0
/sys/class/net/eno1/statistics/rx_packets=3306
/sys/class/net/eno1/statistics/tx_aborted_errors=0
/sys/class/net/eno1/statistics/tx_bytes=74577
/sys/class/net/eno1/statistics/tx_carrier_errors=0
/sys/class/net/eno1/statistics/tx_compressed=0
/sys/class/net/eno1/statistics/tx_dropped=0
/sys/class/net/eno1/statistics/tx_errors=0
/sys/class/net/eno1/statistics/tx_fifo_errors=0
/sys/class/net/eno1/statistics/tx_heartbeat_errors=0
/sys/class/net/eno1/statistics/tx_packets=924
/sys/class/net/eno1/statistics/tx_window_errors=0