After suspending desktop computer, wired connection does not work

Jeff91 · 08-22-2019, 06:46 AM

I have a desktop computer plugged into a Neatgear Nighthawk which is a wireless bridge connected to my primary router in a different room.

When I suspend my desktop computer the wired network connection fails to re-establish a connection via network manager on an Ubuntu 18.04 based operating system. Restarting the network manager service does not allow it to reconnect, however restarting my Nighthawk or my PC allows the connection to establish properly again.

Wired network device is listed as:

00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-V

In my lspci output. Open to any suggestions - done a lot of searching around and haven't found a more elegant solution than waiting for a reboot to happen.

frankbell · 08-22-2019, 07:38 PM

Does Bohdi use the traditional network nomenclature or the laughingly-named "predictable interface names."

Have you tried, as root,

Code:

ifconfig eth0 up

or the appropriate Bohdi equivalent (here's a nice PDF cheat sheet if Bohdi uses ip instead of ifconfig)?

Jeff91 · 08-24-2019, 07:36 AM

So

Code:

sudo ifconfig enp0s31f6 up

Doesn't fix it. Here is the output of ifconfig -a when I cannot get a connection:

Code:

docker0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:54:c5:f7:52  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp0s31f6: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::4cbe:ba31:9dcb:c34a  prefixlen 64  scopeid 0x20<link>
        ether 4c:ed:fb:c4:a1:3c  txqueuelen 1000  (Ethernet)
        RX packets 55927197  bytes 29678097889 (29.6 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 91624598  bytes 110427794933 (110.4 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 16  memory 0xf7500000-f7520000

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 2417579  bytes 232623926 (232.6 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2417579  bytes 232623926 (232.6 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp4s0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 80:c5:f2:61:2a:89  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

After restarting my router the wired connection looks like:

Code:

enp0s31f6: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.13  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::4cbe:ba31:9dcb:c34a  prefixlen 64  scopeid 0x20<link>
        ether 4c:ed:fb:c4:a1:3c  txqueuelen 1000  (Ethernet)
        RX packets 55931063  bytes 29679627643 (29.6 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 91628490  bytes 110429434189 (110.4 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 16  memory 0xf7500000-f7520000

business_kid · 08-27-2019, 08:17 AM

What does fix it? A network restart? A card restart? A command (e.g. dhcp restart)?

Jeff91 · 08-27-2019, 01:25 PM

Quote:

Originally Posted by business_kid

What does fix it? A network restart? A card restart? A command (e.g. dhcp restart)?

Restarting the wireless bridge or my PC

business_kid · 08-28-2019, 05:35 AM

How does the wireless bridge come into it? has it listed you as defunct or have you sent junk to it?

I would try and narrow it down, e.g. plug your nic into something else, & suspend/resume. Then examine your box. If it's still good, it's the bridge.