[PLUG] Network troubleshooting help (urgent)

wes plug at the-wes.com
Tue Dec 17 22:12:47 UTC 2019


Ok, yes, the detail about moving the cable back to the laptop after you
found it didn't work in the dock was missed. The next step would be to
unplug the dock and see if it starts working then. Maybe with a reboot for
good measure.

-wes

On Tue, Dec 17, 2019 at 2:06 PM John Jason Jordan <johnxj at gmx.com> wrote:

> I must not have made things clear.
>
> Yesterday the ethernet cable was plugged directly into the computer,
> not the dock. And it worked. I never tried it in the dock.
>
> Today after moving the computer, I re-snaked all the cables through the
> tunnels that I built under my desk, then connected them all to the dock
> and connected the dock to the computer. Everything was working except
> no ethernet and no wifi. Then I took the ethernet cable out of the dock
> and plugged it into the computer just like it was connected yesterday,
> but still no ethernet.
>
> Then I replaced the cable, but still no connection. The green light
> is lit up on the dock or the computer, depending on which device it is
> plugged into, and the light is solid green. I am guessing that solid
> green means no activity.
>
> I also tried lshw -c network. It shows:
>         *network UNCLAIMED
>                 description: Network controller
>                 <more stuff too long to retype here>
>         *network
>                 description: Ethernet interface
>                 <more stuff too long to retype here>
>
> I suspect that the wifi needs a newer driver, but it's hard to deal
> with that until I get ethernet working.
>
>
> On Tue, 17 Dec 2019 13:32:53 -0800
> wes <plug at the-wes.com> dijo:
>
> >Try plugging the network cable into the Thinkpad's built-in ethernet
> >port instead of the dock's?
> >
> >The interfaces being missing is usually due to drivers, especially for
> >wireless hardware. The fact that the dock's ethernet interface worked
> >on the old system with the same OS is curious though.
> >
> >-wes
> >
> >On Tue, Dec 17, 2019 at 1:14 PM John Jason Jordan <johnxj at gmx.com>
> >wrote:
> >
> >> I am sitting here with my new Thinkpad P73, and no internet.
> >>
> >> Yesterday I had not yet shut down and removed my old computer, so the
> >> Thinkpad was connected directly to the cable. Ethernet worked then,
> >> but wifi did not exist. At the command line ifconfig just showed
> >> eth0 (now called enp0s31f6) and lo (loopback). As long as the cable
> >> was working I decided to leave wifi for later.
> >>
> >> Just now I shut down the old computer and put the Thinkpad in its
> >> place on my desk. I carefully plugged everything into the Lenovo
> >> Thunderbolt3 dock and then connected the dock to the Thinkpad.
> >> Everything is working except both ethernet and wifi are now dead. At
> >> the command line ifconfig still shows enp0s31f6, but it is not
> >> connected. I tried sudo ifconfig enp0s31f6 up, which executed
> >> without error, but still no connection. I can't ping anything on my
> >> network ('network is unreachable'). As before, wifi still does not
> >> exist.
> >>
> >> There is a green light where the cable connects to the dock, or at
> >> the computer if I connect it directly. However, the light is solid,
> >> not flashing as it usually does. I also replaced the cable, even
> >> though the green light probably indicates a good connection.
> >>
> >> I rebooted and looked all over the BIOS for some setting that might
> >> have turned off wifi, but found nothing. Years ago I had a computer
> >> that wouldn't connect to wifi until I found a physical switch that
> >> was on 'airplane mode.' On this computer there is no such switch,
> >> nor can i find a keyboard button with an airplane on it, or anything
> >> else that looks promising.
> >>
> >> I am writing this on my desktop computer. I really need the Thinkpad
> >> to connect!
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> >>
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