Ethernet Connection no longer Working

[NoWorries]

After returning from a 12 day break on which I had my laptop and also installed updates when available, I found that my system no longer connected to the Internet using the Ethernet connection. I can now only connect using the wireless option.

I originally thought that it was a hardware problem, but after trying an Artful installation usb, I found that it could connect the Internet using the Ethernet connection. I also booted up Windows 7 and found that for it, the Ethernet connection also worked.

So it now looks like something in my software is causing the problem. The ifconfig gives

:~$ ifconfig -a | grep eth
     ether 10:bf:48:9c:3e:3e  txqueuelen 1000  (Ethernet)
     ether dc:85:de:04:64:6d  txqueuelen 1000  (Ethernet)

and the ls command gives

:~$ sudo ls /sys/class/net
enp4s0  lo  wlp3s0

I am wondering if anyone knows what I need to do to resolve this problem?

[GreyGeek]

Unplug your eth cable, Open NetworkManager and delete your wired config. Close NM and plug the cable back in. It should automatically create a new wired config and connect.


Sent from my iPhone using Tapatalk

[woodsmoke]

Hi
I just installed Zesty Zaphod Bebblebox and had wired connexion to do the updates and after a shut down, the ethernet went away.

I di ifconfig and got the same kind of information.

As with the Grey Meister I always think that first it is a hardware problem so I plugged and removed the connexion in manager and replugged and no joy.

The internet is working because I have another machine on the telly that has internet connexion.

I tried wireless and can get on the net with wireless in Zaphod but not wired.

Aaahhh welllll lol

woodLOVESnewOS'ssmoke

[GreyGeek]

This link might be of interest, Woody. There are several solutions given for similar problems, and links to bug reports:

https://ubuntuforums.org/archive/ind...t-2347827.html

[NoWorries]

I decided to do a re-installation as this basically takes me a little over an hour to complete with all the applications, network and driver additions. My system is now working as it should.

My reason for taking this approach was to save time as I had spent some time trying to fix it. Thanks to GreyGeek for the input and I will try that next time it happens to me. Also Woodsmoke, I hope you are able to get your Ethernet working.

[SpecialEd]

Hi
I just installed Zesty Zaphod Bebblebox and had wired connexion to do the updates and after a shut down, the ethernet went away.>>>>>><<<<<<

Too many Pan Galactic Gargle Blasters?

[woodsmoke]

LOL, ummmmm nope!

But...and I am prolly THE ONLY member who has so LITTLE CLASS as to actually ADMIT THIS!!

Since I'm just a hardware kinda guy, to me the first thing is always check the hardware...

Well, who woulda thunk it...

The ethernet cable went kablooy at exactly the same time as installing Kubu...

So, got another cable out and it works fine!! lol

I'll dig my cat 5 crimper and some clips out and redo the cable.

Still leaves not having a left click mousey though. lol

woodcheckthehardwarefirstsmoke

[GreyGeek]

The problem is always at the last place you look. The trick is to look at the last place first!

[Qqmike]

And another confirmation of the classic hardware mantra: "It's the cable, stupid!"
The other day, I had shut down my PC and so had to start it up, got to the Kubuntu log-in, typed my PW and nothing! Wrong PW!? Went insane for awhile and kept repeating what didn't work. Noticed my keyboard lights not on ... keyboard died? Nope, I finally realized it was the Cable Stupid; i.e., the stupid USB keyboard cable had come slightly loose.

Carry on, men!

[woodsmoke]

LOL

wooddoesitsmoke