Ethernet connection repeatedly disconnects.

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mick1964mint
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Joined: Fri Nov 13, 2020 12:50 pm

Ethernet connection repeatedly disconnects.

Post by mick1964mint »

Running 20.04 on a Dell 7010 pc. Network connection often drops. I click on a link or web-page and it fails to load. New tabs come up blank. After a few minutes the service resumes. This happens frequently and it is becoming rather boring as it often disconnects during paying for things, for example :oops:

I have another drive with Windows 10 on the same pc-doesn't happen there.
Note-this is LAN not WIFI, which is covered in other posts.
I have recently begun to wonder if this is some sort of power-saving option somewhere. Any suggestions, please?
Thank you!
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
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Peter_Minty
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Joined: Mon Mar 29, 2021 9:35 am

Re: Ethernet connection repeatedly disconnects.

Post by Peter_Minty »

Perhaps I shouldn't comment. I have something similar on a Dell laptop
Broadcom and subsidiaries NetXtreme BCM5755M Gigabit Ethernet PCI Express vendor: Dell driver: tg3 v: 3.137 port: 10c0 bus ID: 09:00.0 chip ID: 14e4:1673 IF: enp9s0 state: down mac: <filter>
My clues are it sticks/halts in Firefox with a message saying TLS which I gather is SSL certificates. Sometimes the connection seems ok and then the next moment it stalls. I can Ping my router and sometimes an external site will not Ping. Most odd. The computer works 100% on Wi-Fi. I just wonder if there is a hardware fault like a wonky ethernet socket.

Just thoughts.
kelebek333
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Joined: Sat Jun 25, 2011 11:57 am

Re: Ethernet connection repeatedly disconnects.

Post by kelebek333 »

You can try to disable IPV6 with following commands.

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echo -e "#IPV6 disable\nnet.ipv6.conf.all.disable_ipv6 = 1\nnet.ipv6.conf.default.disable_ipv6 = 1\nnet.ipv6.conf.lo.disable_ipv6 = 1" | sudo tee /etc/sysctl.d/10-disable-ipv6.conf

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sudo sysctl -p /etc/sysctl.d/10-disable-ipv6.conf

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sudo systemctl restart NetworkManager


You can restore IPV6 with following if you want.

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sudo rm -f /etc/sysctl.d/10-disable-ipv6.conf

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sudo sysctl -w net.ipv6.conf.all.disable_ipv6=0 net.ipv6.conf.default.disable_ipv6=0 net.ipv6.conf.lo.disable_ipv6=0

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sudo systemctl restart NetworkManager
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