Solved my Ubuntu internet problem

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Solved my Ubuntu internet problem

Started today, out of nowhere!

PCInk

9:38 pm on Feb 1, 2021 (gmt 0)

For a long time of at least 5 years possibly more, I've had my computer connected via Ethernet to the router. To the same router, a WiFi connection as well. They are both connected and have not been an issue.

Today for no reason I can see, they no longer like each other. After lots of experimentation and changing of settings I discovered something:

They both work. But only if one is connected.

When both are connected there is no internet that I can use. Pinging doesn't work, DNS doesn't work. Make one active and it doesn't matter which - everything works fine. So I've set all connections to not connect automatically except for one.

Does anyone know why this would be? It has never been a problem before to have two connections active.

lammert

9:43 pm on Feb 1, 2021 (gmt 0)

Do you use fixed IP addresses or DHCP? If the latter, move to fixed IP addresses. There may be a conflict about a DHCP lease.

PCInk

8:56 pm on Feb 25, 2021 (gmt 0)

I do use fixed IP addresses. A different one for each connection, example: 192.168.0.50 for the wired and 192.168.0.51 for the wireless. The router does have DHCP enabled but that has never been an issue before and I manually set all devices with a fixed IP.

There appears to be no updates to the router but there are Ubuntu updates and this started as soon as I rebooted the computer. That makes me think it is Ubuntu or the computer rather that the router.

Very odd.