Re: [PLUG] Kubuntu 22.04 loses network connectivity spontaneously

On Fri, Apr 22, 2022 at 3:25 PM K.S. Bhaskar <ksbhaskar@gmail.com> wrote:

I did a fresh install of Kubuntu 22.04 this morning and a bizarre behavior has me scratching my head. As the machine (a 2017 PC, high end at the time) is used primarily as a server, and occasionally as a desktop, most of the time the monitor is powered down and the wireless mouse is turned off to conserve the battery. Every so often, it loses its network connection. I was watching it from my laptop with a watch ping -c3 xyz , and caught it in the act (machine names and IP address edited):

Every 2.0s: ping -c3 xyz mylaptop: Fri Apr 22 14:33:21 2022

PING xyz(xyz.mydomain.local (<IPv6 address>) 56 data bytes
64 bytes from xyz.mydomain.local (<IPv6 address>): icmp_seq=1 ttl=64 time=0.279 ms

--- xyz ping statistics ---
3 packets transmitted, 1 received, 66.6667% packet loss, time 2026ms
rtt min/avg/max/mdev = 0.279/0.279/0.279/0.000 ms

It loses both its IPv4 address and IPv6 address, and then when we do anything with it, like disconnect and reconnect the network cable, the network comes to life again. We swapped Ethernet cables and the network switch port, and that made no difference. I suppose it could be the network card, but that has been rock solid for the last five years, and until this morning, the machine was running Arch Linux robustly without any hiccups.

I currently have the monitor and mouse powered on in case that has something to do with it.

I have two machines which I upgraded from 20.04 to 22.04 (one two weeks ago, and one this afternoon). Both are rock solid with no hiccups. It's only this one with a fresh install.

Any help is greatly appreciated. This is truly bizarre. Thanks in advance.

Regards
– Bhaskar

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