Intermittent NIC on Dell Optiplex 9020 Ubuntu 20.04.3 LTS

Rufus T. Firefly

6/7/23, 3:38 AM

The problem is that the NIC drops out intermittently every few minutes.

Similar questions have been answered on this problem, but the answers involve changing settings in Windows.

This computer has Ubuntu 20.04.3 LTS and nothing else. I tried a different computer running Ubuntu 20.04.3 LTS on the same network drop and did not have this problem.

I also tried running a different Debian distro on this computer and had the same problem.

The switch should be auto-negotiate, but makes me wonder because the speed is showing 10Mbps and not 100Mbps.

Output of sudo lshw -C network:

  *-network                 
       description: Ethernet interface
       product: Ethernet Connection I217-LM
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       logical name: eno1
       version: 04
       serial: 64:00:6a:92:a3:89
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz

       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation

       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.11.0-27-generic duplex=full firmware=0.13-4 ip=192.168.1.110 latency=0 link=yes multicast=yes port=twisted pair speed=10Mbit/s

       resources: irq:27 memory:f7c00000-f7c1ffff memory:f7c3d000-f7c3dfff ioport:f080(size=32)

0 + 0

networking

dell

nic

20.04

chili555

6/7/23, 1:59 PM

Does the problem persist with a different LAN port on the router or switch? With a known good cable? Are there any clues in the log? `sudo dmesg | grep eno1' Please edit your question to show the result. Welcome to Ask Ubuntu.

heynnema

6/7/23, 4:47 PM

It looks like a bad cable, as your link "size: 10Mbit/s", or the hub/switch/router/modem isn't capable of more (unusual). Use a cat 5e or cat 6 cable. Start comments to me with @heynnema or I'll miss them.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Intermittent NIC on Dell Optiplex 9020 Ubuntu 20.04.3 LTS

TH: Intermittent NIC on Dell Optiplex 9020 Ubuntu 20.04.3 LTS

RO: Intermittent NIC on Dell Optiplex 9020 Ubuntu 20.04.3 LTS

RU: Intermittent NIC on Dell Optiplex 9020 Ubuntu 20.04.3 LTS

VI: Intermittent NIC on Dell Optiplex 9020 Ubuntu 20.04.3 LTS

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.