Public bug reported:
I recently got a Thinkpad T14 Gen2 with a I219-V network adapter
(8086:15fc). I get very slow connection speeds and even total loss of
connectivity without seeing much in the logs (like dmesg etc.). ethtool
reports CRC errors and paket loss. Besides Ubuntu 21.04/kernel 5.11 I
tried to install Ubuntu 20.04 (kernel seems to old) and i tried the
e1000e driver directly from upstream (3.8.7) with no success.
A strange behaviour I observed: if connectivity is lost (notebook is not
reachable via ping from another host), if I do something like "ping
8.8.8.8" on the notebook itself, it becomes reachable from the other
host again.
Downloads in general are very slow if they work at all.
WLAN (AX210) seems to work fine, wired network using a USB-network
adapter works fine, too.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Output ubuntu-bug linux"
https://bugs.launchpad.net/bugs/1927925/+attachment/5496031/+files/report.txt
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https://bugs.launchpad.net/bugs/1927925
Title:
Massive network problems with I219-V on Thinkpad T14 Gen2 (e1000e)
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