Can you please try to Hibernate your laptop to disk, then start it again and test the LAN connection? On my Fujitsu S7311 with I219-LM with Ubuntu kernel 5.11.0-18-generic hibernating running OS to disk and then turning it on makes LAN working as expected without any error (no special kernel parameters). Very strange behaviour.
Can you please try to Hibernate your laptop to disk, then start it again and test the LAN connection? On my Fujitsu S7311 with I219-LM with Ubuntu kernel 5.11.0-18-generic hibernating running OS to disk and then turning it on makes LAN working as expected without any error (no special kernel parameters). Very strange behaviour.