Lenovo I219-V e1000e device has severe RX checksum errors
From: Joakim Tjernlund <hidden>
Date: 2021-05-27 15:03:54
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (13) I219-V (rev 20) Subsystem: Lenovo Ethernet Connection (13) I219-V This device is in newer Lenovo laptops like T14 gen2 Under Linux(Windows seems OK) this device sever network problems and is almost unusable Turning off HW optimizations: ethtool -K eth0 rx-checksumming off tx-checksumming off ethtool -K eth0 scatter-gather off ethtool -K eth0 receive-hashing off ethtool -K eth0 rx-vlan-offload off tx-vlan-offload off Makes the RX checksums go away but networking still suffers Ping times on a local network varies wildly, > 100 ms in some cases Googling around this seem like a common problem for Lenovo T14 gen 2 Jocke