Turning of TSO seems to alleviate the problem here too. It seems to work fine as long as I don't address the VLAN 99, but as soon as I get traffic through the VLAN I see those Hardware Unit Hang quite often. I use the interface untagged and with one VLAN tag 99. I see the same thing since quite a while on a Lenovo T431s with various Arch Linux kernels. If I turn off tso (ethtool -K eno1 tso off), the problem goes away. br0: port 1(eno1.11) entered forwarding state br0: port 1(eno1.11) entered blocking state br0: port 2(eno1.10) entered forwarding state br0: port 2(eno1.10) entered blocking state e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None br0: port 1(eno1.11) entered disabled state br0: port 2(eno1.10) entered disabled state Every few minutes, it hangs with a message like this: It's not particularly loaded (it takes my home network), but it has two VLANs on a bridge. I have an Atom system with an onboard e1000e. ![]() ![]() I've seen this with a lot of kernels (mainline), but I only got to report it until now, on a Debian kernel.
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