Analysis indicates that this problem is caused by network interface offloading. I use the following script on startup, though it can probably be simplified to just disable gro: for int in $(ls -1 /sys/class/net/ | egrep "^en"); do
ethtool -K $int rx off tx off sg off tso off gso off gro off
done I don't understand why everyone using the 5921 ESR doesn't have this problem.
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