[quote=“pablo, post:10, topic:8068, full:true”]
I bought a new TP-LINK TG-3468 network adapter for PC 2. I connected it as a LAN and it looks ok. [/quote]
This completely screw up my theory. The adapter has Realtek chip onboard.
Therefore, question become:
Why this kind of card has crappy performance?
Indeed, that’s not a news. Searching for “82541PI slow network” plenty of linux installations/distros seems to not manage quite well this kind of chipset.
Some posts reported 10mbit negotioation with the switch, others a sort of unreliability of the connection (falls, come back online, stays online 3-4 secs, then falls again).