Unsteady Ethernet Connection with RTL8111/8168/8411 since Tails 4
a user reported that with tails 4, and with every version released since then, Tails notify the user that Tor is connected, then the connection drops and network manager display a "no connection" icon. after a few seconds the connection is up again, then drops, and again and again.
the issue was not there in tails 3.*
the ethernet adapter is
03:00.0 Ethernet controller : Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 11)
disabling mac spoofing does not help.
apparently if a software using internet is started the connection is not dropping anymore
before tails 4, the connection rate was limited to 100MB/s, but since then it is marked as 1000MB/s. setting manually the connection to 100MB/s (with ethtool) solve the issue.
- Status changed from New to Rejected
I misunderstood, in fact, the connection drops from the moment it is used
FWIW, I'm not sure how to conciliate this with "Tails notify the user that Tor is connected, then the connection drops": tor does use the network to connect.
apparently it is caused by a weird configuration on the modem of the user (one ethernet port was set to 100MB/s), apparently tails 3 and Ubuntu set the ethernet rate to 100MB/s automatically, but Tails 4 seems not to do so.
Looking this up online I indeed see lots of problems with speed auto-negotiation with this network card.
- the rather uncommon setup
- the user found a workaround that works for them already
- that workaround assumes too much tech skills to be generally useful
… I don't think we should spend time documenting this workaround.