netdev - r8169 - it's dead jim

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Message-ID: <529105F8.9030901@nurealm.net>
Date:	Sat, 23 Nov 2013 12:46:00 -0700
From:	James Feeney <james@...ealm.net>
To:	Realtek and the Linux r8169 crew <netdev@...r.kernel.org>
Subject: r8169 - it's dead jim

Hey

Going from 3.12.0-1-ARCH to 3.12.1-1-ARCH, the r8169 module is having the "link
detect" problem again.

Initially, "ethtool -s <blah> autoneg off" gives "invalid argument".

"sudo mii-tool -R enp22s0" - Reset the MII to its default configuration - will
allow a 10Mb/s half duplex connection, with "autoneg off".

"ethtool -s <blah> autoneg off" then will work, after the "mii-tool -R <blah>".

After some time, Auto-negotiation will spontaneously go on, and a 100Mb/s full
duplex connection will come up, on a 1Gb/s interface.  Subsequent unplugging and
plugging the cable gives a 1Gb/s full duplex connection.

This problem has been recurring for so many years, I hope the solution is
something obvious, perhaps a recent change to the kernel?

Thanks
James
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