Likewise, this fixes all problems I had with my i82573E on an intel
D945GTP motherboard.  Not only does media autosense work, but now
full-duplex works with my cable modem without a hideous slowing of
traffic:  Previously, i would get up to 2MiB/s with half-duplex and
only up to maybe 100KiB/s with full-duplex.  Now, full-duplex is
somewhat faster, as it should be.  Many thanks for this fix, as now I
can plug my machine into different devices without trying 2^6
combinations of flags. ;)

I am curious as to why I had this problem with full-duplex mode,
despite setting it manually.

Regards,

--Blair

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