On Wed, 10 Nov 2010, Pyun YongHyeon wrote:
On Tue, Nov 09, 2010 at 01:34:21PM -0800, Pyun YongHyeon wrote:
On Tue, Nov 09, 2010 at 10:01:36PM +0100, Yamagi Burmeister wrote:
On Tue, 9 Nov 2010, Pyun YongHyeon wrote:
No, the link stays at 1000Mbps so the driver must manually switch back
to 10/100Mbps.
Hmm, this is real problem for WOL. Establishing 1000Mbps link to
accept WOL frames is really bad idea since it can draw more power
than 375mA. Consuming more power than 375mA is violation of
PCI specification and some system may completely shutdown the power
to protect hardware against over-current damage which in turn means
WOL wouldn't work anymore. Even if WOL work with 1000Mbps link for
all nfe(4) controllers, it would dissipate much more power.
Because nfe(4) controllers are notorious for using various PHYs,
it's hard to write a code to reliably establish 10/100Mbps link in
driver. In addition, nfe(4) is known to be buggy in link state
handling such that forced media selection didn't work well. I'll
see what could be done in this week if I find spare time.
Hmm... Maybe just add a hint to the manpage that WOL is possible broken?
I think this may not be enough. Because it can damage your hardware
under certain conditions if protection circuit was not there.
Ok, I updated patch which will change link speed to 10/100Mps when
shutdown/suspend is initiated. You can get the patch at the
following URL. Please give it a try and let me know whether it
really changes link speed to 10/100Mbps. If it does not work as
expected, show me the dmesg output of your system.
http://people.freebsd.org/~yongari/nfe/nfe.wol.patch2
Okay, that does the trick. At shutdown the link speed is changed to
10/100Mbps, at boot - either via WOL magic packet or manuell startup -
it's changed back to 1000Mbps.
Thanks again,
Yamagi
--
Homepage: www.yamagi.org
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