Re: Natsemi ethernet 'cable magic' fix can cause problems

[Marcelo Tosatti]

On Thu, May 13, 2004 at 10:03:58AM -0700, Tim Hockin wrote:
> On Thu, May 13, 2004 at 11:35:03AM +0100, Colin Paton wrote:
> > The problem was strange - about 30% packet loss was experienced during
> > pings. Moving the box to a different ethernet wall outlet (but still
> > using the same port on the switch) cured the problem. The problem
> > therefore appeared to be cable dependant.
> > 
> > It would appear that the call to 'do_cable_magic()' in
> > drivers/net/natsemi.c causes the problem to occur.
> > 
> > It looks as though this was added in to actually *fix* such problems...
> > but in our case it made things worse.
> 
> I'm the responsible party on that one.  do_cable_magic() was a direct
> result of a significant amount of work with National's engineers to
> root-cause some major problems we had had.
> 
> If I recall, the problem we experienced was when the cable was "short"
> (where short was < 30m, I think).  What can you tell me about your cabling
> setup?
> 
> Willing to test?  Ping me back.

Hi Tim, Collin,

Did you made any progress on this issue?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/