Subject: Re: gem (ERI/GEM/GMAC Ethernet device driver) has problems on macppc
To: Steven M. Bellovin <>
From: Timo Schoeler <>
List: current-users
Date: 10/21/2005 10:16:32
Steven M. Bellovin wrote:
> In message <>, Timo Schoeler writes:
>>i said on a plain dumb SMC 10/100 _hub_ this problem appears. then i 
>>tried the Nortel 450 (_switch) -- this runs fine in full duplex mode. 
>>when i then manually set both the switch (managed) and the G4 to half 
>>duplex, the problem occurs again.
>>when using the SMC _hub_ the machine automatically sets the NIC to half 
>>duplex as it should be.
> In other words, whenver your machine is supposed to use half-duplex, 
> you get these failures, whether the setting is manual or automatic.  I 
> don't know if it's a bug in the chip or the driver, though.  I don't 
> recall all of the details of this thread, but how do other OSs behave?  
> Do any succeed in such a situation? If so, it's probably a driver bug.
> 		--Steven M. Bellovin,

neither Mac OS 'Classic' nor Mac OS X show those errors (for the former 
one i have to check on the switch for CRC errors etc.). NetBSD is the 
only OS having trouble with this.