At 5:35 PM -0500 12/5/04, Tim Kelly wrote:
>>I'm not sure if the am79c950.c routines were
>>getting picked up or the caller was just bailing. In any event, I recall
>>that there was a problem on early PCI Macs that the AAUI connector had
>>priority over the 10BaseT connection, so if either IFM_MANUAL was used or
>>the media change routine wasn't properly linked, the chip probably
>>defaulted to AAUI. I made the API match on the two routines and made the
>>default be 10BaseT. I left the old stuff in and put the new stuff inside
>>#ifdef IFM, so you can test before and after.
>
>Well, since this kept bothering me, and since I'm a bit spooked from seeing
>traffic on sip*, I'm going back and dotting my t's and crossing my i's. I'm
>not sure exactly what the real fix is, but I can say that it works.
>
>With GENERIC, if I specify the media type (10BaseT) in /etc/ifconfig.mc0,
>the interface is sluggish. If I undo my patch via commenting out IFM, and
>leave 10BaseT in /etc/ifconfig.mc0, the interface is sluggish. In both
>cases, I get the ifconfig: SIOCSIFMEDIA: Invalid argument message. However,
>if I then ifconfig manually without specifying the media type on my MP
>kernel with everything else I've done except the mc patch, the interface
>comes up just fine. If I do this with GENERIC, there is no difference. If I
>boot without the media 10BaseT argument in /etc/ifconfig.mc0, in neither
>case does manually bringing up the interface work.
>
>If I boot my MP kernel and whether I specify 10BaseT or not, it comes up
>just fine, and because of how I set the default, it comes up 10BaseT when
>it is not specified.
>
>I think the problem has something to do with how the am79c950.c code
>initializes the chip when the media type is invalid. With the patch I
>posted, the media change and status routines are ensured they are the ones
>already in if_mc.c, and it seems to work. I just can't specifically
>identify the exact difference. If this patch fails to fix other mc*
>devices, please let me know.
>
>thanks,
>tim

I know it's been quite a while since this reply, but the same error saying Invalid argument after
you try specifying media mc* for example:
-bash-3.00$ su
bash-3.00# ifconfig mc0 media 10baseT
ifconfig: SIOCSIFMEDIA: Invalid argument
that caused me a lot of grief when I was netbooting my macppc 9500 using 
>boot enet:,ofwboot.xcf
and trying to extract sets from nfs which asked me for mc0 media on nfs client config during
setup. I was wondering if this issue was resolved back then at all..
thanks
tom



		
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