In article <20050428022246.4CD033BFE4D@berkshire.machshav.com>,
Steven M. Bellovin <smb@cs.columbia.edu> wrote:
>In message <861x8wt6e9.fsf@athene.hamartun.priv.no>, Tom Ivar Helbekkmo writes:
>>"Steven M. Bellovin" <smb@cs.columbia.edu> writes:
>>
>>> I have a Thinkpad T42 with a wm GigE card.  I've never tried it at
>>> GigE speeds; it runs fine at 100 Mbps.  But it doesn't work at 10
>>> Mbps if I have it set to 'media autoselect'.  However, if I set it
>>> to 'media 10baseT', it works.
>>
>>I have one of those laptops as well.  I haven't tried it at 10 Mbps,
>>but I had to quit letting it autoselect against our Cisco GigE capable
>>switch, because it would negotiate 1 Gbps and full duplex -- after
>>trying for about two minutes.  Every time something happened to the
>>interface, such as me putting it into promiscuous mode with tcpdump,
>>there would be another two minute wait for the autoselect.
>>
>
>Hmm -- I haven't tried waiting two minutes...  But I've seen a number 
>of postings that suggest that disabling autonegotiation is a bad idea, 
>because some devices can't work any other way.
>

Please file a PR. Drivers that issue a reset to enter and exit promiscuous
mode should be fixed where possible.

christos