Ethernet Speed and Duplex

[Joe Grace <jgrace@gmail.com>]

Ok, I am going crazy because I have not been able to figure this out.  
I have googled this like crazy. I have a dsl modem that is connected  
directly to an ethernet card. I can not figure out how to manually  
set the duplex and speed. In the past I have used mii-tool, but when  
I try to use it, it will say "no mii transceivers found". In my  
google searches I found that there were some people who were using  
ethtool. When I try setting the duplex and speed with ethtool it does  
not display a word when I press return and then duplex and speed stay  
the same, even after bringing the interface down and up. For some  
reason with this card auto-negotation is very slow. Can someone point  
me in the right direction? Can I set the duplex and speed in /etc/ 
network/interfaces somewhere on the "auto eth0" line?


Thanks a bunch!
Joe