Tried them all already
the command is:
mii-tool -F <type> ethX
where type could be (according to "mii-tool --help"): 100baseT4, 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD
as i understand you think its a physical connection problem rather than driver/kernel one, unfortunately all the physical parts where checked over and over, cable is working 100%, network card is working, switch is working, switch port is working, the gateway network is working.
is there any place to find if there are available patches for the tulip driver ?