I had the same problem (bit rate locked to 1 Mbps) and then installed linux-next compat-wireless release (from today, 2010-06-05) as suggested in comment 3. This seems to fix the problem for me.
linux-backports-modules-wireless-karmic-generic version 2.6.31.22.35 did not solve the problem though.
I had the same problem (bit rate locked to 1 Mbps) and then installed linux-next compat-wireless release (from today, 2010-06-05) as suggested in comment 3. This seems to fix the problem for me.
linux-backports -modules- wireless- karmic- generic version 2.6.31.22.35 did not solve the problem though.