Δοκίμασε να κάνεις αυτά που λέει ο τύπος εδώ:
I had the same problem when I first started with Ubuntu about 6 months ago and this is the only solution I found that worked.
I forget exactly where I came across this, but here it is:
create a file containing this:
#!/bin/sh -e
#
# Fixes rt2500 speed problem
#
if [ "$IFACE" = "wlan0" ] ; then
iwconfig wlan0 rate 54M
fi
name it "ralink-fix" (without the quotations), make it executable (an option when you save the file), and put it in the directory "/etc/network/if-up.d/" .
(I had to create the file in my "home" directory and move the file using root access via the terminal: "sudo mv ralink-fix /etc/network/if-up.d/" (again, no quotations)
