Download the latest experimental build of android-wifi-tether 3.1-pre101.
Under the settings menu change the device profile to motorola targa. Enable wifi encryption.
Works flawlessly on mine so far.
Sent from my DROID RAZR using Tapatalk
Edit: I just realized you were using barnacle instead of android-wifi-tether. But if you choose here's how I got android-wifi-tether to work for me.
I had the same issue with my macbook pro.
Through adb shell:
mkdir /sdcard/androd.tether
cat /system/etc/firmware/fw_bcm4329.bin >...
I've been trying for a couple days now with no success. I'm even using the Kingston class 4 4GB SD card. My drivers and everything seem in order and I've got my timing down on the screen flicker.
I've seen some speak of downgrading. Would that be my next option?