So, here is my success story
I tried a few days to get an EDIMAX 7811UN to work on my BBB with Angstrom. The built-in rtl8192cu did not work, compiling realtek driver from source was not helpful as well. An upgrade to image-2013.09.04 changed nothing.
The signal level was very weak and connection was lost, as soon BBB was 3 meters far from my AP.
Finally I got it out with disabling of HDMI.
My thoughts were:
why is there so much over HDMI in dmesg?
HDMI port is near USB …
So, what… I’ve mount the FAT partiotion and change the uEnv.txt to:
Now, EDIMAX works without usb extension cable, seems to be stable and I can put my board in an other room