Hopefully someone can point me in the right dirrection here.

We have a situation where we have:
CC&C technologies zd1211b device (0x0ace::0x1215)
ASUS motherboard with USB2.0 support
Linux Kernel 2.4.31

We deactivate USB2.0 support in the bios, and do not load the appropriate
kernel driver.  
However, if I leave the device in MIXED (ad-hoc) mode, I can watch the
bitrate jump between 11Mb/s and 54Mb/s.  
While it doing this, the two devices we have ad-hoced loose communication
with eachother.

Now, if I use iwpriv's set_mac_mode and force the device into PURE_B mode, I
get 100% 'invalid misc' packets.
If we plug the device into a motherboard that is USB1.1 only, it behaves
correctly. 

Anyone have any ideas here? Shouldn't the device stay away from G mode
completely if the bus has been set to 1.1?

Thanks for any help.
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