I get that chip reset all the time, and alot of other warnings too:
Had to be quick to push on print screen, but it warns me for every card. I don't know what to think about it...it seems to hash, but they are not that stable as other miners i had
Yesterday evening i also installed xubuntu side by side on my Windows 7 system.
After the installation of the modified cgminer i also get these 'WARN : /dev/hidrawxx DUP' errors and the hashrate is very unstable.
None of these errors with the Oracle virtualbox session on Windows 7, and also a stable hashrate of 2.5 GH/s.
Also tried it on my Windows 8 system, but can't get it working on that system.