try firmware 0703 from CKolivas, that helped me a lot
also, if even after updating firmware there is still the very same problems it implies it is a HW problem
what are all the symptoms? does LAN work? does WIFI work? everything works except the hashing itself - i.e. cgminer?
Yeah, firmware updated.
Connected Directly to USB
I plugged it into an Ubuntu machine and got this in dmesg:
Jul 7 12:29:39 ALOHABOY2 kernel: [188990.652065] usb 1-1: new high-speed USB device number 7 using ehci_hcd
Jul 7 12:29:39 ALOHABOY2 kernel: [188990.784453] usb 1-1: New USB device found, idVendor=0409, idProduct=005a
Jul 7 12:29:39 ALOHABOY2 kernel: [188990.784463] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Jul 7 12:29:39 ALOHABOY2 kernel: [188990.784909] hub 1-1:1.0: USB hub found
Jul 7 12:29:39 ALOHABOY2 kernel: [188990.785065] hub 1-1:1.0: 2 ports detected
/dev/ttyUSB* does not exist on this machine either