Have a nano (clone) with the ch... driver. Having the issue of not being able to upload a sketch. Is there a way of telling if the bootloader has been programmed into the processor. The Nano is a couple years old, and I can't remember if I ever programmed it before. On power up chip it does blink the LED as if the blink LED sketch had been loaded, but perhaps the mfg just programmed this sketch. That wouldn't make sense as to why though, is it possible that it is missing the bootloader, and is there a way of determining from AVRdude?
Problem solved. I needed to use Tools->Processor-> Atmega328P (old bootloader)