I am using a Pentium III class computer (older computer) with OpenSUSE 11.1 When I try to upload a sketch I get the error "avrdude stk 500_recv():programmer is not responding". Please help. . Also when I go to the Serial Port I get /dev/ttyS0 and /dev/ttyS1. Shouldn't I see /dev/ttyUSB0 ? Maybe I haven't installed the drivers? But I don't see where the drivers are to install. Also I am running the program as root so I should have access to the USB ports. In any case I executed the command usermod -A root uucp. But I still can't upload to the machine
Are you member of the UUCP group ?
To get access to serial (and virtual serial ports), this must be the case. You can quickly check your group membership by typing the following command in a console:
id <username>
with replaced with whatever is correct for your account.
For further information have a look at this.