> > What is the: > Bus 004 Device 008: ID 0764:0501 Cyber Power System, Inc. CP1500 AVR UPS > > device? That's my backup power supply. > >> Should /dev/ttyUSB0 pop up when I plug the adapter into the usb port, >> even before I connect anything to the serial port of the cable? > > Yes. > > What happens in the kernel log when you plug the device into the system? > > Try doing: > dmesg -c > # plug in the adapter now > dmesg > to just see the log messages for that, and not the whole kernel boot > log. > 2) root:~> dmesg -c #plug-in adapter 3) root:~> dmesg Absolutely nothing. I also did tail -f /var/log/messages then plugged in the adapter, and again, everything seems dead. The USB port is ok, because other devices (e.g. the Fushicai video grabber) do work. >> If the adapter is not supported, can I write a driver for it? I'll be happy to, >> with a little guidance to get me started. Any pointers? > > Odds are the device id just needs to be added to an existing driver as > I do not know of any "new" usb-serial converter chips that Linux does > not already support. > Oh, one more thing. Reading about these converters, I saw many use an ftdi chip, so I did modprobed ftdi_elan and ftdi_sio: 7) root:~> lsmod | grep ftdi ftdi_elan 36689 0 ftdi_sio 48770 0 In fact, the dmesg above was with the ftdi modules loaded. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
