On Fri, Aug 29, 2014 at 04:15:25PM +0200, Johan Hovold wrote: > On Sat, Aug 23, 2014 at 12:53:12PM -0500, Sergio De León wrote: > > Hi, I've been trying to get this device work in linux Mint Qiana > > (3.13.0-24-generic) without success. > > > > The XR21V1414 is a multiport USB-UART device. (0x04e2:0x1414) > > (The driver provided "Vizzini" causes system crash due a improper > > initialization of tty_port) > > http://www.exar.com/common/content/default.aspx?id=10296 > > > > The cdc_acm driver creates the proper ttyACMx but there's no > > communication with the device. > > What does the kernel log say when you plug the device in with the > cdc-acm driver loaded? > > An what happens if you enable debugging for the driver and write > something to the device? > > The manufacturer seems to claim compliance with CDC (although some > extra features would be missing) so the cdc-acm driver should work. By the way, have you made sure this is not simply a flow control issue? Depending on your configuration you may have hardware flow control enabled with cdc-acm, but that wouldn't be the case with the generic usb-serial driver. Johan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
