Is this the right mailing list for ttyACM device issues, or should I be contactring the serial device people? Just in case this is the right place, here's the issue. I'm using Linux kernel 3.11.10-100.fc18.x86_64. I'm using termios, among other things, to turn ICANON off and to set both VTIME and VMIN to 0. This should do non-blocking reads that return 0 (something our code always successfully does with ttyS devices) but, with the ttyACM device, the read blocks. Is this expected behaviour for ttyACM devices? -- Dave Mielke | 2213 Fox Crescent | The Bible is the very Word of God. Phone: 1-613-726-0014 | Ottawa, Ontario | http://Mielke.cc/bible/ EMail: Dave@xxxxxxxxx | Canada K2A 1H7 | http://FamilyRadio.org/ -- 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