Hi, I'm having a strange issue with a CH340 usb-serial IC : I can only use/open it once. Here's what I try: **** $> stty -F /dev/ttyUSB0 -a speed 0 baud; rows 0; columns 0; line = 0; intr = <undef>; quit = <undef>; erase = <undef>; kill = <undef>; eof = <undef>; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = <undef>; stop = <undef>; susp = <undef>; rprnt = <undef>; werase = <undef>; lnext = <undef>; discard = <undef>; min = 0; time = 0; -parenb -parodd -cmspar cs5 -hupcl -cstopb -cread -clocal -crtscts -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -ixon -ixoff -iuclc -ixany -imaxbel -iutf8 -opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0 -isig -icanon -iexten -echo -echoe -echok -echonl -noflsh -xcase -tostop -echoprt -echoctl -echoke -extproc $> stty -F /dev/ttyUSB0 -a stty: /dev/tty/USB0: Input/output error $> lsof | grep "ttyUSB" [nothing] $> **** The only solution is to unplug+replug the IC; any code using open() will fail with the same error. lsusb output: Bus 002 Device 002: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter I tried only on kernels 4.0.6 and 4.1.6, system is archlinux x86-64. Am I alone having this problem ? Thanks ! -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
