> On 16 Jan 2020, at 12:12, Hans Petter Selasky <hps at selasky.org> wrote: > > On 2020-01-16 11:07, Daniel Braniss wrote: >>> On 16 Jan 2020, at 11:16, Hans Petter Selasky <hps at selasky.org> wrote: >>> >>> ktracing >> wrote a small c program, that just opens and tries to read, the open fails with >> ??open: Device not configured? >> and the console shows: >> Jan 16 11:59:09 neo-black-1 kernel: umodem0: detached >> Jan 16 11:59:14 neo-black-1 kernel: ugen5.2: <SM SM-2D PRODUCT USB UART> at usbus5 >> Jan 16 11:59:14 neo-black-1 kernel: umodem_probe: >> Jan 16 11:59:14 neo-black-1 syslogd: last message repeated 1 times >> Jan 16 11:59:14 neo-black-1 kernel: umodem0 on uhub5 >> Jan 16 11:59:14 neo-black-1 kernel: umodem0: <SM SM-2D PRODUCT USB UART, class 2/0, rev 1.10/1.00, addr 2> on usbus5 >> Jan 16 11:59:14 neo-black-1 kernel: umodem0: >> Jan 16 11:59:14 neo-black-1 kernel: data interface 1, has no CM over data, has no break >> Jan 16 12:01:52 neo-black-1 kernel: umodem_cfg_set_dtr: onoff=1 >> Jan 16 12:01:52 neo-black-1 kernel: umodem_cfg_set_rts: onoff=1 >> Jan 16 12:01:53 neo-black-1 kernel: umodem0: at uhub5, port 1, addr 2 (disconnected) >> Jan 16 12:01:53 neo-black-1 kernel: umodem_detach: sc=0xd494c400 >> Jan 16 12:01:54 neo-black-1 kernel: umodem_cfg_set_break: onoff=0 >> Jan 16 12:01:54 neo-black-1 kernel: umodem0: detached >> Jan 16 12:02:01 neo-black-1 kernel: umodem_probe: >> Jan 16 12:02:01 neo-black-1 syslogd: last message repeated 1 times >> Jan 16 12:02:01 neo-black-1 kernel: umodem0 on uhub5 >> Jan 16 12:02:01 neo-black-1 kernel: umodem0: <SM SM-2D PRODUCT USB UART, class 2/0, rev 1.10/1.00, addr 2> on usbus5 >> Jan 16 12:02:01 neo-black-1 kernel: umodem0: data interface 1, has no CM over data, has no break > > Can you put a sleep call in your c-program, like 1 second? > > --HPS63549 a.out CALL openat(AT_FDCWD,0x1045b,0x2<O_RDWR>) 63549 a.out NAMI "/dev/ttyU0" 63549 a.out RET openat -1 errno 6 Device not configured 63549 a.out CALL nanosleep(0xbfbfec20,0xbfbfec10) 63549 a.out RET nanosleep 0 63549 a.out CALL writev(0x2,0xbfbfe408,0x4) 63549 a.out GIO fd 2 wrote 28 bytes "open: Device not configured and the console: Jan 16 12:17:14 neo-black-1 kernel: umodem_cfg_set_dtr: onoff=1 Jan 16 12:17:14 neo-black-1 kernel: umodem_cfg_set_rts: onoff=1 Jan 16 12:17:15 neo-black-1 kernel: umodem0: at uhub5, port 1, addr 2 (disconnected) Jan 16 12:17:15 neo-black-1 kernel: umodem_detach: sc=0xd494c400 Jan 16 12:17:16 neo-black-1 kernel: umodem_cfg_set_break: onoff=0 Jan 16 12:17:16 neo-black-1 kernel: umodem0: detached Jan 16 12:17:23 neo-black-1 kernel: umodem_probe: Jan 16 12:17:23 neo-black-1 syslogd: last message repeated 1 times Jan 16 12:17:23 neo-black-1 kernel: umodem0 on uhub5 Jan 16 12:17:23 neo-black-1 kernel: umodem0: <SM SM-2D PRODUCT USB UART, class 2/0, rev 1.10/1.00, addr 2> on usbus5 Jan 16 12:17:23 neo-black-1 kernel: umodem0: data interface 1, has no CM over data, has no break