On Thu, Mar 08, 2018 at 10:10:47PM +0100, Hans Petter Selasky wrote: > You can try running usbdump to capture USB packets. > > ktrace is also your friend. > > dd if=/dev/input/event0 bs=1 > > Also check ownership of devices, that X.org can read from them. It happens earlier, /dev/input/event0 delivers nothing at all. But usbdump is interesting. I've booted with webcamd disabled, started usbdump and started webcamd. This is what I get: [22]sa# usbdump -v -f 4 00:30:09.379930 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 00 03 00 00 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.382401 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 04 03 09 04 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.382448 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 00 03 00 00 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.385398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 04 03 09 04 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.385439 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 02 03 09 04 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.388398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 12 03 42 00 -- -- -- -- -- -- -- -- -- -- -- -- |..B. | 00:30:09.388434 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 02 03 09 04 12 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 18 bytes 00:30:09.391399 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=20,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 18 bytes 0000 12 03 42 00 79 00 20 00 5A 00 48 00 38 00 35 00 |..B.y. .Z.H.8.5.| 0010 31 00 -- -- -- -- -- -- -- -- -- -- -- -- -- -- |1. | 00:30:09.391474 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 00 03 00 00 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.394398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 04 03 09 04 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.394435 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 00 03 00 00 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.397398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 04 03 09 04 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.397436 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 01 03 09 04 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.400398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 14 03 42 00 -- -- -- -- -- -- -- -- -- -- -- -- |..B. | 00:30:09.400433 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 01 03 09 04 14 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 20 bytes 00:30:09.403398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=20,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 20 bytes 0000 14 03 42 00 59 00 5A 00 48 00 59 00 59 00 5A 00 |..B.Y.Z.H.Y.Y.Z.| 0010 48 00 59 00 -- -- -- -- -- -- -- -- -- -- -- -- |H.Y. | 00:30:09.403440 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 00 03 00 00 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.406398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 04 03 09 04 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.406437 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 00 03 00 00 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.409397 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 04 03 09 04 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.409434 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 03 03 09 04 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.412398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 1A 03 1A 00 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.412434 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 03 03 09 04 1A 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 26 bytes 00:30:09.415398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=28,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 26 bytes 0000 1A 03 1A 00 95 00 50 00 33 00 39 00 31 00 31 00 |......P.3.9.1.1.| 0010 06 00 32 00 33 00 39 00 38 00 -- -- -- -- -- -- |..2.3.9.8. | 00:30:09.420243 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 00 03 00 00 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.422400 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 04 03 09 04 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.422441 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 00 03 00 00 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.425398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 04 03 09 04 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.425436 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 03 03 09 04 04 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 4 bytes 00:30:09.428398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 4 bytes 0000 1A 03 1A 00 -- -- -- -- -- -- -- -- -- -- -- -- |.... | 00:30:09.428436 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 03 03 09 04 1A 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 26 bytes 00:30:09.431398 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=28,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 26 bytes 0000 1A 03 1A 00 95 00 50 00 33 00 39 00 31 00 31 00 |......P.3.9.1.1.| 0010 06 00 32 00 33 00 39 00 38 00 -- -- -- -- -- -- |..2.3.9.8. | 00:30:09.431941 usbus0.4 SUBM-CTRL-EP=00000000,SPD=FULL,NFR=1,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 21 0A 00 00 00 00 00 00 -- -- -- -- -- -- -- -- |!....... | 00:30:09.433396 usbus0.4 DONE-CTRL-EP=00000000,SPD=FULL,NFR=1,SLEN=0,IVAL=0,ERR=STALLED frame[0] WRITE 8 bytes 00:30:09.433442 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 81 06 00 22 00 00 FB 00 -- -- -- -- -- -- -- -- |...".... | frame[1] READ 251 bytes 00:30:09.439403 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=252,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 251 bytes 00:30:09.447376 usbus0.4 SUBM-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 A1 01 02 03 00 00 02 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 2 bytes 00:30:09.450400 usbus0.4 DONE-CTRL-EP=00000080,SPD=FULL,NFR=2,SLEN=4,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 2 bytes 0000 02 0A -- -- -- -- -- -- -- -- -- -- -- -- -- -- |.. | 00:30:09.451878 usbus0.4 SUBM-CTRL-EP=00000000,SPD=FULL,NFR=2,SLEN=12,IVAL=0 frame[0] WRITE 8 bytes 0000 21 09 03 03 00 00 03 00 -- -- -- -- -- -- -- -- |!....... | frame[1] WRITE 3 bytes 0000 03 02 00 -- -- -- -- -- -- -- -- -- -- -- -- -- |... | 00:30:09.454404 usbus0.4 DONE-CTRL-EP=00000000,SPD=FULL,NFR=2,SLEN=0,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] WRITE 3 bytes 00:30:09.466235 usbus0.4 SUBM-INTR-EP=00000082,SPD=FULL,NFR=1,SLEN=0,IVAL=10 frame[0] READ 14 bytes 00:30:09.523430 usbus0.4 DONE-INTR-EP=00000082,SPD=FULL,NFR=0,SLEN=0,IVAL=10,ERR=CANCELLED It is obvious that the communication fails very early. -- B.Walter <bernd_at_bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.Received on Thu Mar 08 2018 - 23:44:41 UTC
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