On Sun, 23 Mar 2014, Mike Mitchell wrote: > Then last night I caught it in the act disconnecting again: > Here is a trap of the DISCONNECT event > > cat /sys/kernel/debug/usb/usbmon/0u > > f644c0c0 1122085228 C Ii:2:002:1 0:2048 2 = 0200 > f644c0c0 1122085266 S Ii:2:002:1 -115:2048 2 < > ee4c60c0 1122085347 S Ci:2:002:0 s a3 00 0000 0001 0004 4 < > ee4c60c0 1122085503 C Ci:2:002:0 0 4 = 00010100 > ee4c60c0 1122085614 S Co:2:002:0 s 23 01 0010 0001 0000 0 > ee4c60c0 1122085786 C Co:2:002:0 0 0 > ee7fb6c0 1122088626 C Ii:2:004:3 -108:32 0 > f6adec00 1122171337 S Ci:2:002:0 s a3 00 0000 0001 0004 4 < > f6adec00 1122171502 C Ci:2:002:0 0 4 = 00010000 > f6ade180 1122202854 S Ci:2:002:0 s a3 00 0000 0001 0004 4 < > f6ade180 1122203042 C Ci:2:002:0 0 4 = 00010000 > f3aa3000 1122234851 S Ci:2:002:0 s a3 00 0000 0001 0004 4 < > f3aa3000 1122235015 C Ci:2:002:0 0 4 = 00010000 > f3aa3000 1122266867 S Ci:2:002:0 s a3 00 0000 0001 0004 4 < > f3aa3000 1122267012 C Ci:2:002:0 0 4 = 00010000 > f3aa3c00 1122298811 S Ci:2:002:0 s a3 00 0000 0001 0004 4 < > f3aa3c00 1122298878 C Ci:2:002:0 0 4 = 00010000 > f644c0c0 1122301128 C Ii:2:002:1 -2:2048 0 > f3aa3c00 1122301238 S Co:2:002:0 s 00 03 0001 0000 0000 0 > f3aa3c00 1122301408 C Co:2:002:0 0 0 > > Corresponding KERN.LOG > Mar 22 22:58:36 enc006 kernel: [46114.215541] usb 2-1.1: USB > disconnect, device number 3 > Mar 22 22:58:36 enc006 kernel: [46114.462978] usb 2-1.1: new > full-speed USB device number 4 using ehci-pci > Mar 22 22:58:36 enc006 kernel: [46114.555712] usb 2-1.1: New USB > device found, idVendor=0d8c, idProduct=0008 > Mar 22 22:58:36 enc006 kernel: [46114.555720] usb 2-1.1: New USB > device strings: Mfr=0, Product=1, SerialNumber=0 > Mar 22 22:58:36 enc006 kernel: [46114.555725] usb 2-1.1: Product: > C-Media USB Audio Device > Mar 22 22:58:36 enc006 kernel: [46114.571464] input: C-Media USB Audio > Device as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.3/input/input6 > Mar 22 22:58:36 enc006 kernel: [46114.572360] hid-generic > 0003:0D8C:0008.0002: input,hidraw0: USB HID v1.00 Device [C-Media USB > Audio Device ] on usb-0000:00:1d.0-1.1/input3 The usbmon trace above appears to start here. > Mar 23 00:59:30 enc006 kernel: [53367.032726] usb 2-1.1: USB > disconnect, device number 4 That is definitely a hardware disconnect. It's not caused by software, unless the mouse interprets data sent to it by some program as a request to disconnect itself. (But of course, that could not explain the initial 45-minute delay.) It could easily be caused by something like an intermittently bad USB cable connection. Have you tried using this mouse with a different computer? Alan Stern -- 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
