Ubuntu - usb interface claimed or not

[Henning Skoglund]

I'm struggelig getting connection of the usb interface in Ubuntu 13.10. The application has called the onClaimed callback, but inspecting the

tail -f /var/log/syslog

gives

ThinkPad-T60 kernel: [ 8781.137407] usb 2-2: usbfs: process 7832 (Chrome_FileThre) did not claim interface 0 before use

lsusb | grep Dynastream

Bus 002 Device 017: ID 0fcf:1008 Dynastream Innovations, Inc. Mini stick Suunto

lsusb -v | grep Dynastream gives

ThinkPad-T60:~$ lsusb -v | grep Dynastream

Couldn't open device, some information will be missing

(repeated 6 times)

Bus 002 Device 017: ID 0fcf:1008 Dynastream Innovations, Inc. Mini stick Suunto

  idVendor           0x0fcf Dynastream Innovations, Inc.

  iManufacturer           1 Dynastream Innovations

Couldn't open device, some information will be missing

console.log from web app:

1391254636885 "Interface number 0 claimed" "in"

Object {address: 1, direction: "in", maximumPacketSize: 64, pollingInterval: 1, type: "bulk"…}

1. address: 1
2. direction: "in"
3. maximumPacketSize: 64
4. pollingInterval: 1
5. type: "bulk"
6. usage: "data"
7. __proto__: Object

"out"

Object {address: 1, direction: "out", maximumPacketSize: 64, pollingInterval: 1, type: "bulk"…}

I've tried with usbmon and starting the app

sudo cat /sys/kernel/debug/usb/usbmon/2u >2u.mon.out

but the file is 0 bytes, so there is apparently nothing happening on bus 2

So I am in a situation where the interface seems to be claimed by the app, but really it not claimed libusbx/os. Anyone knows what might be the problem here, is there something about security (root vs normal user access to the device)?

[Henning Skoglund]

After inspecting the log with dmesg I found that the linux kernel module suunto was loaded by default and somehow had claimed the interface. I added 'blacklist suunto' to /etc/modprobe.d/blacklist.conf and rebooted.

I've also added a check in the onClaimed callback for chrome.runtime.lastError which in this case the message was 'error claiming interface'