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[Arthur Shipkowski <ashipkowski@xxxxxxxxx>]

This bug is still alive in Trusty, apparently only on 3.16 kernels
(colleagues who are running 3.13 kernels do not have this issue):

$ cat /etc/issue
Ubuntu 14.04.2 LTS \n \l

$ uname -a
Linux Depths 3.16.0-41-generic #57~14.04.1-Ubuntu SMP Thu Jun 18 18:01:13 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ grep CONFIG_USB_OTG /boot/config-3.16.0-41-generic 
CONFIG_USB_OTG=y
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
CONFIG_USB_OTG_FSM=m

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https://bugs.launchpad.net/bugs/1411295

Title:
  CONFIG_USB_OTG has gotten set again, kernel will not talk to OTG
  devices

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Utopic:
  Fix Committed
Status in linux source package in Vivid:
  Fix Released

Bug description:
  I have a few devices that have USB OTG ports.  The kernel in Ubuntu
  14.10 and later no longer recognizes these devices because
  CONFIG_USB_OTG forces the kernel to enter host nego protocol (which is
  not generally supported on the other end) and ends up rejecting the
  device.  The devices work with Ubuntu 14.04 LTS.

  This  CONFIG_USB_OTG config option was disabled by the fix for
  #1047527 but has since been reenabled for whatever reason, rendering
  desktop Ubuntu useless as a development host for these devices.

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