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[Luis Henriques <luis.henriques@xxxxxxxxxxxxx>]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
trusty' to 'verification-done-trusty'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-trusty verification-needed-utopic

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https://bugs.launchpad.net/bugs/1310800

Title:
  056a:0302 Trusty Tahr, kernel 3.13: automatic load of wacom.ko driver
  cause a "hard" kernel panic

Status in linux package in Ubuntu:
  Confirmed
Status in linux-lts-utopic package in Ubuntu:
  Invalid
Status in linux source package in Trusty:
  Fix Committed
Status in linux-lts-utopic source package in Trusty:
  Fix Committed

Bug description:
  I have just upgraded to 14.04 from 13.10.

  I have a wacom cth-480  touch+pen tablet, which was not recognized on
  13.10 (kernel 3.11). With the stock kernel from 14.04, I have an
  immediate kernel panic as soon as I plug in the tablet to the laptop.

  The system is a asus 1005PE (32 bit install), Xubuntu, up-to date:
  Linux asus-romano 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:08:14
  UTC 2014 i686 i686 i686 GNU/Linux

  The really strange thing is that if I manually load the driver with
  `sudo modprobe wacom` *before* pluggin the tablet in, then the tablet
  is recognized and works ok:

  SYS: Apr 21 15:15:47 asus-romano kernel: [  265.664161] usbcore: registered new interface driver wacom
  SYS: Apr 21 15:15:52 asus-romano kernel: [  270.088161] usb 2-1: new full-speed USB device number 2 using uhci_hcd
  SYS: Apr 21 15:15:52 asus-romano kernel: [  270.253626] usb 2-1: New USB device found, idVendor=056a, idProduct=0302
  SYS: Apr 21 15:15:52 asus-romano kernel: [  270.253641] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
  SYS: Apr 21 15:15:52 asus-romano kernel: [  270.253651] usb 2-1: Product: Intuos PTS
  SYS: Apr 21 15:15:52 asus-romano kernel: [  270.253659] usb 2-1: Manufacturer: Wacom Co.,Ltd.
  SYS: Apr 21 15:15:52 asus-romano kernel: [  270.257027] input: Wacom Intuos PT S Pen as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/input/input14
  SYS: Apr 21 15:15:52 asus-romano kernel: [  270.260630] input: Wacom Intuos PT S Finger as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.1/input/input15
  SYS: Apr 21 15:15:52 asus-romano mtp-probe: checking bus 2, device 2: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1"
  SYS: Apr 21 15:15:52 asus-romano mtp-probe: bus: 2, device: 2 was not an MTP device

  A screenshot of the kernel panic is added. I can reproduce it at will.

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