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[Jason Gerecke <1548581@xxxxxxxxxxxxxxxxxx>]

I'm aware of two Wacom bugs that can cause 4.4 to lockup, both of which
have been recently fixed. It would be very good to know if you're
experiencing either. Please let us know what Wacom device you are using
that causes these lockups.

Issue [1] sounds most like the symptoms you describe and affects
multiple tablets (Primarily the newest "Intuos" tablets with model
numbers CTL-490, CTH-490, CTL-690, and CTH-690). A fix is included in
Linux 4.4.2 as well as the linuxwacom project's backported input-wacom
0.30.2 driver. Updating the kernel or installing the input-wacom driver
should narrow down if this is the problem. You might try SSHing into
your system prior to the lockup, running `sudo journalctl -f`, and then
bringing the pen into prox to trigger the lockup -- if you're lucky,
after a short time you'll see a kernel LOCKUP message printed out that
you can compare to the bug report.

Issue [2] I believe is specific to the CTL-471 and CTL-671. The fix has
been sent for inclusion in later 4.4 releases but has not yet (as far as
I'm aware) yet been accepted.

[1]: https://sourceforge.net/p/linuxwacom/bugs/293/
[2]: https://bugzilla.redhat.com/show_bug.cgi?id=1317116

** Bug watch added: Red Hat Bugzilla #1317116
   https://bugzilla.redhat.com/show_bug.cgi?id=1317116

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https://bugs.launchpad.net/bugs/1548581

Title:
  using wacom tablet crashes the whole system in 16.04

Status in linux-firmware package in Ubuntu:
  Confirmed

Bug description:
  Just tried the daily build and - as I expected, because I tried many
  times - if I try to use my Wacom tablet, the whole system freezes.

  I'm not sure what it is, maybe it gets a kernel panic or it's because
  X.org, but I can't even restart the session, just if I turn off my
  laptop by pressing the power button for seconds, because after trying
  to use the graphics tablet, even the mouse and keyboard are frozen. I
  reproduced this many times and I got the same results every single
  time. But this doesn't even need to be in a drawing software. If I
  move the pen over the tablet the whole system crashes.

  Of course, if I pull it out and after restart I use Ubuntu without it,
  then everything is normal, but in my opinion this is a heavily serious
  issue, considering that we are talking about an LTS release, which has
  to mean rock-solid stability over non-LTS distros. Now I'm in Linux
  Mint, because this happens since 15.10 and Mint is the only Linux
  distribution which has full support for my graphics and art project
  workflow. Whatever they do, it just works, but Ubuntu is seriously
  unstable these days.

  Here are my outputs:
  Linux CNB-NoteBook-Pro 4.4.0-11-generic #26-Ubuntu SMP Sat Mar 5 14:25:21 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

  Ubuntu 4.4.0-11.26-generic 4.4.4

  dmesg.log -> http://pastebin.com/WjLQpbvk
  lspci-vvnn.log -> http://pastebin.com/6aYymGAG

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