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[David Perkinson <580719@xxxxxxxxxxxxxxxxxx>]

This bug seems similar to one I am now encountering after upgrading from
10.04 to 10.10.  While using Xournal, the stylus will start to write
while the stylus is not touching the screen.  I am also getting the
behavior described above.  While using 10.04, I did not have this
problem.  The sylus would sometimes lock up, but I could fix this by
causing the laptop to sleep, then awaken.  That trick does not work for
me with 10.10.  I need to reboot X or reboot entirely.

I cannot reliably reproduce the behavior, but it happens often after I
use a projector (changing resolution), then having the laptop sleep.
Sometime after awakening again, I often (daily) get this behavior.

I am using a X200t., Linux 2.6.35-25-generic #44-Ubuntu SMP Fri Jan 21
17:40:44 UTC 2011 x86_64 GNU/Linux.  Xorg.0.log contains may line like
the following once the bahvior starts:

  5808.771] (WW) Serial Wacom Tablet touch: bad data at 2 v=a3 l=9
[  5808.800] (WW) Serial Wacom Tablet touch: bad data at 2 v=a3 l=9
[  5808.890] (WW) Serial Wacom Tablet touch: bad data at 3 v=a0 l=9
[  5808.930] (WW) Serial Wacom Tablet touch: bad data at 8 v=a0 l=9
[  5809.037] (WW) Serial Wacom Tablet touch: bad data at 7 v=a0 l=9
[  5809.151] (WW) Serial Wacom Tablet touch: bad data at 7 v=a3 l=9
[  5809.190] (WW) Serial Wacom Tablet touch: bad data at 7 v=91 l=9
[  5809.270] (WW) Serial Wacom Tablet touch: bad data at 2 v=a3 l=9
[  5809.329] (WW) Serial Wacom Tablet touch: bad data at 1 v=a3 l=9

I don't see anything unusual with dmesg.

xyzzy> xinput --list
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                   	id=10	[slave  pointer  (2)]
⎜   ↳ Serial Wacom Tablet stylus              	id=14	[slave  pointer  (2)]
⎜   ↳ Serial Wacom Tablet eraser              	id=12	[slave  pointer  (2)]
⎜   ↳ Serial Wacom Tablet touch               	id=13	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Video Bus                               	id=7	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=8	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=9	[slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                  	id=11	[slave  keyboard (3)]

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https://bugs.launchpad.net/bugs/580719

Title:
  Pen crazy in tablet PC, Lucid