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
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