Ubuntu
wacom-tools package

  1. Bug #259659
  2. Comment #9

Comment 9 for bug 259659

Revision history for this message
claus (claus2) wrote :

Hi,

I have a similar/same issue here:
I use a thinkpad x60t. I will attach the output of "lspci -vvnn" but I'm not sure if it contains interesting information.

Usually the tablet does not work at all. Moving the pen over the display shows no effect. Only for two seconds after restarting X the pen works.

/var/log/Xorg.0.log shows tons of these lines:

xf86WcmSerialValidate: bad magic at 1 v=d0 l=5
xf86WcmSerialValidate: bad magic at 3 v=f0 l=5
xf86WcmSerialValidate: bad magic at 3 v=d0 l=5
xf86WcmSerialValidate: bad magic at 3 v=f0 l=5
xf86WcmSerialValidate: bad magic at 1 v=d0 l=5
xf86WcmSerialValidate: bad magic at 2 v=82 l=5
xf86WcmSerialValidate: bad magic at 1 v=8c l=9
xf86WcmSerialValidate: bad magic at 3 v=d0 l=9
xf86WcmSerialValidate: bad magic at 3 v=f0 l=5
xf86WcmSerialValidate: bad magic at 1 v=d0 l=5
xf86WcmSerialValidate: bad magic at 3 v=f0 l=5
xf86WcmSerialValidate: bad magic at 3 v=d0 l=5

If I do a "tail -f" I see these lines scroll by with approx. 3-5 new lines per sec.
If I put the pen close to the display surface the messages come in a lot faster.

If I run
 wacdump -f tpc /dev/input/wacom
and stop it again.
often the tablet suddenly works and stays usable (I have not done any long time testing). The error messages still appear in the log, but now there are only approx 1 new line per second.