Ubuntu
xf86-input-wacom package

  1. Bug #532137
  2. Comment #16

Comment 16 for bug 532137

Revision history for this message
Tim Cole (tcole) wrote : Re: Wacom Intuos2 tablet works only when plugged in before booting

Chris Bagwell wrote:

I quickly looked at the Xorg.log files from launchpad below. Right after
hotplug of tablet, usbParse() goes in infinite loop and prints message about
invalid serial #. Not positive its infinite loop but at least the log stops
with no messages beyond repeating error message. If you wait long enough,
perhaps the tablet corrects itself?

Intuos1 and Intuos2 are unique in that they get serial # from hardware itself
and used by xf86-input.wacom. Serial # is a unique value that allows tracking
multiple tools at once.

You've found a case were tablet streams out packets in a way that serial # is
sent as zero. Either tablet is saying a zero value or else an if() statement
is getting confused and not allowing to init values correctly.

This is all on kernel side, BTW.

Since I do not own own of these tablets, I do not have much more to offer. I
can only say it appears mostly a kernel side bug from information so far