Every time after a kernel update received from repo, the bamboo pen stops working. This is because the .ko file is copied to kernel specific directory(ex: /lib/modules/2.6.32-24-generic/kernel/drivers/input/tablet/), and for new kernel I have to copy this to new location. I used to fix the issue by recompiling wacom.
Copying the steps from this site.
Download the latest linuxwacom driver
wget http://prdownloads.sourceforge.net/linuxwacom/linuxwacom-0.8.6.tar.bz2
Now unpack, configure compile and install it:
tar -xf linuxwacom-0.8.6.tar.bz2
cd linuxwacom-0.8.6
./configure --enable-wacom
cd src/2.6.30/
make
sudo cp wacom.ko /lib/modules/`uname -r`/kernel/drivers/input/tablet/
sudo rmmod wacom
sudo modprobe wacom
