Wacom serial Tablet (TabletPC) stops working, but fine after suspend

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https://bbs.archlinux.org – Sometimes the pen stops working while I use it and keeps the current state (e.g. Clicked button hold down).I can still move the cursor with the Touchpad/Trackpoint but if the tablet stops while I'm holding down a button I can't release the "hold down" state.However it's fine again after suspending and resuming the TabletPC (HP 2730p)I've already figured out that "cat /dev/ttyS0" has no output if the tablet isn't working, but there is a lot of characters appear when I move the pen while the tablet is working.Another problem is that the Cursor sometim (HowTos)