[Linuxwacom-discuss] Intuos4 and pointer jitter

[SHIRAKAWA A. <shi...@gm...>]

Hello everybody.

I hope somebody can help me solve this rather annoying problem I have 
with my Intuos4 Medium tablet and Ubuntu. Because of it I'm forced to 
use Windows.

On some areas on the corners of the tablet (screen) the pointer tends to 
  shake lightly but visibly even though the pen is perfectly still 
(pointer jitter). On the central area of the tablet the pointer appears 
instead to behave normally.

This happens under Gnome on Ubuntu 9.04 and 9.10 RC (latest version at 
the time I'm writing). I tried to change USB ports, switch PC, and also 
change my Intuos4 pen, but with no luck.
If I increase the Suppress value to higher values than default (30-40) 
this issue is somewhat mitigated, but at the cost of a sluggish cursor 
response, and when the pointer starts moving it still shakes a little 
anyway: it's not really a viable solution.
Setting Suppress to 0 makes the pointer shake lightly but annoyingly 
almost everywhere on the screen. Oddly enough, with my previous Bamboo 
Fun tablet I didn't have any problem at all. Xidump reveals that on some 
areas around the corners of the tablet X and Y coordinates vary randomly 
  and constantly back and forth by a maximum 25-30 units.

I tried to install the new 0.8.5 development linuxwacom drivers, but 
with no luck. This problem appears to be occurring only on Linux: on 
Windows (Vista and Seven) on the same PC with the official Wacom drivers 
my Intuos4 tablet works flawlessly, and the pointer is perfectly stable 
everywhere on the screen.

Does anybody else have this rather annoying problem under Linux with the 
Intuos4 tablet? I'm not really sure if this issue is due to a driver or 
a hardware problem. But again, the tablet works perfectly on Windows.

-- 
SHIRAKAWA Akira