[Bug 480777] [NEW] Pressure sensitivity support insuficient

[coCoKNIght]

Public bug reported:

Binary package hint: xserver-xorg-input-aiptek

I've got a G-Pen 560 which identifies itself as Aiptek. It works in Jaunty with the Aiptek driver, with the Wacom driver and with the Wizardpen driver, but with the Aiptek driver pressure sensitivity doesn't work well, If I draw a line with pressure set to opacity and applying almost no pressure at the start of the line and gradually increase pressure until reaching full pressure and ending the line I should get a nice gradient from white to black (as is the case with the other drivers). Instead I get the same light gray all the way to the middle of the line where a very short gradient transitions to full black which stays the color for the second half of the line.
I've tested this with multiple applications that support pressure sensitivity and with different settings for the .fdi file (zMax to 1023 and to 511)

** Affects: xserver-xorg-input-aiptek (Ubuntu)
     Importance: Undecided
         Status: New

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Pressure sensitivity support insuficient
https://bugs.launchpad.net/bugs/480777
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