[Bug 133060] [NEW] Synaptic touchpad fails to register some of the taps for tap-to-click

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Bryce Harrington (bryce):

Binary package hint: xserver-xorg-input-synaptics

When using tap-to-click, the synaptics driver fails to register some
taps as clicks. I have managed to link this with abnormal coordinates
reported by the driver using "synclient -m 10". Whenever a tap is not
registered as a click, there is one or more consecutive reports of
touching at coordinates (x=1, y=5855), which might explain why it is not
registered as a click.

I have recorded a few taps and saved them as a .txt file, which you can
view at: http://ubuntuforums.org/showpost.php?p=3202355&postcount=5

by watching the output of "synclient -m 10" I have been able to find a
pattern, when taps are registered and when they're not. I have found
that every time a tap is not registered there is a weird "1" appearing
on the X column and a "5855" on the Y column, meaning that my touchpad
registered touch at the (1,5855) coordinates. This, coupled with the
MaxTapMove=220 (default), means that it will register a movement during
my tap and as such it will invalidate it as a tap.

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express Memory Controller Hub [8086:27a0] (rev 03)
     Subsystem: Dell Unknown device [1028:01bd]
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon Mobility X1400 [1002:7145] (prog-if 00 [VGA])
     Subsystem: Dell Unknown device [1028:2003]

** Affects: xserver-xorg-input-synaptics (Ubuntu)
     Importance: Low
         Status: Fix Committed

** Affects: xserver-xorg-input-synaptics (Debian)
     Importance: Unknown
         Status: New


** Tags: feisty karmic lucid patch
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Synaptic touchpad fails to register some of the taps for tap-to-click
https://bugs.launchpad.net/bugs/133060
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