[Bug 624985] Re: xserver-xorg-input-synaptics grabs devices it shouldn't

[Launchpad Bug Tracker]

This bug was fixed in the package xserver-xorg-input-synaptics -
1.2.2-2ubuntu5

---------------
xserver-xorg-input-synaptics (1.2.2-2ubuntu5) maverick; urgency=low

  * 115_evdev_only.patch was added but never applied. (LP: #624985)
 -- Chase Douglas <chase.douglas at ubuntu.com>   Sat, 18 Sep 2010 15:19:21 +0200

** Changed in: xserver-xorg-input-synaptics (Ubuntu)
       Status: Confirmed => Fix Released

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xserver-xorg-input-synaptics grabs devices it shouldn't
https://bugs.launchpad.net/bugs/624985
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Status in uTouch: Invalid
Status in “xserver-xorg-input-synaptics” package in Ubuntu: Fix Released

Bug description:
Two touchpad devices A and B
X enumerates A before B
They both have a /dev/input/event* node and a /dev/input/mouse* node
I set up xorg.conf to use evdev for A
A gets handled by evdev
B's /dev/input/mouse* node gets probed by synaptics
it doesn't match /dev/input/event* in the synaptics probe function, so synaptics runs the eventcomm AutoDevProbe callback
the AutoDevProbe callback finds the first evdev node that isn't grabbed by synaptics already
in this case, it finds A and grabs it

Freeze Exception Information:

The solution is to match the synaptics input module only for /dev/input/event* nodes. For the purposes of Ubuntu, this bug may cause the Magic Trackpad to be grabbed by the synaptics driver instead of evdev. When this occurs, gestures will not work.