Bug#622231: xserver-xorg-input-synaptics: synaptics driver not always used

[Jonathan Nieder <jrnieder@gmail.com>]

Vincent Lefevre wrote:
> On 2012-08-19 17:54:48 -0700, Jonathan Nieder wrote:

>> Therefore closing, but if it happens again, we'll be happy to
>> revisit it.
>
> The bug occurred twice with 3.5.5-1~experimental.1 (first boot
> was after two weeks my laptop was switched off, and another
> reboot immediately after). The third (re)boot was OK.

Hm, heisenbugs are no fun.  I'm guessing the simplest way forward
is to compare traces of the touchpad detection from the working
and non-working boots.

Please add "i8042.i8042_debug=1" to the kernel command line and
confirm that your kernel log is filled with noise.  IIRC the
interesting stuff happens during boot, so you can might want to quell
the noise afterward by running
"echo 0 >/sys/module/i8042/parameters/debug".

Hope that helps,
Jonathan