I have the same issue on a Fujitsu-Siemens Amilo Si-1520, which is the
same motherboard as V3205.  Running Ubuntu Natty, touchpad doesn't
respond after resume.

I can confirm that adding atkbd.reset=1 to the boot kernel command line fixes 
it for me too.
I'm using a kernel.org vanilla kernel, 2.6.39-rc7-00211-gc1d10d1.
(I was quite surprised that I couldn't find anywhere else to set the flag other 
than the boot command line, so I had to reboot to find out.  Is this not one of 
the purposes of sysfs?)

It is reported elsewhere that downgrading the BIOS version to 1.10 also
fixes the problem of touchpad unavailable after resume, however that
isn't an option if using certain newer CPUs on these laptops, the
manufacturer claims that Vista requires a later BIOS, and (worst of all)
searching for the BIOS upgrade on the manufacturer's support site
reveals a program that only runs on Windows Vista.

I did not have this problem for several years, but a couple of days ago
I replaced the motherboard due to a broken power connector, and then I
noticed touchpad not working after resume.  It seems very likely this is
because the replacement had a newer BIOS.

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https://bugs.launchpad.net/bugs/810327

Title:
  Synaptics touchpad ceases functioning after suspend and resume

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