Comment # 10 on bug 1229056 from Bernd Speiser

(In reply to Takashi Iwai from comment #9)
> OK, thanks.
> 
> There are quirk entries for a few Fujitsu models, and we can try them out.
> e.g. pass the boot options "i8042.nomux=1 i8042.notimeout=1 i8042.noaux=1"
> Either all or try one by one.

I tried all of the three and all of the combinations. Here are the results (
abbreviate the options in an obvious way):

nomux+notimeout+noaux: touchpad unresponsive already after start-up

nomux+notimeout: touchpad OK after start-up and after suspend/resume

nomux+noaux: touchpad unresponsive already after start-up

notimeout+noaux: touchpad unresponsive already after start-up

nomux: touchpad OK after start-up and after suspend/resume

notimeout: touchpad OK after start-up, but unresponsive after suspend/resume

noaux: touchpad unresponsive already after start-up

My conclusion is that nomux=1 is solving my problem, notimeout=1 is "neutral",
but noaux=1 is breaking the touchpad altogether.