Comment # 18 on bug 1013647 from Martin Wilck

This recent mail from the Research ML is worthwhile:

"More and more people here have the Dell E7470 with the ALPS DualStick
Trackpoint. Unfortunatly, it is so sensitive on a normal Linux system,
that it is unuseable.

But: if I boot the installer, the Stick works perfect! So I tried to
find out what the differnce is: in the normal system, the Stick is
detected correct as ALPS DualStick, while in the installer, it is only
detected as ImPS mouse. I wasn't able to find out why this is the
case."

And later:

> Please try:
> 
>   psmouse.proto=imps
> 
> On your kernel cmdline.

Thanks, that works!

The stick works with the imps protocol but not with alps/2. Perhaps we could
approach upstream again with this information.