[ltp] Wheel mouse doesn't work

Matt Graham linux-thinkpad@linux-thinkpad.org
Thu, 9 Jun 2005 15:56:26 -0400


On Thursday 09 June 2005 14:01, after a long battle with technology, 
James Knott wrote:
> I've been trying to get a wheel mouse to work in SuSE 9.3, on my R31
> ThinkPad.  However, even though it's configured exactly the same way,
> as on the desktop system, the scroll wheel does not work on the
> ThinkPad, while running Linux.  I've tried two different mice (both
> Logitech), but neither work, with Linux on the ThinkPad, but both
> work with XP on the ThinkPad as well as Linux on my desktop system.

Is this a PS/2 mouse?  On Thinkpads, the PS/2 port in the back shares 
data lines with the built-in Trackpoint.  Events from the device 
connected to the PS/2 port are reported on /dev/psaux .  The Trackpoint 
uses the PS/2 mouse protocol.  Most wheelmice use the IMPS/2 protocol.  
Using different protocols for the mouse on the PS/2 port and the 
Trackpoint is theoretically possible, but there are currently some 
problems with X that make it... difficult.  USB mice, OTOH, work fine.

You may want to check the archives of this mailing list and see if 
anyone's posted a solution in the past.  It's possible--not insanely 
likely, but possible.  It may be something as simple as adding 
"psmouse.proto=imps" to the kernel command line (assuming a 2.6 kernel 
with PS/2 mouse support built in) or "rmmod psmouse && modprobe psmouse 
proto=imps" if PS/2 mouse support is modular.  It may not be.  I don't 
know for sure; I've never used the PS/2 port on my Thinkpad.  HTH 
anyway,

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