Public bug reported:
I believe this to be a kernel bug, but I'm not 100% sure. I presume it
applies to all flavours of the kernel, and not just to rt. According to
ThinkWiki this should have been fixed with 2.6.31
(http://www.thinkwiki.org/wiki/UltraNav#Linux_Support), but this does
not appear to be the case.
For some time I have had the touchpad disabled in BIOS on my Thinkpad
R61i with its ALPS dual pointing device. All functions of the trackpoint
then worked properly, including middle button scrolling and tap-to-
select (although I had to put a line in /etc/rc.local to enable this
directly through the relevant file in /sys). Subsequently I did a clean
install of Karmic. That is to say, all the settings to do with the
trackpoint have been configured automatically by the installer while the
touchpad was disabled.
Today I decided to re-enable the touchpad in bios. Suddenly the middle
button scrolling and tap-to-select stopped working. All functions of the
touchpad (except the ones I don't yet know how to test, such as palm
detection), including scrolling, tap-to-select and circular scrolling,
can be configured through synclient and other tools, and work fine. It
is just those trackpoint functions that are not working.
I have noticed that the device named in /etc/hal/fdi/policy as the
middle button scrolling device, "TPPS/2 IBM TrackPoint", is now no
longer listed by xinput list --short. What I find instead is
"AlpsPS/2 ALPS DualPoint TouchPad" id=2 [XExtensionPointer]
"DualPoint Stick" id=3 [XExtensionPointer]
which
However when I replace
<match key="info.product" string="TPPS/2 IBM TrackPoint">
with
<match key="info.product" string="DualPoint Stick">
it makes no difference.
I have also noticed that the file tap_to_select, which was present in
/sys when I had the touchpad disabled, is no longer there.
What ought to happen is that the full functionality of the trackpoint
and touchpad should supported by the kernel and simultaneously
available, and they should be easily configurable from a GUI
application.
ProblemType: Bug
Architecture: amd64
Date: Tue Jan 26 01:17:30 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
Package: linux-image-rt 2.6.31.9.10
ProcEnviron:
LANGUAGE=
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-9.152-rt
SourcePackage: linux-meta-rt
Uname: Linux 2.6.31-9-rt x86_64
** Affects: linux-meta-rt (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug
--
Trackpoint of ALPS dual stick/pad device only partially functional
https://bugs.launchpad.net/bugs/512603
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