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[Launchpad Bug Tracker <1395243@xxxxxxxxxxxxxxxxxx>]

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This a request to get a quirk added upstream for the Synaptics ClickPad
(buttonless trackpad) of the Lenovo Edge E440 to the synaptics kernel
driver so the right coordinates for the surface corners are reported and
the pointer functionality is correct.

$ lsb_release -rd
Description:	Ubuntu 14.04.1 LTS
Release:	14.04

$ apt-cache policy xserver-xorg-input-synaptics
xserver-xorg-input-synaptics:
  Installed: 1.8.1-1ubuntu2~trusty1
  Candidate: 1.8.1-1ubuntu2~trusty1
  Version table:
 *** 1.8.1-1ubuntu2~trusty1 0
        500 http://ppa.launchpad.net/aglasgall/synaptics/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status
     1.7.4-0ubuntu1 0
        500 http://ar.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

Yes, I'm using a newer version from ppa:aglasgall/synaptics
(https://launchpad.net/~aglasgall/+archive/ubuntu/synaptics) but this is
irrelevant to the issue as it hasn't been solved upstream yet.

$ cat /sys/class/dmi/id/product_version
ThinkPad Edge E440

$ cat /sys/devices/pnp0/*/id
PNP0c01
PNP0c02
PNP0103
PNP0200
PNP0800
PNP0c04
PNP0b00
LEN0071
PNP0303
LEN2006
PNP0f13
SMO1200
PNP0c31

$ dmesg | grep -i synaptics
[    3.757743] psmouse serio1: synaptics: Touchpad model: 1, fw: 8.1, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x127c00, board id: 2691, fw id: 1494646
[    3.757746] psmouse serio1: synaptics: serio: Synaptics pass-through port at isa0060/serio1/input0
[    3.804025] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input4

$ sudo ./touchpad-edge-detector /dev/input/event3
Touchpad SynPS/2 Synaptics TouchPad on /dev/input/event3
Move one finger around the touchpad to detect the actual edges
Kernel says:  x [1472..5044], y [1408..3398]
Touchpad sends:       x [1024..5045], y [2457..4832] /^C

I will be attaching a patch tomorrow.

Similar changes have been requested for other Thinkpad models also
shipping these new ClikcPads, via other distributions' bug trackers,
forwarded upstream, and succesfully incorporated in mainstream kernel
code. See e.g.

https://bugzilla.redhat.com/show_bug.cgi?id=1114768 and
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/input/mouse/synaptics.c?id=e76aed9da7189eeb41b9856552ce5721181e8e8d

https://bugzilla.opensuse.org/show_bug.cgi?id=903748 and
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/input/mouse/synaptics.c?id=e4742b1e786ca386e88e6cfb2801e14e15e365cd

https://bugzilla.redhat.com/show_bug.cgi?id=1096436 and
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/input/mouse/synaptics.c?id=0b5fe736fe923f1f5e05413878d5990e92ffbdf5

Thanks.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: e440 lenovo synaptics thinkpad trackpad
-- 
Please add min/max quirk for pnp-id LEN2006 (Lenovo Thinkpad Edge E440)
https://bugs.launchpad.net/bugs/1395243
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