Bug 11466

Summary:	(evdev) assuption about Synaptics coordinates limits wrong.
Product:	Drivers	Reporter:	batchman
Component:	Input Devices	Assignee:	drivers_input-devices
Status:	RESOLVED INVALID
Severity:	low	CC:	dmitry.torokhov
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.26.3	Subsystem:
Regression:	No	Bisected commit-id:

Description batchman 2008-08-30 13:57:13 UTC

Distribution: Debian unstable
Hardware Environment: Dell inspiron 1520 laptop.
Synaptics touchpad detected as :

[   11.415975] Synaptics Touchpad, model: 1, fw: 6.3, id: 0x1a0b1, caps: 0xa04793/0x300000
[   11.415975] serio: Synaptics pass-through port at isa0060/serio1/input0
[   11.454365] input: SynPS/2 Synaptics TouchPad as /class/input/input5

Problem Description:

the current evdev synaptics driver reports limits dictated by the Synaptics Interfacing Guide (1472-5472,1408-4448), but on this hardware, limits are more like (1220-5900,900-5000).

This confuses the synaptics xorg driver and makes it consider larger scrolling area and less motion area.

Steps to reproduce: get a laptop like this, and use the touchpad and/or have a look at synclient -m 10

Workaround : use your touchpad differently or configure the driver to use different limits.

Comment 1 Dmitry Torokhov 2009-09-05 03:53:59 UTC

This kind of adjustment should be done via HAL with the help of DMI data to identify the box; not a kernel issue.