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authorAndrew Duggan <aduggan@synaptics.com>2017-10-09 20:51:05 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-10-09 20:52:39 -0700
commit2b30297d481ad305134252557768c22391e0fed6 (patch)
treea374c1d2c714904f0f62e019c371a21f62eaeee0 /drivers
parentInput: elan_i2c - extend Flash-Write delay (diff)
downloadlinux-dev-2b30297d481ad305134252557768c22391e0fed6.tar.xz
linux-dev-2b30297d481ad305134252557768c22391e0fed6.zip
Input: synaptics - disable kernel tracking on SMBus devices
In certain situations kernel tracking seems to be getting confused and incorrectly reporting the slot of a contact. On example is when the user does a three finger click or tap and then places two fingers on the touchpad in the same area. The kernel tracking code seems to continue to think that there are three contacts on the touchpad and incorrectly alternates the slot of one of the contacts. The result that is the input subsystem reports a stream of button press and release events as the reported slot changes. Kernel tracking was originally enabled to prevent cursor jumps, but it is unclear how much of an issue kernel jumps actually are. This patch simply disabled kernel tracking for now. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1482640 Signed-off-by: Andrew Duggan <aduggan@synaptics.com> Tested-by: Kamil Páral <kparal@redhat.com> Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/input/mouse/synaptics.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 5af0b7d200bc..ee5466a374bf 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -1709,8 +1709,7 @@ static int synaptics_create_intertouch(struct psmouse *psmouse,
.sensor_pdata = {
.sensor_type = rmi_sensor_touchpad,
.axis_align.flip_y = true,
- /* to prevent cursors jumps: */
- .kernel_tracking = true,
+ .kernel_tracking = false,
.topbuttonpad = topbuttonpad,
},
.f30_data = {