On Sep 28 2017 or thereabouts, Andrew Duggan wrote: > 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@xxxxxxxxxxxxx> > Tested-by: Kamil Páral <kparal@xxxxxxxxxx> Acked-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx> Thanks Andrew for the patch! Cheers, Benjamin > --- > drivers/input/mouse/synaptics.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c > index 5af0b7d..ee5466a 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 = { > -- > 2.7.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
