The cypress PS/2 trackpad models supported by the cypress_ps2 driver emulate BTN_RIGHT events in firmware based on the finger position, as part of this no motion events are sent when the finger is in the button area. The INPUT_PROP_BUTTONPAD property is there to indicate to userspace that BTN_RIGHT events should be emulated in userspace, which is not necessary in this case. When INPUT_PROP_BUTTONPAD is advertised userspace will wait for a motion event before propagating the button event higher up the stack, as it needs current abs x + y data for its BTN_RIGHT emulation. Since in the cypress_ps2 pads don't report motion events in the button area, this means that clicks in the button area end up being ignored, so INPUT_PROP_BUTTONPAD actually causes problems for these touchpads, and removing it fixes: https://bugs.freedesktop.org/show_bug.cgi?id=76341 Reported-by: Adam Williamson <awilliam@xxxxxxxxxx> Tested-by: Adam Williamson <awilliam@xxxxxxxxxx> Reviewed-by: Peter Hutterer <peter.hutterer@xxxxxxxxx> Cc: Adam Williamson <awilliam@xxxxxxxxxx> Cc: Peter Hutterer <peter.hutterer@xxxxxxxxx> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx --- drivers/input/mouse/cypress_ps2.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/input/mouse/cypress_ps2.c b/drivers/input/mouse/cypress_ps2.c index 87095e2..8af34ff 100644 --- a/drivers/input/mouse/cypress_ps2.c +++ b/drivers/input/mouse/cypress_ps2.c @@ -409,7 +409,6 @@ static int cypress_set_input_params(struct input_dev *input, __clear_bit(REL_X, input->relbit); __clear_bit(REL_Y, input->relbit); - __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); __set_bit(EV_KEY, input->evbit); __set_bit(BTN_LEFT, input->keybit); __set_bit(BTN_RIGHT, input->keybit); -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html