From 2f5231cc88fccf389a78270d827f6c9201b86794 Mon Sep 17 00:00:00 2001 From: Peter Hutterer Date: Wed, 18 May 2016 07:35:36 +1000 Subject: [PATCH] touchpad: only use negative pressure change check on Lenovo *50 and *60 series This was introduced for bug 94379 - an X1 Carbon 3rd. Other touchpads have different pressure change ranges, causing this condition to trigger randomly and resulting in a jerky pointer motion. For now, reduce the check to the *50 and *60 series touchpads until we have data for more touchpads that we can add one-by-one. https://bugs.freedesktop.org/show_bug.cgi?id=95393 Signed-off-by: Peter Hutterer Reviewed-by: Hans de Goede --- src/evdev-mt-touchpad.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c index 4c8c3a3a..c8540439 100644 --- a/src/evdev-mt-touchpad.c +++ b/src/evdev-mt-touchpad.c @@ -928,6 +928,7 @@ tp_detect_jumps(const struct tp_dispatch *tp, struct tp_touch *t) static void tp_process_state(struct tp_dispatch *tp, uint64_t time) { + struct evdev_device *device = tp->device; struct tp_touch *t; unsigned int i; bool restart_filter = false; @@ -953,7 +954,8 @@ tp_process_state(struct tp_dispatch *tp, uint64_t time) if (!t->dirty) continue; - if (t->pressure_delta < -7) + if ((device->model_flags & EVDEV_MODEL_LENOVO_T450_TOUCHPAD) && + t->pressure_delta < -7) tp_motion_history_reset(t); if (tp_detect_jumps(tp, t)) {