Mask pen switch events

When the pen comes in proximity, special packets appear on the
multitouch device. This confuses userland which misinterprets the
touch state. This patch masks the special pen packets consisting
of a single finger of width 10, thereby fixing the problem.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 4 insertions, 0 deletions

diff --git a/usr/src/dkms_source_tree/hid-ntrig.c b/usr/src/dkms_source_tree/hid-ntrig.c
index 462a9a7..2d6cbc1 100644
--- a/usr/src/dkms_source_tree/hid-ntrig.c
+++ b/usr/src/dkms_source_tree/hid-ntrig.c
@@ -373,6 +373,10 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
                         if (nd->hasmt) {
                                 nd->nindex = 0;
                                 nd->ncol = value;
+                                /* skip pen switch events */
+                                if (nd->ncol == 1 &&
+                                    nd->col[0].w == 10 && nd->col[0].h == 10)
+                                        break;
                                 report_frame(input, nd);
                         }
                         break;