On Wed, 8 Oct 2025, Benjamin Tissoires wrote: > According to Peter, we've had for a very long time an issue on some > mutltiouch touchpads where the fingers were stuck in a scrolling mode, > or 3 fingers gesture mode. I was unable to debug it because it was > rather hard to reproduce. > > Recently, some people raised the issue again on libinput, and this time > added a recording of the actual bug. > > It turns out that the sticky finger quirk that was introduced back in > 2017 was only checking the last report, and that those missing releases > also happen when moving from 3 to 1 finger (only 1 is released instead > of 2). > > This solution seems to me to be the most sensible, because we could also > add the NSMU quirk to win8 multitouch touchpads, but this would involve > a lot more computations at each report for rather annoying corner cases. > > Link: https://gitlab.freedesktop.org/libinput/libinput/-/issues/1194 > Signed-off-by: Benjamin Tissoires <[email protected]> > --- > Benjamin Tissoires (2): > HID: multitouch: fix sticky fingers > selftests/hid: add tests for missing release on the Dell Synaptics > > drivers/hid/hid-multitouch.c | 27 ++++++----- > .../testing/selftests/hid/tests/test_multitouch.py | 55 > ++++++++++++++++++++++ > 2 files changed, 69 insertions(+), 13 deletions(-)
Now queued in for-6.18/upstream-fixes. Thanks, -- Jiri Kosina SUSE Labs
