On Tue, Aug 18, 2020 at 03:13:45PM +0200, Paul Menzel wrote: > Dear Peter, > > > Am 17.07.20 um 01:22 schrieb Peter Hutterer: > > On Thu, Jul 16, 2020 at 03:19:32PM +0200, Paul Menzel wrote: > > > > On the Dell Latitude E7250 and Dell Precision 3340 I fail to get three > > > finger pinch events generated needed for GNOME Shell gestures [1]. > > > > > > Debian Sid/unstable with Linux 5.7.6 is running on these systems. > > > > > > [ 1.602394] input: AlpsPS/2 ALPS GlidePoint as > > > /devices/platform/i8042/serio1/input/input2 > > > > > > I am only able to create swipe events. (Four finger swipe works to switch > > > workspaces.) > > > > > > ``` > > > $ sudo libinput debug-events > > > […] > > > -event1 DEVICE_ADDED AlpsPS/2 ALPS GlidePoint seat0 default > > > group10 cap:pg size 98x51mm tap(dl off) left scroll-nat scroll-2fg-edge > > > dwt-on > > > -event2 DEVICE_ADDED DELL Wireless hotkeys seat0 default > > > group11 cap:k > > > event1 - AlpsPS/2 ALPS GlidePoint: kernel bug: Wrong slot count (4), > > > reducing to 2 > > > -event1 GESTURE_SWIPE_BEGIN +1.549s 3 > > > event1 GESTURE_SWIPE_UPDATE +1.549s 3 -0.36/ 0.26 (-2.59/ 1.85 > > > unaccelerated) > > > […] > > > ``` > > > > > > Does the hardware and driver support that? > > > > The device is an Alps GlidePoint which are usually INPUT_PROP_SEMI_MT. On > > those devices, we don't support 3fg pinch gestures because we don't get > > enough data to make the gestures reliable. There is no specific quirk for > > your device otherwise, afaict. > > Thank you for your reply, and the explanation. > > Four finger gestures seem to work. At least in GNOME Shell workspaces can be > switched with that. > > > If it's not semi-mt then it's too hard to say without more data, I'll need > > at least the output from libinput record to figure out why (that recording > > will contain the libinput version which also matters). > > Sorry for omitting that. It’s 1.16.1 now. I uploaded the logs [2]. thanks. based on the log, it's not a semi-mt touchpad and has 5 slots. So gestures should work in theory, let's move this to a libinput bug please and continue there: https://gitlab.freedesktop.org/libinput/libinput/issues Cheers, Peter
