On Fri, May 24, 2019 at 01:25:52PM +0800, Hui Wang wrote: > > On 2019/5/23 下午2:01, Peter Hutterer wrote: > > On Wed, May 22, 2019 at 09:40:30AM +0200, Pali Rohár wrote: > > > On Wednesday 22 May 2019 07:30:43 Xiaoxiao Liu wrote: > > > > Hi Pali, > > > > > > > > Ok, and cannot you set ALPS_DUALPOINT flag based on that > > > > alps_check_is_trackpoint() result and then update > > > > alps_process_packet_ss4_v3() code to supports also > > > > V8 trackpoint packets? > > > > --> Yes, we can do like so, when we use the v8 method to process the trackpoint , the mouse speed is not ideal. > > > > Then we choose the standard mouse driver. > > > Mouse speed is something which is configurable. Have you configured it > > > somehow? Also there is libinput project should handle these settings > > > more properly. > > > > > > Adding Peter Hutterer, maintainer of libinput to loop. I think he could > > > help with this problem. > > libinput has a quirk for a magic multiplier on trackpoints. it was the only > > solution I found that came close to "working" given that every device seems > > to provide some other random magic data. Doc for it is here: > > https://wayland.freedesktop.org/libinput/doc/latest/trackpoint-configuration.html > > Hello Peter Hutterer, > > To adjust the trackpoint speed from userspace: > > If the libinput version is lower than 1.9.0, we could set > POINTINGSTICK_CONST_ACCEL=0.25 > > If the libinput version is higher than 1.12.0, we could set > AttrTrackpointMultiplier=0.25 > > But if we use libinput-1.10.0, how could we adjust the speed? The LIBINPUT_ATTR_TRACKPOINT_RANGE property, which didn't end up working well (hence why it got replaced again). See the docs here though: https://wayland.freedesktop.org/libinput/doc/1.10.0/trackpoints.html Cheers, Peter > > > > There are also different speeds depending on which xorg driver you'd use (or > > libinput/Wayland), so a "mouse speed is not ideal" is almost a guarantee, > > given a large enough variety of setups :) That's why we have the speed > > toggle, but I'm happy to hear any suggestions on how to make the trackpoint > > more useful (in libinput anyway). > > > > > I do not think it is a good idea to force back to generic PS/2 mouse > > > driver for touchpads and trackpoints. Native drivers for touchpads and > > > trackpoints supports multitouch, absolute reporting and lot of other > > > things... Also calculation of mouse speed from absolute positions on > > > touchpads can be more easily fixed as from emulated relative movements. > > Yeah, agree. Using PS/2 mouse drivers means you lose *all* the extra > > features touchpads have like palm detection, tapping, scrolling, gestures, > > etc. > > > > Cheers, > > Peter > > > > > Dmitry, what is your opinion about this problem? What should psmouse.ko > > > do in this situation? Disallow usage of absolute mode and force bare > > > PS/2 relative mode? > >
