Messages in this thread | | | Subject | Re: 答复: 答复: 答复: [PATCH] input: alps-fix the issue the special alps trackpoint do not work. | From | Hui Wang <> | Date | Fri, 24 May 2019 13:25:52 +0800 |
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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?
Many thanks in advance.
Hui.
> > 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? >
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