2009/12/28 Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>: > On Dec 27, 2009, at 8:43 AM, Erik Andrén <erik.andren@xxxxxxxxx> wrote: > >> 2009/12/27 Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>: >>> >>> On Fri, Dec 25, 2009 at 12:54:16PM +0100, Erik Andrén wrote: >>>> >>>> 2009/12/25 Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>: >>>>> >>>>> On Thu, Dec 24, 2009 at 11:54:27AM +0100, Erik Andrén wrote: >>>>>> >>>>>> 2009/12/23 Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>: >>>>>>> >>>>>>> On Wednesday 23 December 2009 03:13:04 am Erik Andrén wrote: >>>>>>>> >>>>>>>> Hi, >>>>>>>> I have a ASUS 1005HA netbook equipped with a Synaptics touch pad: >>>>>>>> [ 18.341491] Synaptics Touchpad, model: 1, fw: 7.2, id: 0x1a0b1, >>>>>>>> caps: 0xd04731/0xa40000 >>>>>>>> >>>>>>>> In Linux, no multitouch capabilities are detected (Zoom, two and >>>>>>>> three >>>>>>>> finger button presses etc.). >>>>>>>> This all works with the same hardware in windows 7. >>>>>>>> Is there a bug in the linux driver preventing multitouch to work? >>>>>>>> >>>>>>> >>>>>>> Linux Synaptics driver does not have full multitouch support (yet?). >>>>>>> The 2- >>>>>>> and 3- finger taps should work (provided that they are enabled in >>>>>>> SYnaptics X >>>>>>> driver) but there is no multiple finger tracking... >>>>>> >>>>>> They don't. I've tried with the 1.1.2 and 1.2.0 version of the xorg >>>>>> synaptics driver. But if this is the issue I guess I should take this >>>>>> inquiry to the proper xorg mailing list. >>>>> >>>>> Not yet, kernel needs to add support for this as well. >>>>> >>>>>> >>>>>>> >>>>>>> BTW, the capability 0xd04731 indicates that your hardware does not >>>>>>> report >>>>>>> multi-finger taps. >>>>>>> >>>>>> I'm aware of that, but why does pinch and zoom then work in windows 7? >>>>>> Is it possible to emulate this with a single touch touchpad? >>>>>> >>>>> >>>>> I think your touchpad is a fully multi-finger one, not just >>>>> multi-finger >>>>> tapping like older touchpads. Only multi-finger tapping is currently >>>>> supported by Synaptcs X driver. >>>>> >>>> Could you elaborate on what a multi-finger touchpad is? >>> >>> Multi-finger touchpad (or touchscreen) is a device that can recognize >>> several objects touching the surface of the device and report separate >>> sets of coordinates (and maybe more data) for every object. >>> >>>> The Synaptics PS/2 Touchpad Interface Guide, 3.2.6 states that two and >>>> three fingers are only detected when the capMultiFinger capability is >>>> detected which according to the driver isn't detected for this >>>> touchpad. >>>> >>> >>> Apparently this guide is a bit obsolete. >>> >> >> I've downloaded the document from the synaptics website and it has a >> 2009 copyright which means its fairly recent. > > As witnessed by the presence of ClickPads that are not documented there it > is not complete. > >> Are you sure there are any other documentation? If so, do you have any >> access to it? Or is this some kind of proprietary interface? > >> > No, I do not. > Ok, I've done some more research on the subject: Synaptics released their Synaptics Gesture Suite [1] at CES last year [2]. This software enables a number of different gestures on synaptics touchpads. Googling around it also seems like some older touchpad also supports this, but that the OEM chooses when to enable this or not in the windows driver. There are hacked windows driver which enables this functionality on machines where the driver shipped[3]. I've been unable to secure any documentation on how and at what hardware/software level the gesture support is implemented. It's very possible that much of the gesture recognition is done at a software level and that some kind of user-space library needs to be developed in order to gain full gesture support on linux. When comparing the capabilities bits of my ASUS EeePc 1005HA synaptics touchpad with the latest synaptics datasheet available on their website I noticed that Bit 5 of Byte 3 is marked as reserved (i.e may be used for further extensions) but is 1 on my machine. This might imply that there is another capability available for which Synaptics hasn't released any documentation support for. Best regards, Erik [1] http://www.synaptics.com/solutions/technology/gestures/touchpad [2] http://www.synaptics.com/about/press/press-releases/synaptics-exhibits-advanced-gestures-and-mobile-computing-technology-ces [3] http://forums.laptopvideo2go.com/topic/17890-synaptics-v10-2-4-modded-for-acer-gemstone-series/ > -- > Dmitry > > -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
