[Interest] Slow pointer follow in Qt 5.2.2 (git) on freescale i.MX6 with tslib

Jacob Kroon jacob.kroon at gmail.com
Thu Mar 6 10:05:14 CET 2014


Hi Stefano,

On Thu, Mar 6, 2014 at 9:22 AM, Stefano Cordibella <
stefano.cordibella at edalab.it> wrote:

>  Hi Jacob,
>     right, I did not specify that I use eglfs.
>
>
I can just talk from my own personal experience in using Qt5+iMX6. In
5.1.1, eglfs had a hard time tracking the mouse pointer, 5.2.0 improved
things a lot. But best experience sofar has been in using the X11 backend
instead of eglfs.

Stefano.
>
>
> On 03/06/2014 08:53 AM, Jacob Kroon wrote:
>
>  Hi Stefano,
>
> On Thu, Mar 6, 2014 at 8:47 AM, Stefano Cordibella <
> stefano.cordibella at edalab.it> wrote:
>
>>  Hi list,
>>     using qt 5.2.2 (release branch from git, but I noticed the same issue
>> with 5.2.1) on I.MX6 it is impossible to flick on qml elements, because the
>> pointer does not "follow" the finger on touchscreen...
>>
>> The strange issue is that with non-qml application (fingerpaint example)
>> or using tslib test application (ts_test) on device the cursor follow the
>> finger at higher speed.
>> Is this a libqtslibplugin.so or a qml issue?
>> I generated the plugin without any option, only qmake, make and make
>> install...
>>
>> I am using tslib library because my touchscreen does not support evdev
>> (it is resistive?); I mean, trying to use EvdevTouch does not work at all,
>> using EvdevMouse I see the pointer moving on screen, but the click doesn't
>> work...
>>
>> Any suggestion will be appreciated...
>>
>>
> Which qpa backend are you using, xcb, wayland or eglfs ?
>
>
>
> --
> *Stefano Cordibella*
> EDALab s.r.l. - Networked Embedded Systems
>
> Strada Le Grazie, 15 - 37134 Verona - Italy
> email : stefano.cordibella at edalab.it
> skype : stefano.cordibella
> tel. : +39 045 802 70 85
> web : www.edalab.it
>



-- 
  -- Jacob
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