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

[Stefano Cordibella]

Thank you Jacob for your suggestion,
     for this application the choice of using eglfs is not under my 
direct control, in addition to this I suppose that the use of X11 can 
degrade the performance of the application (the target is a imx6 
Single...).

Did you noticed a decrease in performance moving from eglfs to X11?
Which imx6 did you used? Single Dual or Quad?

Stefano.

On 03/06/2014 10:05 AM, Jacob Kroon wrote:
> Hi Stefano,
>
> On Thu, Mar 6, 2014 at 9:22 AM, Stefano Cordibella 
> <stefano.cordibella at edalab.it <mailto: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
>>     <mailto: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
>     <mailto:stefano.cordibella at edalab.it>
>     skype : stefano.cordibella
>     tel. : +39 045 802 70 85 <tel:%2B39%20045%20802%2070%2085>
>     web : www.edalab.it <http://www.edalab.it>
>
>
>
>
> -- 
>   -- Jacob


-- 
*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
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