[Development] Multiple Windows Dead-Lock Observed on QNX with Qt-5.3.2

Thiago Macieira thiago.macieira at intel.com
Wed Jun 15 19:54:54 CEST 2016

On quarta-feira, 15 de junho de 2016 23:11:24 PDT Prashant Purohit wrote:
> Hi all,
> I am new to QT and using QT with QNX.
> I am using two different windows in my application (It is not possible
> for me to use single window).
> When I switch from one window to another window, My screen is not
> responding due to deadlock. Though there is no crash observed.
> My situation is similar to bug
> (https://bugreports.qt.io/browse/QTBUG-47553) which is already
> reported.
> By referencing above bug, when I set QSG_RENDER_LOOP=basic, the dead
> lock condition is prevented but then the animation which is being
> shown after every button press is not smooth anymore.
> Is there any better solution for above problem?
> If QSG_RENDER_LOOP=basic is the only solution then what I need to do
> to make the animation (sequencialAnimation on every button press)
> smooth as it was before setting the QSG_RENDER_LOOP environment
> variable?
> Also is there any alternative which I can use in my code other than
> setting QSG_RENDER_LOOP environment variable?

Hello Prashant

Please upgrade. 5.3.2 is a year and a half old. We've just released 5.6.1 and 
we're about to release 5.7.0. Please try those.

Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center

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