[Qt-creator] Cannot display QML inside creator, works just fine outside it

Harri Pasanen harri at mpaja.com
Fri Feb 12 10:25:09 CET 2016

It would be nice to know what graphics drivers were are talking about.  Intel, Nvidia and AMD being the likely culprits.

On a related side-track, I’ve recently tried to hunt down why the Android emulator does not work on my laptop with Linux.   There it appears that the Intel OpenGL is at fault as configuring a virtual machine without host GPU makes the emulator work, and it also works on a desktop with Nvidia.


> On 12 Feb 2016, at 10:39, Hunger Tobias <Tobias.Hunger at theqtcompany.com> wrote:
> On Do, 2016-02-11 at 23:13 +0200, Nikos Chantziaras wrote:
>> When I run an application that displays a QQuickWidget outside of 
>> Creator, everything is fine. However, when running it in Creator (with 
>> or without debugger), the application freezes at the moment the 
>> QQuickWidget is used, and I get this error in "Application Output":
>>    Unrecognized OpenGL version
>>    Unrecognized OpenGL version
>> What is wrong here?
>> I'm on Linux 64-bit, with Qt Creator 3.6.0.
> Hello Nikos,
> I had a similar problem before: Apparently some Linux graphics drivers lock up
> when two applications try to use GL at the same time:-/
> Your QML-using application is one program, and Qt Creator requires GL for the
> QMLProfiler/QMLDesigner and the Welcome plugin. The first two are only loaded on
> demand, but the Welcome page is shown directly. To prevent that, you can try to
> start Qt Creator with "-noload Welcome" options.
> If your application starts then without freezing Qt Creator, then you can try to
> experiment with your graphics drivers.
> You should get the same freezes by starting any two openGL applications at the
> same time (e.g. two instances of GLXgears).
> Best Regards,
> Tobias
> -- 
> Tobias Hunger, Senior Software Engineer | The Qt Company
> The Qt Company GmbH, Rudower Chaussee 13, D-12489 Berlin
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