[Qt-interest] QGLWidget & QGraphicsView not repainting on 2nd Monitor

[Josiah Bryan]

Josiah Bryan wrote:
> Brad Howes wrote:
>> On Sep 18, 2009, at 2:39 PM, Josiah Bryan wrote:
>>
>>> dxdiag reports both displays check out fine for both d3d and direct
>>> draw. So why would QGLWidget be having a problem with this if D3D
>>> handles it fine?
>> It is only having a problem under Windows, right, not Linux? Or have you 
>> not been able to test multiple-monitor support under Unix?
> 
> 
> Works *great* under linux - I've got four 24" screens, with a 
> QGraphicsView stretched across all four (that's eight feet of pixels, 
> man what a sight!).
> 
> Bottom line, multi-monitor & QGLWidget works fine under linux - just XP 
> that I'm having problems with.
> 
> -josiah

Can anyone at trolltech (or elsewhere) comment on this problem? This is 
indeed a problem. With OpenGL, I get ~25fps on windows. Without, I get 
~5fps. As this app is designed to be used for a theater setting, I 
definetly need a dual screen setup - one for control, one for output. 
Therefore, 5ps (no opengl) to get dual screen is not acceptable. I 
really need both opengl and dualscreen.

Any leads or ideas? Thanks!

-josiah