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Latest graphics drivers crash with QtOpenGL QGLWidget

GraphicsDriverTester
1,800 Views

Hi,

We have a Qt application that uses QGLWidget. With most of the new Intel graphics drivers(for eg. 27.20.100.8336 ), we observe that OpenGL calls from this widget gives a floating point exception. This was not the case before, everything was working fine. 

I have a Intel HD graphics 620 Card.  Can someone please help me with this.

3 Replies
n_scott_pearson
Super User
1,790 Views

By "most of the new", which specifically are you referring to? Please try to identify which build introduced the issue.

...S

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GabrieleGiuseppini
1,723 Views

I get the same with 27.20.100.8280 on the 630. It happens in an OpenGL application after a glViewport call that resizes the view, as soon as glClear or any rendering primitive is invoked (e.g. glDrawArrays):

Unhandled exception at 0x00007FFFD5E834CF (igc64.dll) in FloatingSandbox.exe: 0xC0000090: Floating-point invalid operation (parameters: 0x0000000000000000, 0x0000000000009861). 

This happens in my debug builds, when I enable on purpose all floating point exceptions except for INEXACT and UNDERFLOW. Is the driver supposed to generate floating point exceptions?

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GabrieleGiuseppini
1,707 Views

For those interested ones, I've just installed 27.20.100.8587 and the problem has disappeared. No more floating point exceptions from within the driver!

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