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Latest graphics drivers crash with QtOpenGL QGLWidget

GraphicsDriverTester
372 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 Retired Employee
362 Views

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

...S

GabrieleGiuseppini
295 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?

GabrieleGiuseppini
279 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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