OpenGL version test failed for osgdem

[Omkaranathan]

Hi all,

I got the following error while trying to use osgdem(VPB). I am using
RedHatLinux and ATI X1900 graphics card.
OSG applications are working normally.

Error: In Texture::Extensions::setupGLExtensions(..) OpenGL version test
failed, requires valid graphics context.
Scaling image 'output_L0_X0_Y0.dds' from (256,256) to (0,0)
Segmentation fault


Thanks in advance
Om

[Robert Osfield]

Post by Omkaranathan
Hi all,
I got the following error while trying to use osgdem(VPB). I am using
RedHatLinux and ATI X1900 graphics card.
OSG applications are working normally.
Error: In Texture::Extensions::setupGLExtensions(..) OpenGL version test
failed, requires valid graphics context.
Scaling image 'output_L0_X0_Y0.dds' from (256,256) to (0,0)
Segmentation fault

Which version of VPB are you working with?

[Omkaranathan]

Post by Robert Osfield

Post by Omkaranathan
Hi all,
I got the following error while trying to use osgdem(VPB). I am using
RedHatLinux and ATI X1900 graphics card.
OSG applications are working normally.
Error: In Texture::Extensions::setupGLExtensions(..) OpenGL version test
failed, requires valid graphics context.
Scaling image 'output_L0_X0_Y0.dds' from (256,256) to (0,0)
Segmentation fault

Which version of VPB are you working with?

version - 0.9.1
Everything was working fine with NVIDIA-6600 card. Changed to ATI card
yesterday and getting the error.

Thanks
Om

[Omkaranathan]

Post by Robert Osfield

Post by Omkaranathan
Hi all,
I got the following error while trying to use osgdem(VPB). I am using
RedHatLinux and ATI X1900 graphics card.
OSG applications are working normally.
Error: In Texture::Extensions::setupGLExtensions(..) OpenGL version test
failed, requires valid graphics context.
Scaling image 'output_L0_X0_Y0.dds' from (256,256) to (0,0)
Segmentation fault

Which version of VPB are you working with?

version - 0.9.1
Everything was working fine with NVIDIA-6600 card. Changed to ATI card
yesterday and getting the error now.

Thanks
Om

[Robert Osfield]

Post by Omkaranathan
version - 0.9.1
Everything was working fine with NVIDIA-6600 card. Changed to ATI card
yesterday and getting the error now.

This strongly suggest and OpenGL driver limitation/bug of some kind.
osgdem tries to create a graphics context for the purpose of OpenGL
compression of textures, first it tries to create a pbuffer, then
falls back to a standard graphics window if this fails.

Could you try the SVN version of VPB. The code invoking the graphics
context is a little different, its a long shot but possibly worth
trying, it might give you a bit more feedback what's up.

Robert.