glxgears with black screen

Luc Moulinier

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Mar 22, 2011, 11:59:57 AM3/22/11

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Hello !

I encounter a problem when running glxgears.
I run glxgears on a Linux box under Fedora 14 through an X PC server
running on my windows machine (Xming 6.9.0.31)
The glxgears -info output is :
surf_alitest_> glxgears -info
GL_RENDERER = GDI Generic
GL_VERSION = 1.1.0
GL_VENDOR = Microsoft Corporation
GL_EXTENSIONS = GL_ARB_transpose_matrix GL_EXT_bgra
GL_EXT_draw_range_elements GL_EXT_multi_draw_arrays
GL_SUN_multi_draw_arrays
18271 frames in 5.0 seconds = 3649.873 FPS
17356 frames in 5.0 seconds = 3468.672 FPS
17099 frames in 5.0 seconds = 3418.125 FPS

but the screen is desesperatly black !!

Does someone have a clue ??

Thanks in advance for any help !
Luc

jbwest

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Mar 22, 2011, 8:24:45 PM3/22/11

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"Luc Moulinier" <luc.mo...@igbmc.fr> wrote in message
news:fae56b5b-249d-49ee...@b22g2000prb.googlegroups.com...

GDI generic means that xming can't find a suitable OpenGL driver on your PC.
i *think* xming can run accelerated of there's a good driver on your pc.

You'd be better off with VirtualGL if your fedora machine has a decent
graphics card.

jbw

Luc Moulinier

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Mar 23, 2011, 8:57:05 AM3/23/11

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Thanks for answering !

But there is something I don't understand. If I connect my PC to an
other machine (an other linux machine) then glxgears is working
correctly.
You are saying that "Xming can't find a suitable oprnGL driver on my
PC" . Does that mean that for example, the linux box is asking for a
driver able to understand OpenGL 2.0 , and Xming can't ? Or you are
talking of the linux box itself ?

Thanks again !
Luc

Luc Moulinier

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Mar 23, 2011, 11:54:22 AM3/23/11

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To be more precise :
Here is the glxgears -info output when glxgears is launched from a
linux box when the PC X server is Exceed 3D :

star3_alitest_> glxgears -info

GL_RENDERER = GDI Generic
GL_VERSION = 1.1.0
GL_VENDOR = Microsoft Corporation

GL_EXTENSIONS = GL_ARB_transpose_matrix GL_EXT_draw_range_elements
GL_EXT_multi_draw_arrays GL_SUN_multi_draw_arrays
3264 frames in 5.1 seconds = 636.290 FPS
1821 frames in 5.0 seconds = 360.975 FPS
1820 frames in 5.0 seconds = 360.993 FPS

Here is the output when glxgears is launched from the same linux box
but when Xming is the PC X server :
star3_alitest_> glxgears -info

GL_RENDERER = GDI Generic
GL_VERSION = 1.1.0
GL_VENDOR = Microsoft Corporation
GL_EXTENSIONS = GL_ARB_transpose_matrix GL_EXT_bgra
GL_EXT_draw_range_elements GL_EXT_multi_draw_arrays
GL_SUN_multi_draw_arrays

18143 frames in 5.0 seconds = 3600.573 FPS
17031 frames in 5.0 seconds = 3388.431 FPS
17164 frames in 5.0 seconds = 3420.114 FPS

But with Xming the screen is black.

Note that in both case there is GDI_generic, and that the FPS with
Xming is 10 times bigger that Exceed .

Can someone give me some explanations ?.

Many thanks !!

Luc

jbwest

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Mar 23, 2011, 7:43:10 PM3/23/11

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"Luc Moulinier" <luc.mo...@igbmc.fr> wrote in message

news:baa71bd1-6420-44b4...@d16g2000yqd.googlegroups.com...

GDI generic means that you don't have a OpenGL driver worth a darn on your
PC. It's so broken. Try to find an opengl driver for your pc's hardware. If
you don't have a 3d card on your pc, but you do on your linux box, then try
VirtualGL.

There are any number of differences on 2 entirely different versions of an
X-Window server. Why is it black? Something's broken in Xming, that's why.
Debug the source code to find out why... we'd appreciate a fix.

jbw