Re: egl *_screen on ubuntu w/ NVIDIA w/o X

                                   I am still missing something fundamental...

I have an nvC0 family NVD9 GF119 Quadro NVS 4200M graphics card on a
dell latitude e6520 laptop running  ubuntu 12.04

I can compile mesa for with:
./autogen.sh --prefix=$INSTALl --enable-egl --enable-gles1
--enable-gles2 --enable-gallium-egl --enable-gallium-gbm
--with-egl-platforms=drm,fbdev,x11 --enable-gbm --enable-shared-glapi
--with-gallium-drivers=nouveau,r300,r600,swras


WORKS> EGL_PLATFORM=x11 ~/mesa-demos/src/egl/opengl/eglgears_x11
WORKS> EGL_PLATFORM=fbdev ~/mesa-demos/src/egl/opengl/eglgears_screen

FAILS> EGL_PLATFORM=drm ~/mesa-demos/src/egl/opengl/eglgears_screen
(eglinfo has the same results as above)

Drilling down with the debugger the application fails to create a
screen/surface.

The gbm backend: gbm_gallium_drm.so is hardcoded in
~/mesa/src/gallium/state_trackers/egl/drm/native_drm.c:
setenv("GBM_BACKEND", "gbm_gallium_drm.so", 1);


NULL is returned from dd->create_screen in
~/mesa/src/gallium/auxiliary/pipe-loader/pipe_loader_drm.c ::
pipe_loader_drm_create_screen()
(I cant resolve dd->create_screen() yet since I cant get gdb to step
into it, must be a dlopen lib)

This causes ~/mesa/src/gallium/targets/gbm/gbm.c::gallium_screen_create()
to call pipe_loader_release() which seems to close the
/dev/dri/screen0 file descriptor



mesa-demos compiled against libgl1-mesa-dri-experimental in
usr/lib/i386-linux-gnu/mesa-egl
also has the same results as above. (sans fbdev)

Any pointers are appreciated, thanks for looking.




eglgears_screen output:
localhost:~/demos$ MESA_DEBUG=1 EGL_LOG_LEVEL=debug
LIBGL_DEBUG=verbose EGL_PLATFORM=drm src/egl/opengl/eglgears_screen
libEGL debug: Native platform type: drm (environment overwrite)
libEGL debug: EGL search path is /usr/lib/i386-linux-gnu/egl
libEGL debug: added /usr/lib/i386-linux-gnu/egl/egl_gallium.so to module array
libEGL debug: added egl_dri2 to module array
libEGL debug: added egl_glx to module array
libEGL debug: dlopen(/usr/lib/i386-linux-gnu/egl/egl_gallium.so)
libEGL info: use DRM for display (nil)
libEGL debug: EGL user error 0x3001 (EGL_NOT_INITIALIZED) in
eglInitialize(no usable display)

libEGL info: use DRM for display (nil)
libEGL debug: EGL user error 0x3001 (EGL_NOT_INITIALIZED) in
eglInitialize(no usable display)

libEGL debug: EGL user error 0x3001 (EGL_NOT_INITIALIZED) in eglInitialize

EGLUT: failed to initialize EGL display