Bug 41221

What is the graphics HW used and can you upload the test application as an attachment? Have you tried running es2tri in mesa demos? For me OpenGL ES 2.0 applications compile and run fine with Mesa 7.11 on Intel and on Nvidia.

Hello I have the same problem from the same application like minti
To download the application
svn checkout http://opengles-book-samples.googlecode.com/svn/trunk/LinuxX11
opengles-book-samples-read-only_LinuxX11 

Built all examples with make and run 
Chapter_2/Hello_Triangle/CH02_HelloTriangle 

The output is:

Mesa 7.11 implementation error: Incomplete OpenGL ES 2.0 support.
Please report at bugs.freedesktop.org
Error linking program:
error: program lacks a vertex shader

I forget my hardware set up
-Computer-
Processor		: 2x Intel(R) Atom(TM) CPU N270   @ 1.60GHz
Memory		: 2050MB (900MB used)
Operating System		: Ubuntu 11.10
Resolution		: 1280x1624 pixels
OpenGL Renderer		: Mesa DRI Intel(R) 945GME x86/MMX/SSE2
X11 Vendor		: The X.Org Foundation

The examples from the Orange book use desktop OpenGL.  OpenGL ES 2.0 has the added restriction (compared to desktop OpenGL 2.x) that there *must* be both a vertex shader and a fragment shader.  Since ES2.0 lacks any fixed-function vertex (or fragment) processing, there is no other way.

In the Mesa demos repository, there is a program called es2_info.  Can you add the full output from that program?  It should look something like below.  The exact output will be different because I'm using a different GPU, etc.

EGL_VERSION = 1.4 (DRI2)
EGL_VENDOR = Mesa Project
EGL_EXTENSIONS = EGL_MESA_drm_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_image EGL_KHR_gl_renderbuffer_image EGL_KHR_surfaceless_gles1 EGL_KHR_surfaceless_gles2 EGL_KHR_surfaceless_opengl EGL_NOK_swap_region EGL_NOK_texture_from_pixmap 
EGL_CLIENT_APIS = OpenGL OpenGL_ES OpenGL_ES2 
GL_VERSION: OpenGL ES 2.0 Mesa 7.11.1
GL_RENDERER: Mesa DRI Intel(R) Sandybridge Mobile 
GL_EXTENSIONS:
    GL_EXT_blend_minmax, GL_EXT_multi_draw_arrays, 
    GL_EXT_texture_filter_anisotropic, GL_OES_depth24, 
    GL_OES_element_index_uint, GL_OES_fbo_render_mipmap, GL_OES_mapbuffer, 
    GL_OES_rgb8_rgba8, GL_OES_stencil8, GL_OES_texture_3D, 
    GL_OES_texture_npot, GL_OES_EGL_image, GL_OES_depth_texture, 
    GL_OES_packed_depth_stencil, GL_EXT_texture_type_2_10_10_10_REV, 
    GL_EXT_texture_format_BGRA8888

Here's my output from a G33 system which uses the same driver as the reporter's system.

EGL_VERSION = 1.4 (DRI2)
EGL_VENDOR = Mesa Project
EGL_EXTENSIONS = EGL_MESA_drm_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_image EGL_KHR_gl_renderbuffer_image EGL_KHR_surfaceless_gles1 EGL_KHR_surfaceless_gles2 EGL_KHR_surfaceless_opengl EGL_NOK_swap_region EGL_NOK_texture_from_pixmap EGL_NV_post_sub_buffer 
EGL_CLIENT_APIS = OpenGL OpenGL_ES OpenGL_ES2 
GL_VERSION: OpenGL ES 2.0 Mesa 7.11.2
GL_RENDERER: Mesa DRI Intel(R) G33 
GL_EXTENSIONS:
    GL_EXT_blend_minmax, GL_EXT_multi_draw_arrays, 
    GL_EXT_texture_filter_anisotropic, GL_OES_depth24, 
    GL_OES_element_index_uint, GL_OES_fbo_render_mipmap, GL_OES_mapbuffer, 
    GL_OES_rgb8_rgba8, GL_OES_stencil8, GL_OES_texture_3D, 
    GL_OES_texture_npot, GL_OES_EGL_image, GL_OES_depth_texture, 
    GL_OES_packed_depth_stencil, GL_EXT_texture_type_2_10_10_10_REV, 
    GL_EXT_texture_format_BGRA8888