System Environment:
--------------------------

--Platform: i915

--Architecture(32-bit,64-bit,compatiblity): all

--2D driver:
commit 4a42b01f5ee5a673716d6959dfe0e693b037eb48 

--3D driver:
commit d7cf6a8a697a2fb4da171a36968f65aa0f108b27 

--Xserver:
commit 06c968acbf6771d5fed4b12ebd400fea791ea498 

--Drm
commit d6098db1409e8ee45052920d3acdd3b6f2cb80aa

--Kernel:
2.6.23.1


Bug detailed description:
-------------------------
This issue make glean test case occluQry failed on i915.
OpenGL GL_ARB_occlusion_query seems enabled by following commit, but it's actually not working:

commit 1c718c0d78cf4eae9e02b03a0abbec384db948a6
Author: Alan Hourihane <alanh@tungstengraphics.com>
Date:   Fri Feb 22 00:18:54 2008 +0000

    Use drm_i915_sarea instead of drmI830Sarea and remove i830_common.h




Reproduce steps:
----------------
1. start X
2. compile and run attached test case


Current result:
----------------
OpenGL GL_ARB_occlusion_query seems enabled by commit 
but it's actually not working


Expected result:
----------------
GL_ARB_occlusion_query should work when it's enabled