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

--Platform: i965

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

--2D driver:
commit 502e41f6dff91393cfeaf08c9ba312781d1b7267

--3D driver:
commit d76545de5730f52328a81b8371d3b08cd7511e05

--Xserver:
commit 34b69e3bc0e6462eb60029fbcb4f5479494007a2

--Drm
commit 92a30dd608c2838dea97efc04e1447056f37d0b5

--Kernel:
2.6.23


Bug detailed description:
-------------------------
glean crash X around pbo case.
but This issue doesn't happen when pbo case is run alone.
we need to run glean from beginning to reproduce this issue.



Reproduce steps:
----------------
1. start X
2. ./glean -r result


Current result:
----------------
GL_ARB_pixel_buffer_object is supported
FAILURE: glBitmap failed (at tpbo.cpp:507)
  got (0, 0) = [0.000000, 0.000000, 0.000000], should be [1.000000, 1.000000, 1.000000]
FAILURE: glGetTexImage failed (at tpbo.cpp:694)
  got (0) = [0.000000, 0.000000, 0.000000], should be intel_bufmgr_ttm.c:644: Error mapping buffer front: Cannot allocate memory .
intel_bufmgr_ttm.c:644: Error mapping buffer depth: Cannot allocate memory .
glean: ../../../../../src/mesa/drivers/dri/common/spantmp2.h:373: intelReadRGBASpan_ARGB8888: Assertion `irb->pfMap' failed.
[1.000000, 1.000000, 0.000000]
pbo:  FAIL rgba8, db, z24, s8, win+pmap, id 33
        8 tests passed, 2 tests failed.
GL_ARB_pixel_buffer_object is supported
run.Glean.sh: line 18:  5381 Killed                  Xorg



Expected result:
----------------
X should not be crashed by glean