Bug 19666 - [i915 FBO] Glean case/fbo failed in rendering to depth texture
Summary: [i915 FBO] Glean case/fbo failed in rendering to depth texture
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i915 (show other bugs)
Version: unspecified
Hardware: Other Linux (All)
: low normal
Assignee: Eric Anholt
QA Contact:
Depends on:
Blocks: intel-3d-release
  Show dependency treegraph
Reported: 2009-01-20 19:45 UTC by zhao jian
Modified: 2015-06-16 08:10 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

xorg.conf (3.76 KB, text/plain)
2009-01-20 19:45 UTC, zhao jian
xorg.0.log (69.09 KB, text/plain)
2009-01-20 19:45 UTC, zhao jian
test result of fbo (2.21 KB, text/plain)
2009-01-20 19:46 UTC, zhao jian

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Description zhao jian 2009-01-20 19:45:13 UTC
Created attachment 22117 [details]

System Environment:
Host:           x-945gm
Arch:           i386
OSD:            Fedora release 9 (Sulphur)
Kernel:         2.6.28
Libdrm:         (master)18d3cc076b53f2032eed1f9a4b21947f4cb9e4e7
Mesa_stable:            (intel-2008-q4)200fa9165d7078a6f36c5c9d3e0c997c2438bde3
Xorg:           7.2
Xserver_stable:  (server-1.6-branch)  251d0d8090322b2c9dc0c8b7bef001f338d19433
Xf86_video_intel_stable:  (xf86-video-intel-2.6-branch)5cd65d965c8ed388275fe2084553302aad601d4a

Bug detailed description:
On 915 or 945 machines, run the test case of fbo in glean cases then you will find "rendering to depth texture failed". 

Reproduce Steps:
1. xinit&
2. gnome-session&
3. run the glean cases.
Comment 1 zhao jian 2009-01-20 19:45:44 UTC
Created attachment 22118 [details]
Comment 2 zhao jian 2009-01-20 19:46:23 UTC
Created attachment 22119 [details]
test result of fbo
Comment 3 Eric Anholt 2009-10-23 14:59:13 UTC
Comment 4 zhao jian 2009-11-15 23:33:53 UTC
(In reply to comment #3)
> bisect?

But I find it failed from 20080826, the day GL_EXT_framebuffer_object was supported. Before that it was not supported.
Comment 5 Eric Anholt 2009-11-16 17:52:01 UTC
OK, we don't really expect bug reports for always-failing testcases at this point -- our priority is regressions and improving issues that are impacting applications.
Comment 6 Eric Anholt 2010-09-24 11:35:50 UTC
This was a bug in the testcase when handling an unsupported framebuffer in a previous test.  Yet another reason why you should never build tests that test more than one thing at a time.

commit 35122d69307f0b9c88bc143715f616be80ac5cae
Author: Eric Anholt <eric@anholt.net>
Date:   Fri Sep 24 11:28:49 2010 -0700

    glean/tfbo: Properly clean up when the driver reports unsupported.
    Fixes spurious test failures on the intel driver.
Comment 7 zhao jian 2010-12-29 22:17:03 UTC
It still fails on Pineview now with the same error info as following. 

libGL: OpenDriver: trying /opt/X11R7/lib/dri/i915_dri.so
GL_EXT_framebuffer_object is supported
GL_ARB_framebuffer_object is not supported
  depth = 0, stencil = 1
  (0, 0) = [0.000000, 0.000000, 0.000000], is expected to be[1.000000, 0.000000, 0.000000]
FAILURE: Render to single texture failed (at tfbo.cpp:850)
  mode = 2
  depth = 1, stencil = 0
  (14, 0) = [0.749020, 0.749020, 0.749020], is expected to be[1.000000, 1.000000, 1.000000]
FAILURE: Render to depth texture failed (at tfbo.cpp:1155)
fbo:  FAIL rgba8, db, z24, s8, win+pmap, id 33
        6 tests passed, 2 tests failed.

Tested with: 

Libdrm:        (master)2.4.23-4-gbad5242a59aa8e31cf10749e2ac69b3c66ef7da0
Mesa:        (master)df4d83dca4618eb7077637865763d3e9ab750d11
Xf86_video_intel:        (master)
Cairo:        (master)a4ae7d59be2e545afc30c35b2235b89860e2003a
Kernel:    (drm-intel-next) 608ca70d22c0ea0d52aa71f52b8e326055c274d1
Comment 8 zhao jian 2010-12-29 23:26:37 UTC
some more info is I tested it with both the glean source contained in piglit test and the glean source from glean.git.sourceforge.net.

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