Bug 45878

Summary: [PNV]oglc multitex(basic.allCases) regressed on pineview
Product: Mesa Reporter: fangxun <xunx.fang>
Component: Drivers/DRI/i915Assignee: Ian Romanick <idr>
Status: CLOSED DUPLICATE QA Contact:
Severity: major    
Priority: high    
Version: git   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Bug Depends on:    
Bug Blocks: 42993    

Description fangxun 2012-02-10 03:06:48 UTC 
System Environment:
--------------------------
Arch:           i386
Platform:       Pineview
Libdrm:         (master)2.4.31-1-g2cfac57d364d0166ed9472b086c16aea376f495a
Mesa:           (8.0)e86d90eb208292916c8a04c5d75499492003dd16
Xserver:      (server-1.11-branch)xorg-server-1.11.3
Xf86_video_intel:  (master)2.17.0-644-g4d8369f8e60fd4f5a0ef49f3e9866ea5ecb21927
Kernel:         (drm-intel-fixes) 617cf884810b44384fe8e9431e9babeb80a2ff37

Bug detailed description:
------------------------- 
It fails at mesa master and mesa 8.0 branch on pineview. Bisect fails due to some mesa commit build failure. The last known bad commit is
caebd7929dca802ece8ef36b0f85094d66133b57, the last known good commit is 1b33ae3a7da160033a2dc7abe6ef46dee3730c2e.


Reproduce steps:
----------------
1. start X
2. ./oglconform -z -s -suite all -v 2 -test multitex basic.allCases
Comment 1 Ian Romanick 2012-02-10 11:54:56 UTC 
I don't understand what the problem was bisecting.  I was able to bisect to

commit 85a52bf7b5f5f0317d15a51f94f294fc5e72d936
Author: Ian Romanick <ian.d.romanick@intel.com>
Date:   Thu Jan 19 17:29:37 2012 -0800

    swrast: Use fixed-function processing instead _TexEnvProgram for DrawPixels
    
    This is a hack to work around drivers such as i965 that:
    
        - Set _MaintainTexEnvProgram to generate GLSL IR for
          fixed-function fragment processing.
        - Don't call _mesa_ir_link_shader to generate Mesa IR from the
          GLSL IR.
        - May use swrast to handle glDrawPixels.
    
    Since _mesa_ir_link_shader is never called, there is no Mesa IR to
    execute.  Instead do regular fixed-function processing.
    
    Even on platforms that don't need this, the software fixed-function
    code is much faster than the software shader code.
    
    NOTE: This is a candidate for the 8.0 branch.
    
    Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
    Reviewed-by: Brian Paul <brianp@vmware.com>
    Reviewed-by: Eric Anholt <eric@anholt.net>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44749
    (cherry picked from commit 9be3be3c6654da18466626c2d45ff4d06b5fb953)

*** This bug has been marked as a duplicate of bug 45872 ***

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