http://bugs.freedesktop.org/show_bug.cgi?id=22310

           Summary: [regression i915 OGLC] 15 cases report "not supported"
           Product: Mesa
           Version: CVS
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i915
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: shuang...@intel.com


System Environment:
--------------------------
Arch:           i386
Platform:       945GM
Libdrm  (master)3d4bfe8c893d016ef43d1ebf28e4607aa1f540a4
Mesa    (master)f5888d9ca56ba68c01a4c9f111174650fac943aa
Xserver         (master)1d20b9021e8aecb942619f64017cc2fc31f02d29
Xf86_video_intel        (master)3da549f5b350dd42516e5cb3576f7fefe012d95e
Kernel  (for-linus)0e7ddf7eeeef5aea85412120539ab5369577faeb 

Bug detailed description:
-------------------------
many OGLC case (like spclear.c, spcorner.c, spfunc.c, pxzoom-depth.c ...) don't
run now. This is caused by following commit:

279143c6e808b37c333321b696d80df77f709a04 is first bad commit
commit 279143c6e808b37c333321b696d80df77f709a04
Author: Owen W. Taylor <otay...@fishsoup.net>
Date:   Sat Jun 6 14:46:22 2009 -0400

    Disable SGI_swap_control extension for DRI2

    We currently don't have support for SGI_swap_control for direct
    contexts with DRI2, so disable reporting the extension. Reporting
    the extension, and then having glXSwapIntervalSGI() "succeed"
    but do nothing can confuse applications.

Reproduce steps:
----------------
1.xinit&
2. run olgc/spclear.c ...


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