[Mesa-dev] [Bug 28280] New: Regression in mesa branch 7.7: glXChooseVisual fails to find visual

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28280

           Summary: Regression in mesa branch 7.7: glXChooseVisual fails
                    to find visual
           Product: Mesa
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: GLX
        AssignedTo: mesa-dev at lists.freedesktop.org
        ReportedBy: m_liertzer at gmx.at


Created an attachment (id=35884)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=35884)
small test program that showsthe regression

Commit 942ec8722d4d903 with the commit message "Fix
__glXInitializeVisualConfigFromTags's handling of unrecognized fbconfig" breaks
the glx function glXChooseVisual, i.e. no visual can be found and the function
always returns 0.

This bug occurs on two completely different PCs (laptop with intel graphics
card/iMac running debian with amd graphics card).

Reverting the commit fixes the bug on both PCs.

I attached a small test program, that shows the regression; several older
libraries (e.g.. the togl/tk library ) still depend on this function and it is
there that I experienced the bug for the first time.

Cheers,
Matthias

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