[Bug 108097] Rendering issues in SolveSpace

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108097

            Bug ID: 108097
           Summary: Rendering issues in SolveSpace
           Product: Mesa
           Version: 18.2
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: nazar at mokrynskyi.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Bug report in SolveSpace itself:
https://github.com/solvespace/solvespace/issues/358

The issue is that after upgrading from 18.1.5 to 18.2.1 (also tried 18.3 git
after that with the same result) on Ubuntu 18.10 I have an issue in SolveSpace
that prevents view from being rendered until window is resized.

It worked in 18.1.5 as packaged in Ubuntu 18.10 and works with
`LIBGL_ALWAYS_SOFTWARE=1 solvespace` under 18.3 git.
So this seems to indicate a regression in i965 somewhere between 18.1.5 and
18.2.1.

I'm currently using iGPU on Core i7 8700k:
nazar-pc at nazar-pc ~> glxinfo | grep OpenGL
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) UHD Graphics 630 (Coffeelake 3x8 GT2) 
OpenGL core profile version string: 4.5 (Core Profile) Mesa 18.3.0-devel
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 18.3.0-devel
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 18.3.0-devel
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:

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