[Mesa-dev] [Bug 100151] Front buffer drawing mode shows black window with gallium software rasterizers

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100151

--- Comment #12 from Pradeep Yadav <pradeep.yadav at ansys.com> ---
As I mentioned while filing this defect that Mesa's classic software rasterizer
has no such black window issue. So we have potential temporary solution for our
customers who are using older Linux versions.

So for a CentOS version, like 6.x, I downloaded Mesa 13.0.5 sources and built
swrast_dri.so (the classic software rasterizer) and it works (Need to set
LIBGL_DRIVERS_PATH and LD_LIBRARY_PATH to swrast_dri.so path).

But our customers/users cannot build Mesa on their systems. They don't have the
expertise and sometimes their IT support are also not willing to do so.

We cannot provide a pre-built swrast_dri.so to them as it might be incompatible
with the other libraries (dependencies) on customer's system. For example a
customer may be facing this issue on their CentOS 7.x system and if we provide
Mesa 13.0.5 swrast_dri.so, then it might not work.

My questions:

- Is there a way (probably like an environment variable) to activate Mesa's
classic software rasterizer?

- Do we have a documentation of which Mesa version is compatible with which
Linux kernel version?

- On installing CentOS version V, a Mesa version M is installed. How and who
decides Mesa version M corresponding to CentOS version V?

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