[Bug 97022] Garbage in windows while running a game windowed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97022

--- Comment #10 from Peter Mulholland <peter.mulholland at vpltd.com> ---
I am not sure exactly what this comment means, so I will answer as thoroughly
as I can.

I am not 100% sure that "mesa" is the component responsible, it could be drm or
radeonsi. I am not familiar enough with the Mesa components to be sure.

The problem described does not happen with the Mesa 11.2.0 distribution that
Ubuntu Xenial has packaged by default. The problem only occurs when Mesa 12.1.0
is installed using a PPA such as Oibaf or Padoka.

It also does not occur on Mesa 12.0.1 that is part of an installation of
Manjaro (Arch Linux) that I have on the same machine.

The problem does not occur with the nvidia or fglrx binary drivers.

The problem is not just an app crash, but display corruption/kernel panic. This
should not happen due to the behaviour of a userspace app, even if our apps
were doing something "wrong", being able to crash the whole machine is a bug.

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