[Bug 108282] Mesa 18.2.x makes glxinfo show problems, 18.1.9 is OK [bisected]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108282

--- Comment #12 from Marina Chernish <zmiy.maryna at gmail.com> ---
Hi Brodo,

Finally I managed to reproduce this issue on 32x Ubuntu 16.04 (unfortunately
had bad luck with Slackware). Also checked mentioned commit
66c61797ada12e0e2b396affcc2dc495b6cc04ed and from my side glxinfo has no issues
on it.

Here is my result of bisecting:
a363bb2cd0e2a141f2c60be005009703bffcbe4e is the first bad commit
commit a363bb2cd0e2a141f2c60be005009703bffcbe4e
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Tue Apr 10 01:18:25 2018 -0700

        i965: Allocate VMA in userspace for full-PPGTT systems.

        This patch enables soft-pinning of all buffers, allowing us to skip
        relocation processing entirely.  All systems with full PPGTT and > 4GB
        of VMA should gain these benefits.  This should be most Gen8+.

        Unfortunately, this excludes a few systems:
        - Cherryview (only has 32-bit addressing, despite 48-bit pointers)
        - Broadwell with a 32-bit kernel
        - Anybody running pre-4.5 kernel.

        We may enable it for Cherryview in the future, but it would require
        some tweaks to the memory zone.

Used environment: 
Intel® HD Graphics 520; Intel Core i3-6006U; kernel 4.18.13-041813-generic;

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