[Bug 101259] General artifacts shortly after CPU warming up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101259

--- Comment #17 from liang <clamfly at sina.com> ---
kernel 4.12.4 is out for arch users, so I gave it a try and have the folling.
    (a) mesa-17.0.5 & kernel-4.11.9,  reported, not perfect but usable;
    (b) mesa-17.1.4 & kernel-4.11.9,  reported, unusable;
    (c) mesa-17.1.4 & kernel-4.12.4,  same as (a), not perfect but usable;
    (d) mesa-master(7ea4cda2ab) & kernel-4.12.4, really sketchy, no menu shown,
worse than (b)
    (e) mesa-17.2-branchpoint & kernel-4.12.4, same as (d)
    (f) mesa-17.2-branchpoint & kernel-4.11.9, same as (d)

It seems some modification in the kernel got things back on track, and later
modifications in mesa between 17.1-branchpoint & 17.2-branchpoint break it
again. So, stay with kernel-4.12.4, I do another bisect, between
17.1-branchpoint & 17.2-branchpoint ...

>  38e2142f392f9b6ac78eab72a1f92dd37553e1d8 is the first bad commit
>  commit 38e2142f392f9b6ac78eab72a1f92dd37553e1d8
>  Author: Kenneth Graunke <kenneth at whitecape.org>
>  Date:   Mon Jul 17 12:46:58 2017 -0700
>
>      i965/bufmgr: Explicitly wait instead of using I915_GEM_SET_DOMAIN.
>    
>      With the advent of asynchronous maps, domain tracking doesn't make a
>      whole lot of sense.  Buffers can be in use on both the CPU and GPU at
......

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