Created attachment 134449 [details]
The back buffer of apitrace frame 1017, showing red lines along what looks like
primitive edges.

Hi,

I've been poking "ARK: Survival Evolved", trying to get it playable.
The game is notoriously buggy, particularly under Linux, however the biggest
issue I've had seems to be a Mesa/Radeon bug.

Blocky "pixelated" lines are drawn across what look like edges (see attached).
These lines are most frequently red, black or cyan in colour, and seem to
disappear when the scene complexity is lower (like when looking at the floor or
an area with no foliage or rocks).

Setting R600_DEBUG=nohyperz resolves the issue.

I've tested an apitrace of the game on both Mesa git, and 17.2.1 on a desktop
with a POLARIS10 (RX580 8GiB), running the latest amd-staging-drm-next kernel,
and on a laptop with both Intel integrated graphics and a HAINAN (Sun XT?
8670M), running a stock Archlinux kernel.

Both AMD cards have this rendering issue with HyperZ enabled. The Intel card
renders without this particular problem (if slowly), and llvmpipe (eventually)
renders without issue too.

Apitrace (~600MiB!):
https://drive.google.com/open?id=0B6RX1ZACoaJ5UmhDWDM3ZC03eUk


Desktop:
Linux 4.13.0-rc5-43dd6fde5df4 #3 SMP PREEMPT Thu Sep 21 19:15:33 BST 2017
x86_64 GNU/Linux
Mesa 17.3.0-devel (git hash #52ed3bca91ff13217378196d6800ca7113641a63)
libdrm 2.4.83, LLVM 5.0.0

Laptop:
Linux 4.12.13-1-ARCH #1 SMP PREEMPT Fri Sep 15 06:36:43 UTC 2017 x86_64
GNU/Linux
Mesa 1.7.12,
libdrm 2.4.83, LLVM 5.0.0


The corruption does look somewhat like that of this bug, but applied to terrain
as well. https://bugs.freedesktop.org/show_bug.cgi?id=74784