[Bug 110924] Alien: Isolation - Flashing squares in upper half of screen when HDAO enabled

* [Bug 110924] Alien: Isolation - Flashing squares in upper half of screen when HDAO enabled
@ 2019-06-15 11:18 bugzilla-daemon
  2019-07-08  3:39 ` bugzilla-daemon
  0 siblings, 1 reply; 2+ messages in thread
From: bugzilla-daemon @ 2019-06-15 11:18 UTC (permalink / raw)
  To: dri-devel

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https://bugs.freedesktop.org/show_bug.cgi?id=110924

            Bug ID: 110924
           Summary: Alien: Isolation - Flashing squares in upper half of
                    screen when HDAO enabled
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: chewi@gentoo.org
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 144551
  --> https://bugs.freedesktop.org/attachment.cgi?id=144551&action=edit
Screenshot showing artifacts

This game worked perfectly for me around a year ago. Now it shows strange
flashing/moving mostly black squares in the upper half of the screen when HDAO
is enabled. Please see the attached screenshot. It looks worse when you move.
Choosing "standard" SSAO instead makes the problem go away.

I'm not alone, here is another Steam user reporting the same thing:
https://steamcommunity.com/app/214490/discussions/0/1735468061769831062/

Here are my system details:
OpenGL vendor string: X.Org
OpenGL renderer string: AMD Radeon (TM) RX 480 Graphics (POLARIS10, DRM 3.30.0,
5.1.10-00004-g8b7bb440229b, LLVM 8.0.0)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 19.2.0-devel
(git-749c544b84)
OpenGL core profile shading language version string: 4.50

It still happens with Mesa as far back as 18.2.0. Anything earlier just crashes
on my system but the other user reported he was using 18.1.9. I have tried
against LLVM 6, 7, and 8 with no change. I have also booted into a Fedora 28
Live USB system, chrooted into my Gentoo system, and it still happens. It's
possibly down a change in the game itself although I can't verify that and I
don't think it's seeing many changes these days.

Sorry if I've assigned this to the wrong component but it's hard to say where
the problem lies.

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