[Mesa-dev] [Bug 110539] radv: OBS video capture broken by anti-aliasing in Vulkan games after upgrade to Mesa 19

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110539

            Bug ID: 110539
           Summary: radv: OBS video capture broken by anti-aliasing in
                    Vulkan games after upgrade to Mesa 19
           Product: Mesa
           Version: 19.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Vulkan/radeon
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: v34969 at nwytg.net
        QA Contact: mesa-dev at lists.freedesktop.org

Kubuntu 18.04.2
Kernel 4.18.0-18
Mesa 19.0.1-3~b~padoka0 (Padoka Stable PPA)
Radeon RX 570
Ryzen 7 1700X
Proton 4.2-3 (where applicable)


After upgrading today from 18.3.3, I noticed OBS Studio's video capture of all
tested Vulkan games becomes exceptionally dark and washed out. This could not
be resolved through any change to OBS' capture settings or color space
settings.

I found this bug to be directly related to anti-aliasing in all tested DXVK
titles, but AA settings seemed to have no effect in No Man's Sky, a Vulkan
title run through Wine (thus not using DXVK).

The bug did not appear in any tested native OpenGL games, or Wine games that
used WineD3D.

In 2 affected DXVK titles, setting the game to use FXAA appears to resolve the
issue. Any other setting, including Off or Disabled, brings on the bug.

Here is a video showing the bug in action in an OBS recording of Redout:
https://youtu.be/y5v-PDoVzNo

No Man's Sky was still affected with FXAA enabled. This is a non-native game
which uses Vulkan as its primary renderer (when using the beta branch). I am
not sure if I own a fully native game which uses Vulkan first.

I don't know if bug 110259 is related to this. That's the only radv issue fixed
in subsequent patch notes.

Your help is much appreciated as this is a serious problem for those of us who
stream games on Linux. Thank you!

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