[Mesa-dev] [Bug 105506] Vulkan MSAA is broken on SI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105506

            Bug ID: 105506
           Summary: Vulkan MSAA is broken on SI
           Product: Mesa
           Version: git
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Vulkan/radeon
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: turo at alternativegames.net
        QA Contact: mesa-dev at lists.freedesktop.org

Created attachment 138105
  --> https://bugs.freedesktop.org/attachment.cgi?id=138105&action=edit
Screenshot

MSAA is broken on Vulkan with SI card (Pitcairn) causing graphical artefacts.
All MSAA modes are affected. OpenGL works. The same code works on Windows with
AMD's driver and on Nvidia GPU with their proprietary drivers. No warnings from
Vulkan validation layers. Broken versions are 17.3.6 (Debian package),
18.0.0rc4 (likewise) and master fcf267ba087dd00c48ceaf9277424dac079f9319
(self-built, with LLVM 6.0). Kernel is 4.14.17 from Debian testing.

The test program is here:
https://github.com/turol/smaaDemo
Use command line parameters "-m msaa -q 8" to get directly to the broken
effect.

#103999 is possibly related but I'm using RGBA8srgb instead of RG32F.

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