[Bug 107428] Flickering artifacts in OpenRA with Vega 56

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107428

            Bug ID: 107428
           Summary: Flickering artifacts in OpenRA with Vega 56
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: isaaccurtis1 at gmail.com

Created attachment 140898
  --> https://bugs.freedesktop.org/attachment.cgi?id=140898&action=edit
Capture of artifacts during menu screen.

System is Arch Linux running kernel 4.17.10 with Mesa 18.1.4.

glinfo line:
GL_VERSION: 3.1 Mesa 18.1.4
GL_RENDERER: Radeon RX Vega (VEGA10, DRM 3.25.0, 4.17.10-1-zen, LLVM 6.0.1)
GL_VENDOR: X.Org
GL_SHADING_LANGUAGE_VERSION = 1.40
GLU_VERSION: 1.3
GLU_EXTENSIONS: GLU_EXT_nurbs_tessellator GLU_EXT_object_space_tess 
GLUT_API_VERSION: 4
GLUT_XLIB_IMPLEMENTATION: 13

When opening the game a large number of blocky artifacts appear making fonts
unintelligible and the game unplayable. The artifacts are not static and move
around, much like static. 

OpenRA is an open source game engine. This is a new bug that has been isolated
to a particular commit:
https://github.com/OpenRA/OpenRA/commit/bfcbe8c0043bfadd1b38c4987f133e29aa54275c

However, this is the only GPU that currently displays this bug that has been
found.

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