[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101844

GitLab Migration User  changed:

   What|Removed |Added

 Resolution|--- |MOVED
 Status|NEW |RESOLVED

--- Comment #8 from GitLab Migration User  ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1013.

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[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101844

--- Comment #7 from Fabian Maurer  ---
Sorry, look like I was wrong. There seem to always have been artifacts, but
since a newer Minecraft version they're colorful instead of black, making them
way more noticeable.

"LIBGL_ALWAYS_SOFTWARE=1" reduces the artifacts massively, and
"GALLIUM_DRIVER=swr LIBGL_ALWAYS_SOFTWARE=1" removes them.

Now, since I can't do a regression test, is there another way I could help?

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[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101844

--- Comment #6 from Timothy Arceri  ---
(In reply to Timothy Arceri from comment #3)
> A quick look at the trace shows a bunch of errors messages due to the game
> expecting the GL_NV_fog_distance extensions functionality to be available.

Sorry this error message was happening on i965 which doesn't have the extension
enable for some reason, these errors are not reported on gallium drivers.

Also there are no artifacts when running on i965 so it would seem this is a
gallium issue rather than a core mesa problem.

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[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

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https://bugs.freedesktop.org/show_bug.cgi?id=101844

--- Comment #5 from Timothy Arceri  ---
(In reply to Fabian Maurer from comment #4)
> Yes, the fog is buggy too. But is this relevant to the pixel errors? It used
> to work, after all.

Ok I see what you are talking about now. If it used to work it would be very
helpful if you could do a git bisect of a working commit vs master.

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[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

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https://bugs.freedesktop.org/show_bug.cgi?id=101844

--- Comment #4 from Fabian Maurer  ---
Yes, the fog is buggy too. But is this relevant to the pixel errors? It used to
work, after all.

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[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101844

--- Comment #3 from Timothy Arceri  ---
A quick look at the trace shows a bunch of errors messages due to the game
expecting the GL_NV_fog_distance extensions functionality to be available.

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[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

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https://bugs.freedesktop.org/show_bug.cgi?id=101844

--- Comment #2 from Fabian Maurer  ---
Created attachment 132770
  --> https://bugs.freedesktop.org/attachment.cgi?id=132770=edit
Screenshot how it should look like (windows closed amd driver)

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[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

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https://bugs.freedesktop.org/show_bug.cgi?id=101844

--- Comment #1 from Fabian Maurer  ---
Created attachment 132769
  --> https://bugs.freedesktop.org/attachment.cgi?id=132769=edit
Screenshot with artifacts (mesa)

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[Mesa-dev] [Bug 101844] Artifacts in form of wrong pixels appearing on some surfaces

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101844

Bug ID: 101844
   Summary: Artifacts in form of wrong pixels appearing on some
surfaces
   Product: Mesa
   Version: git
  Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
  Severity: normal
  Priority: medium
 Component: Mesa core
  Assignee: mesa-dev@lists.freedesktop.org
  Reporter: dark.shad...@web.de
QA Contact: mesa-dev@lists.freedesktop.org

Created attachment 132768
  --> https://bugs.freedesktop.org/attachment.cgi?id=132768=edit
Minecraft trage file showing the corruption

Title says it all, will attach screenshots in the following comments.
Apitrace attached.

Images both taken from frame 600 of the trace file:
-One on linux
-One on win10 with latest closed source AMD drivers.

LIBGL_ALWAYS_SOFTWARE doesn't make a difference.

System the bug was tested on:
- Arch Linux 64bit
- Linux 4.12.2, AMDGPU driver
- Mesa 17.2.0-devel (git-80a0c9745c) / Mesa 17.1.4
- Radeon R9 285

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