[Bug 98856] Dirt: Showdown broken graphics

[Bug 98856] Dirt: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

            Bug ID: 98856
           Summary: Dirt: Showdown broken graphics
           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: gr.muench@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

For about 4 weeks the game has polygon distortion especially on the Nevada map.
Its not on every map but it can be seen with the ingame benchmark.


Im on:
Radeon HD 7970
OpenGL renderer string: Gallium 0.4 on AMD TAHITI (DRM 2.48.0 /
4.9.0-rc4-gbc33b0c, LLVM 4.0.0)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 13.1.0-devel
(git-b27be18)

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[Bug 98856] Dirt: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #1 from Samuel Pitoiset <samuel.pitoiset@gmail.com> ---
Could you provide an apitrace that reproduces the issue?

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[Bug 98856] [Regression, SI] DIRT: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

Gregor Münch <gr.muench@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Dirt: Showdown broken       |[Regression, SI] DIRT:
                   |graphics                    |Showdown broken graphics

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[Bug 98856] [Regression, SI] DIRT: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #2 from Gregor Münch <gr.muench@gmail.com> ---
I tried getting this to work but I dont get any output file.

DEBUGGER="apitrace trace" steam steam://rungameid/201700
What am Im doing wrong here?

I installed:
apitrace
lib32-apitrace


If you want to do a regression testing,
this somewhat broke arround here:
https://cgit.freedesktop.org/mesa/mesa/commit/?id=74e39de9324d2d2333cda6adca50ae2a3fc36de2

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[Bug 98856] [Regression, SI] DIRT: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #3 from Samuel Pitoiset <samuel.pitoiset@gmail.com> ---
Does reverting that commit fix the issue?

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[Bug 98856] [Regression, SI] DIRT: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #4 from Gregor Münch <gr.muench@gmail.com> ---
I managed to get a trace. Hope it works for you.

https://drive.google.com/open?id=0B5KUmMDAwP-iUFNDdEpkd2xUMXc

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[Bug 98856] [Regression, SI] DIRT: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #5 from Gregor Münch <gr.muench@gmail.com> ---
(In reply to Samuel Pitoiset from comment #3)
> Does reverting that commit fix the issue?

I can't test (I would do if someone could show me how). I do weekly Mesa builds
and Im quite sure it broke in the week when this commit appeared.

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[Bug 98856] [Regression, SI] DIRT: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #6 from Gregor Münch <gr.muench@gmail.com> ---
Problem is still there as of mesa git from Friday.
Also, the trying replaying my trace hangs the GPU.

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[Bug 98856] [Regression, SI] DIRT: Showdown broken graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #7 from Gregor Münch <gr.muench@gmail.com> ---
I finally was able to start bisecting this, I was going back to Mesa from early
October but couldnt find the culprit. I used PKGBUILD provided from here:
https://aur.archlinux.org/packages/lib32-mesa-git/
Then I followed these instructions:
https://wiki.archlinux.org/index.php/Arch_User_Repository#Installing_packages
https://wiki.archlinux.org/index.php/Bisecting_bugs

I guess since the executable name of the game is dirt.i386 so bisecting the
32bit package is the right one?

Im a bit lost here, I will try older Kernel and libdrm but after that Im
running out of ideas what could caused this, any other ideas would be
appreciated.

BTW, judging from the screenshots in
https://bugs.freedesktop.org/show_bug.cgi?id=99136 it looks this is the same
problem. Its interesting to see that enabling a minor heavy graphic option
causes such crazy graphical corruption. He enables blood effects and in Dirt
you have to set Crowd from OFF to LOW or higher. While ULTRA option makes the
problem even worse.


Fun Fact: I tested Tomb Raider Benchmark, and the average FPS on went from
48fps with Mesa from October to 58fps with current Mesa git. So really good job
on this!

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[Bug 98856] DIRT: Showdown broken graphics with Mesa built with -Ofast

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

Gregor Münch <gr.muench@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[Regression, SI] DIRT:      |DIRT: Showdown broken
                   |Showdown broken graphics    |graphics with Mesa built
                   |                            |with -Ofast

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[Bug 98856] DIRT: Showdown broken graphics with Mesa built with -Ofast

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #8 from Gregor Münch <gr.muench@gmail.com> ---
Created attachment 130076
  --> https://bugs.freedesktop.org/attachment.cgi?id=130076&action=edit
garbled graphics #1

Found the problem. Seems like using -Ofast wasnt a good idea. Using -03
everything works as it should.
Still attaching screenshot showing the problem in case it is useful to others.

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[Bug 98856] DIRT: Showdown broken graphics with Mesa built with -Ofast

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

Vedran Miletić <vedran@miletic.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |77449


Referenced Bugs:

https://bugs.freedesktop.org/show_bug.cgi?id=77449
[Bug 77449] Tracker bug for all bugs related to Steam titles
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[Bug 98856] DIRT: Showdown broken graphics with Mesa built with -Ofast

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

--- Comment #9 from Gregor Münch <gr.muench@gmail.com> ---
Still the same with -Ofast.

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[Bug 98856] DIRT: Showdown broken graphics with Mesa built with -Ofast

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https://bugs.freedesktop.org/show_bug.cgi?id=98856

Timothy Arceri <t_arceri@yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |NOTABUG

--- Comment #10 from Timothy Arceri <t_arceri@yahoo.com.au> ---
Ofast disregards strict standards compliance. -Ofast enables all -O3
optimizations. It also enables optimizations that are not valid for all
standard-compliant programs.

In other words don't use it with Mesa :)

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