[Bug 96435] [bisected: 3b4486] Alien: Isolation, shader problems on characters show flickering colors.

[Bug 96435] [bisected: 3b4486] Alien: Isolation, shader problems on characters show flickering colors.

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=96435

            Bug ID: 96435
           Summary: [bisected: 3b4486] Alien: Isolation, shader problems
                    on characters show flickering colors.
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: alexandre.f.demers@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

"Alien: Isolation" began showing some problems related to compute shaders
today. Alien, Ripley and any other characters (droids...) have their appearance
flickering and showing strange colors. Bisecting gave the following.

3b44864ab794ea487d22499e7e2c42565aaac085 is the first bad commit
commit 3b44864ab794ea487d22499e7e2c42565aaac085
Author: Marek Olšák <marek.olsak@amd.com>
Date:   Fri Jun 3 19:17:46 2016 +0200

    radeonsi: fix images with level > 0

    This should fix spec@arb_shader_image_load_store@level.

    Broken by:
        Commit: 95c5bbae66af3ca1f805d94f6fe8d8e4ba2c9c43
        radeonsi: set some image descriptor fields at bind time

    Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

:040000 040000 48196e8b6f41a823b3ec07e9aa21dd3c01ac7edc
e6524187d496af18187effda79adad6b84774f2d M      src

Using latest ddx and drm from git repository, kernel 4.7-rc2 on ArchLinux 64.

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[Bug 96435] [bisected: 3b4486] Alien: Isolation, shader problems on characters show flickering colors.

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=96435

--- Comment #1 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
By the way, using a R9 280X.

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[Bug 96435] [bisected: 3b4486] Alien: Isolation, shader problems on characters show flickering colors.

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https://bugs.freedesktop.org/show_bug.cgi?id=96435

--- Comment #2 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
Well, after playing a bit more, I should say that the culprit commit only
intensify the problem (generalize it to all a whole character). Otherwise,
prior to that commit, it seems some parts of characters are not rendering
correctly. I'm bisecting to identify when and which was the first problematic
commit.

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[Bug 96435] [bisected: 3b4486] Alien: Isolation, shader problems on characters show flickering colors.

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https://bugs.freedesktop.org/show_bug.cgi?id=96435

--- Comment #3 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
Well, it seems a combination of both Mesa and kernel triggers this bug. After
trying to find a good commit (a commit that I knew was not showing this problem
earlier) yesterday, and since I was unable to find one, I thought about the
fact that I was now using a 4.7-rc2 kernel since monday. So I just went back to
kernel 4.7-rc1 and now I'm able to find a good commit. In fact, even using
commit 3b4486 works fine with an 4.7-rc1 kernel.

I'll try to bisect the kernel between 4.7-rc1 and 4.7-rc2 to see if I can find
the culprit commit on the kernel side.

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[Bug 96435] [bisected: 3b4486] Alien: Isolation, shader problems on characters show flickering colors.

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=96435

--- Comment #4 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
I'll close it for now since I'm unable to reproduce it with the original setup.
If I see it again, I'll reopen it.

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[Bug 96435] [bisected: 3b4486] Alien: Isolation, shader problems on characters show flickering colors.

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=96435

Alexandre Demers <alexandre.f.demers@gmail.com> changed:

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

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