[Bug 108641] Interlaced dark lines in XCOM2 (UE3.5) on Aruba and Turks

[Bug 108641] Interlaced dark lines in XCOM2 (UE3.5) on Aruba and Turks

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

            Bug ID: 108641
           Summary: Interlaced dark lines in XCOM2 (UE3.5) on Aruba and
                    Turks
           Product: Mesa
           Version: 18.2
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: steelwinged@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 142355
  --> https://bugs.freedesktop.org/attachment.cgi?id=142355&action=edit
in-game screenshot

Game engine rendering outputs are interlaced with dark lines on r600.

Tested on: 7660G (Aruba) and 7670M (Turks) with Mesa 18.2.4.
Renderdoc captures have been uploaded here:
https://www32.zippyshare.com/v/G74cEAp5/file.html

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[Bug 108641] Interlaced dark lines in XCOM2 (UE3.5) on Aruba and Turks

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

--- Comment #1 from steelwinged@gmail.com ---
If it's of any help, I have managed to narrow down the first output appearance
of these interlacing lines between events glDispatchCompute(80, 45, 1) and
second call of glDrawElementsBaseVertex(48).

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[Bug 108641] Interlaced dark lines in XCOM2 (UE3.5) on Aruba and Turks

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

--- Comment #2 from steelwinged@gmail.com ---
Refreshing the upload due to the link expiring:
https://www38.zippyshare.com/v/d0oWhmbR/file.html

Just a remark, the capture was taken with RenderDoc 1.1 and the bug still
occurs on Mesa 18.3.1.

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[Bug 108641] Interlaced dark lines in XCOM2 (UE3.5) on Aruba and Turks

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

--- Comment #3 from steelwinged@gmail.com ---
Situation still occurs on Mesa 19.1.3, refreshed RenderDoc capture at
https://www47.zippyshare.com/v/fL6gXv7u/file.html

I might be conflating things, but there's also a shader scheduling error:

##post_scheduler: unscheduled pending instructions :MOV     R27.x.5@R1.w,   
R17.x.1@R1.x
MOV     R27.x.3@R1.y,    R17.w.1@R0.z
MOV     R17.x.1@R1.x,    A9.y[R16.x.1@R0.w]_73F@R1.y
                                            rels: A9.y[R16.x.1@R0.w]_73F@R1.y :
 <= R9.y.1F, R10.y.1F, R11.y.1F, R12.y.1F, R13.y.1F, R14.y.1F
MOV     R17.w.1@R0.z,    A9.x[R16.x.1@R0.w]_62F@R1.x
                                            rels: A9.x[R16.x.1@R0.w]_62F@R1.x :
 <= R9.x.1F, R10.x.1F, R11.x.1F, R12.x.1F, R13.x.1F, R14.x.1F
MOV     R14.y.1F,    4.2039e-45|00000003
MOV     R13.y.1F,    4.2039e-45|00000003
MOV     R12.y.1F,    7.00649e-45|00000005
MOV     R11.y.1F,    5.60519e-45|00000004
MOV     R10.y.1F,    4.2039e-45|00000003
MOV     R9.y.1F,    4.2039e-45|00000003
FLT_TO_UINT     R16.x.1@R0.w,    C4102.x
MOV     R14.x.1F,    1.4013e-45|00000001
MOV     R13.x.1F,    0|00000000
MOV     R12.x.1F,    0|00000000
MOV     R11.x.1F,    0|00000000
MOV     R10.x.1F,    5.60519e-45|00000004
MOV     R9.x.1F,    7.00649e-45|00000005

I don't read mnemonics, but I'm guessing that could be "Shader 9120" from the
capture, which also causes the interlacing lines. I'm attaching it shortly.

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[Bug 108641] Interlaced dark lines in XCOM2 (UE3.5) on Aruba and Turks

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

--- Comment #4 from steelwinged@gmail.com ---
Created attachment 144946
  --> https://bugs.freedesktop.org/attachment.cgi?id=144946&action=edit
Shader suspected of causing defect

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[Bug 108641] Interlaced dark lines in XCOM2 (UE3.5) on Aruba and Turks

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

steelwinged@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|18.2                        |19.1

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[Bug 108641] Interlaced dark lines in XCOM2 (UE3.5) on Aruba and Turks

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

--- Comment #5 from steelwinged@gmail.com ---
Can confirm that the program with the attached compute shader is producing
these lines, compared to nvidia.

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[Bug 108641] Shader causes Interlaced dark lines on R600g in XCOM2

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

steelwinged@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Interlaced dark lines in    |Shader causes Interlaced
                   |XCOM2 (UE3.5) on Aruba and  |dark lines on R600g in
                   |Turks                       |XCOM2

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[Bug 108641] Shader causes Interlaced dark lines on R600g in XCOM2

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https://bugs.freedesktop.org/show_bug.cgi?id=108641

GitLab Migration User <gitlab-migration@fdo.invalid> changed:

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

--- Comment #6 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- 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/648.

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