[Bug 96239] Random "texture flickering" in Shadow of Mordor

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bugzilla-daemon＠freedesktop.org

27 May 2016 27 May '16

8:20 a.m.

https://bugs.freedesktop.org/show_bug.cgi?id=96239

Bug ID: 96239 Summary: Random "texture flickering" in Shadow of Mordor 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: 0xe2.0x9a.0x9b@gmail.com QA Contact: dri-devel@lists.freedesktop.org

Created attachment 124124 --> https://bugs.freedesktop.org/attachment.cgi?id=124124&action=edit Screenshot

See the screenshot attached to this bug.

GPU: R9 390 OpenGL version string: 4.3 (Core Profile) Mesa 11.3.0-devel (git-8314dd7)

$ export MESA_GLSL_VERSION_OVERRIDE=430

This may be related to the off-chip tessellation patches, but the issue doesn't depend on whether tessellation is enabled or disabled.

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bugzilla-daemon＠freedesktop.org

27 May 27 May

10:22 a.m.

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #1 from Jan Ziak 0xe2.0x9a.0x9b@gmail.com --- Created attachment 124125 --> https://bugs.freedesktop.org/attachment.cgi?id=124125&action=edit Tomb Raider with tessellation

Tomb Raider without tessellation: OK Tomb Raider with tessellation: random flickering

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bugzilla-daemon＠freedesktop.org

10:39 a.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

Jan Ziak 0xe2.0x9a.0x9b@gmail.com changed:

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bugzilla-daemon＠freedesktop.org

28 May 28 May

5:48 p.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

Jan Ziak 0xe2.0x9a.0x9b@gmail.com changed:

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bugzilla-daemon＠freedesktop.org

6:20 p.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #2 from prazola sostermino@yahoo.it --- I confirm the bug. It affects tessellation on heaven benchmark 4.0. r9 390.

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bugzilla-daemon＠freedesktop.org

6:22 p.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

prazola sostermino@yahoo.it changed:

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bugzilla-daemon＠freedesktop.org

6:50 p.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #3 from Clésio Luiz magolobel@yahoo.com.br --- This affect me too, in a R9 290, radeonsi driver, using padoka PPA with Kubuntu 16.04.

When you disable tesselation in those games the problem goes away.

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bugzilla-daemon＠freedesktop.org

11:52 p.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #4 from Bas Nieuwenhuizen bas@basnieuwenhuizen.nl --- Created attachment 124151 --> https://bugs.freedesktop.org/attachment.cgi?id=124151&action=edit ci-64-tess-blocks.patch

Does the attached patch help? If not I would appreciate it if someone could find the first commit that fails (using e.g. bisect).

Also, I noticed all reporters use hawaii/grenada pro chips. If anyone with a different chip also has this issue, please let me know.

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bugzilla-daemon＠freedesktop.org

29 May 29 May

2:13 a.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #5 from Rafael Castillo jrch2k10@gmail.com --- i can confirm this patches generates 0 issues on TAHITI R9-280 and CAPE VERDE HD7700, so it seems it is specific to hawaii/grenada pro

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bugzilla-daemon＠freedesktop.org

8:48 a.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #6 from Jan Ziak 0xe2.0x9a.0x9b@gmail.com --- (In reply to Bas Nieuwenhuizen from comment #4)

...

Created attachment 124151 [details] [review] ci-64-tess-blocks.patch

Does the attached patch help? If not I would appreciate it if someone could find the first commit that fails (using e.g. bisect).

Also, I noticed all reporters use hawaii/grenada pro chips. If anyone with a different chip also has this issue, please let me know.

Unfortunately, ci-64-tess-blocks.patch is making the issue more severe. The frequency of "black triangles on screen" in Tomb Raider is higher.

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bugzilla-daemon＠freedesktop.org

8:50 a.m.

New subject: [Bug 96239] [radeonsi tessellation] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #7 from Jan Ziak 0xe2.0x9a.0x9b@gmail.com --- Created attachment 124154 --> https://bugs.freedesktop.org/attachment.cgi?id=124154&action=edit Tomb Raider ci-64-tess-blocks screenshot

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bugzilla-daemon＠freedesktop.org

10:40 a.m.

New subject: [Bug 96239] [radeonsi tessellation] [R9 290/390] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

Jan Ziak 0xe2.0x9a.0x9b@gmail.com changed:

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bugzilla-daemon＠freedesktop.org

10:50 a.m.

New subject: [Bug 96239] [radeonsi tessellation] [R9 290/390] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #8 from Jan Ziak 0xe2.0x9a.0x9b@gmail.com --- (In reply to Bas Nieuwenhuizen from comment #4)

...

Does the attached patch help? If not I would appreciate it if someone could find the first commit that fails (using e.g. bisect).

Checking out for example f91c85b29b8261ab3f44d292ed2130d4f577d976 and starting Tomb Raider restarts the X server on my machine.

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bugzilla-daemon＠freedesktop.org

12:23 p.m.

New subject: [Bug 96239] [radeonsi tessellation] [R9 290/390] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #9 from Jan Ziak 0xe2.0x9a.0x9b@gmail.com --- Created attachment 124155 --> https://bugs.freedesktop.org/attachment.cgi?id=124155&action=edit S_03093C_OFFCHIP_BUFFERING(offchip_blocks) if >= CIK

This patch fixes the issue on my R9 390.

The code is just a guesswork. Maybe it should be (2*offchip_blocks-1) instead?

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bugzilla-daemon＠freedesktop.org

12:27 p.m.

New subject: [Bug 96239] [radeonsi tessellation] [R9 290/390] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #10 from Jan Ziak 0xe2.0x9a.0x9b@gmail.com --- Passing +1 to S_03093C_OFFCHIP_BUFFERING() explains why changing offchip_blocks from 256 to 64 increases the severity of the issue.

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bugzilla-daemon＠freedesktop.org

30 May 30 May

8:18 a.m.

New subject: [Bug 96239] [radeonsi tessellation] [R9 290/390] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

--- Comment #11 from Bas Nieuwenhuizen bas@basnieuwenhuizen.nl --- Thanks a lot for finding the cause of the issue.

I pushed e9d3246a7a74282fbbf95ed077e3c3b7750c8ddd to git, that patch should fix the issue.

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bugzilla-daemon＠freedesktop.org

8:28 a.m.

New subject: [Bug 96239] [radeonsi tessellation] [R9 290/390] Random "texture flickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0)

https://bugs.freedesktop.org/show_bug.cgi?id=96239

Jan Ziak 0xe2.0x9a.0x9b@gmail.com changed:

--- Comment #12 from Jan Ziak 0xe2.0x9a.0x9b@gmail.com --- Fixed. Shadow of Mordor renders OK.

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bugzilla-daemon＠freedesktop.org