Nouveau - Sep 2015 - [Bug 91986] New: Artifacts in models rendering with GeForce 6150 (NV4x chipsets)

https://bugs.freedesktop.org/show_bug.cgi?id=91986

            Bug ID: 91986
           Summary: Artifacts in models rendering with GeForce 6150 (NV4x
                    chipsets)
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: issor.oruam at gmail.com
        QA Contact: nouveau at lists.freedesktop.org

Created attachment 118224
  --> https://bugs.freedesktop.org/attachment.cgi?id=118224&action=edit
X-Wing model artifacts visible on with mesa 11.1git

X-Wing model and other models in FreeSpace2 with StarWars Original Trilogy mod
shows rendering artifacts.

Filing a separate bug from https://bugs.freedesktop.org/show_bug.cgi?id=91551
as requested for NV4C chipset,
also because the artifacts are different.

Here I see big black poligons filling the screen, like vertexes of the model
invading the whole screen. 

NOTE: using mesa 10.6 the artifacts are not covering the entire GUI,
but I see some kind of vertex/surfaces problem, but the shaders maps are fine
but the vertexes/surfaces are completely distorted.

Here is the link of the old trace that is able to produce the artifacs
described in the different mesa versions. (X-Wing is the model visible before
the Tie pilot)

http://www.mediafire.com/download/949r35rra31rpte/Tie_pilot_Nvidia_GT210_fs2_open_3.7.2.trace.7z

Attached pictures of the artifact for 11.1git and 10.6

Attached dmesg that show some nouveau errors, but most probably unrelated to
the bug.

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--- Comment #1 from Mauro Rossi <issor.oruam at gmail.com> ---
Created attachment 118225
  --> https://bugs.freedesktop.org/attachment.cgi?id=118225&action=edit
X-Wing model artifacts visible on with mesa 10.6.5

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--- Comment #2 from Mauro Rossi <issor.oruam at gmail.com> ---
Created attachment 118226
  --> https://bugs.freedesktop.org/attachment.cgi?id=118226&action=edit
Kernel log

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https://bugs.freedesktop.org/show_bug.cgi?id=91986

Marcin Slusarz <marcin.slusarz at gmail.com> changed:

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Marcin Slusarz <marcin.slusarz at gmail.com> changed:

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--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
A small number of nv4x fixes did go into mesa 11, would be nice to know what
affected the change between 10.6 and git.

May be interesting to know if this magically starts working with
NV30_SWTNL=true in the environment (which will force vertex shaders to execute
on the CPU).

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--- Comment #4 from Mauro Rossi <issor.oruam at gmail.com> ---
Hi Ilia,

tested with NV30_SWTNL=true 

With both mesa 11.1git (oibaf ppa) and 10.6.5 (xorg-edgers ppa) the problems
disappears

As a side note, with NV30_SWTNL=true I see minor side effects on all models,
including the ones that were perfect (Tie Pilot, Tie Fighter), like missing
translucency and normal maps have been disabled.

Just my curiosity, are these side effects to be expected when using 
NV30_SWTNL=true ?

Mauro

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--- Comment #5 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Mauro Rossi from comment #4)
> Just my curiosity, are these side effects to be expected when using 
> NV30_SWTNL=true ?
Strictly speaking, swtnl should work identically to hwtnl. However until
recently, the swtnl path was *totally* broken. I fixed it up, but I wouldn't
exclude the possibility of some remaining fail that I didn't notice.

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--- Comment #6 from Mauro Rossi <issor.oruam at gmail.com>
---
>Strictly speaking, swtnl should work identically to hwtnl. However until
>recently, the swtnl path was *totally* broken. I fixed it up, but I
wouldn't >exclude the possibility of some remaining fail that I
didn't notice.
Hi, thanks Ilia, my question was to check the expected behavior in that case. 

Do you recommed to open a different bug?

I have collected a trace of Millenium Falcon model particularly showing the
opaqueness/missing translucency with NV4x.

Mauro

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

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

--- Comment #7 from GitLab Migration User <gitlab-migration at
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-- 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/1083.

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