[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

            Bug ID: 93292
           Summary: "Thea: The Awakening" world map textures not rendered
                    (blue background)
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: glogow@fbihome.de
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 120410
  --> https://bugs.freedesktop.org/attachment.cgi?id=120410&action=edit
Thea with interface only world map

The problematic game can be downloaded from the link in the first message in
the following steam thread or via the steam beta channel (DRM free, free for
Linux):
https://steamcommunity.com/app/378720/discussions/0/490125737485986607?fp=2#p1

Someone else with older AMD hardware reported the same problem in the linked
communty thread. My hardware is:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
RV710/M92 [Mobility Radeon HD 4530/4570/545v]

When starting the actual gameplay, only the interface is rendered but not the
games world map, basically rendering the game unplayable (see attached image).

I'm on Ubuntu Trusty 14.04, 3.13 kernel. This happens with stock Mesa from the
Ubuntu release and with the git release from the oibaf PPA:
https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers

The apitrace is too large to upload for me (1.5 GB), but doesn't show a
particular error, except for an early glClear without a context; even the
trimmed one is 1,25GB. xz compressed is still 620MB.

The game renders correctly when started with "LIBGL_ALWAYS_SOFTWARE=1". I
confirmed this by also rendering the apitrace in software. imirkin told me on
IRC, that this actually is a bug in the r600 driver.

I've compiled Mesa git packages with "--enable-debug" and can test a patch, if
needed. I'm jmux on freenode and will be lingering around in the channel for
some time and normally can be found in the libreoffice-dev channel.

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #1 from Jan-Marek Glogowski <glogow@fbihome.de> ---
I added an trimmed apitrace run for download:
https://docs.google.com/uc?id=0Bwde9zQo1PeCVEExTm83Wk16WDA&export=download

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

Ilia Mirkin <imirkin@alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #120410|text/plain                  |image/png
          mime type|                            |

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #2 from Ilia Mirkin <imirkin@alum.mit.edu> ---
In case it's of any interest, I tested this on nouveau -- on nvc0 (GF108) the
trace replays seemingly fine. On nv50 (GT215), I also get a failure on the map
screen, but it's different -- everything is drawn except the background, so it
appears as though it's all black(ish), with trees/etc drawn over it.

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #3 from Jan-Marek Glogowski <glogow@fbihome.de> ---
(In reply to Ilia Mirkin from comment #2)
> In case it's of any interest, I tested this on nouveau -- on nvc0 (GF108)
> the trace replays seemingly fine. On nv50 (GT215), I also get a failure on
> the map screen, but it's different -- everything is drawn except the
> background, so it appears as though it's all black(ish), with trees/etc
> drawn over it.

The current bugs component is tagged Drivers/Gallium/r600

Probably you should open a new bug for nv50 or change the component, otherwise
it'll probably be unnoticed. I'm actually not sure if the component is right,
as I expected it to be reported to the mesa-dev mailing list.

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #4 from Jan-Marek Glogowski <glogow@fbihome.de> ---
I uploaded a new apitrace with low details settings and disabled intro video,
which makes it much smaller (170 MB xz).

https://docs.google.com/uc?id=0Bwde9zQo1PeCVVdZU2ZSM3hKcXc&export=download

While I was at it I played a bit with qapitrace, comparing the r600 and swrast
output. And I found the origin of the bug.

The "breaking" call is "1247216" in the new trace:
  glDrawElements(mode = GL_TRIANGLES, count = 600, type = GL_UNSIGNED_SHORT,
indices = NULL)

The call "destroys" the depth map, filling it with a constant value, so nothing
is rendered.

Actually I suspect the glUseProgram(87) in call 1247202 to be the origin of the
problem, as it installs a shader program (AFAIK OpenGL) and because I'm able to
play Thea using the llvm r600 backend via "R600_DEBUG=llvm" and if I disable
"ambient occlusion", which is also broken.

My current mesa build is based on commit
6303231a1ddf646b05c43c6bbc7fa71314ebb3fc

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #5 from Jan-Marek Glogowski <glogow@fbihome.de> ---
Created attachment 121137
  --> https://bugs.freedesktop.org/attachment.cgi?id=121137&action=edit
Additional debugging for the r600/sb shader compiler

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #6 from Jan-Marek Glogowski <glogow@fbihome.de> ---
Created attachment 121138
  --> https://bugs.freedesktop.org/attachment.cgi?id=121138&action=edit
Shader with peephole optimize_CNDcc_op run

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #7 from Jan-Marek Glogowski <glogow@fbihome.de> ---
Created attachment 121139
  --> https://bugs.freedesktop.org/attachment.cgi?id=121139&action=edit
Shader without peephole optimize_CNDcc_op run

Working shader

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #8 from Jan-Marek Glogowski <glogow@fbihome.de> ---
working command line with patch to get the shader log:
  R600_SB_DSKIP_START=94 R600_SB_DSKIP_END=94 R600_SB_DSKIP_MODE=63 glretrace
thea.trace

working command line without the patch to verify shader bug:
  R600_SB_DSKIP_START=94 R600_SB_DSKIP_END=94 R600_SB_DSKIP_MODE=1 glretrace
thea.trace

In the end I'm just using the llvm backend (R600_DEBUG=llvm). I just see a
minimal difference on this HW in game of ~0.5 frames (slower LLVM). Actually I
had other small rendering glitches with the SB shader backend, which I didn't
track down.

(In reply to Ilia Mirkin from comment #2)
> In case it's of any interest, I tested this on nouveau -- on nvc0 (GF108)
> the trace replays seemingly fine. On nv50 (GT215), I also get a failure on
> the map screen, but it's different -- everything is drawn except the
> background, so it appears as though it's all black(ish), with trees/etc
> drawn over it.

The original (large) apitrace had ambient occlusion (AO) activated AFAIK, but I
deleted it, so I don't know. AO was fixed for me with a patch in the last week.
As my hardware is already slow (just 15fps in the game), enabling this renders
the game unplayable, but now I get soft shadows at the price of ~50% frame
drop.

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[Bug 93292] "Thea: The Awakening" world map textures not rendered (blue background)

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https://bugs.freedesktop.org/show_bug.cgi?id=93292

--- Comment #9 from Grazvydas Ignotas <notasas@gmail.com> ---
(In reply to Jan-Marek Glogowski from comment #4)
> I uploaded a new apitrace with low details settings and disabled intro
> video, which makes it much smaller (170 MB xz).
> 
> https://docs.google.com/uc?id=0Bwde9zQo1PeCVVdZU2ZSM3hKcXc&export=download
> 

FWIW this trace works fine for me on my Juniper XT [Radeon HD 5770] on current
git (cd9c07e7cdf) with default settings. R600_DEBUG=llvm crashes,
R600_DEBUG=llvm,nosb shows some glitches and R600_DEBUG=nosb seems to be fine
too. The other trace does a 404 now so can't check.

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

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

--- Comment #10 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/561.

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