[Bug 93144] [radeonsi] Alien: Isolation bug

[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

            Bug ID: 93144
           Summary: [radeonsi] Alien: Isolation bug
           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: step2back+freedesktop@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 120177
  --> https://bugs.freedesktop.org/attachment.cgi?id=120177&action=edit
Rendering bug

Menu, opening clip, opening cutscene on game engine (I guess game engine
renders it) render fine. There is bug in first gameplay. I attached screenshot
and video of it. The game is on sale before 1 december in steam. I can purchase
it as gift (one or two copies) for assigned developer.

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #1 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
Created attachment 120178
  --> https://bugs.freedesktop.org/attachment.cgi?id=120178&action=edit
Video of gameplay

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

Stepan Bakshaev <step2back+freedesktop@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #120177|text/plain                  |image/png
          mime type|                            |

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #2 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
I forget to attach important information.

OpenGL renderer string: Gallium 0.4 on AMD CAPE VERDE (DRM 2.43.0, LLVM 3.8.0)
OpenGL core profile version string: 4.1 (Core Profile) Mesa 11.2.0-devel
(padoka PPA)

mesa git151127001200.27a88a9
https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/mesa/+sourcepub/5729700/+listing-archive-extra 
llvm svn254183
https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/mesa/+sourcepub/5730044/+listing-archive-extra

packages from https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/mesa/

Linux silver 4.2.0-10-generic #12-Ubuntu SMP Tue Sep 15 19:43:01 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape
Verde XT [Radeon HD 7770/8760 / R7 250X]

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #3 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
Created attachment 120179
  --> https://bugs.freedesktop.org/attachment.cgi?id=120179&action=edit
Openning cutscene I guess it is on game engine

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #4 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
Created attachment 120180
  --> https://bugs.freedesktop.org/attachment.cgi?id=120180&action=edit
Openning cutscene I guess it is on game engine 2

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

Stepan Bakshaev <step2back+freedesktop@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #120180|text/plain                  |image/png
          mime type|                            |

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #5 from Marcus <marcus.hewat@gmail.com> ---
I confirm I have the same rendering issue, all rendering OK until the first
gameplay. During first gameplay, the body of the player seems mostly OK but the
environment flashes violently.

Running
Distribution: ubuntu 15.10
Latest Linux kernel: 4.4.0-040400rc4-generic
OpenGL renderer string: Gallium 0.4 on AMD PITCAIRN (DRM 2.43.0, LLVM 3.8.0)
OpenGL core profile version string: 4.1 (Core Profile) Mesa 11.2.0-devel
(padoka PPA)

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #6 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Could one of you record an apitrace of this behavior?

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #7 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
I will try to figure out how and do api trace on saturday.

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #8 from Daniel Scharrer <daniel@constexpr.org> ---
FYI, the game requires OpenGL 4.3 [1] (the porters have mentioned compute
shaders specifically [2]), so it *can't* work with radeonsi yet.


[1] See the Linux system requirements on
http://store.steampowered.com/app/214490/
[2] https://www.reddit.com/r/linux_gaming/comments/3t5p0r/a/cx3hn8i

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #9 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
apitrace link
https://drive.google.com/file/d/0BytXisVUnJ7QV1VONjloamZ0WWs/view?usp=sharing

mesa updated to 27d5be0b8fafecefc4f0378ca940cea8c0415715
llvm 255314

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #10 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Wait, so if the game requires OpenGL 4.3, why does it even start? Did they mess
up their version checking?

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #11 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
I used page https://www.opengl.org/wiki/Compute_Shader to find out compute
shared api calls in opengl. I searched for glDispatchCompute and
glDispatchComputeIndirect​with qapitrace. Both were not located in the
apitrace.

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #12 from Tapani Pälli <lemody@gmail.com> ---
AFAIK this game does not require compute but it does require tessellation. Game
renders much better (correct colors, vertex positions) on i965 than the
attached video but has bunch of random polygons on top of rendered image which
I believe are related to tessellation bugs on i965.

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #13 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
Please, if it valid bug report and there are other owners of radeonsi video
cards are affected change status to CONFIRMED.

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #14 from Luzipher <luziphermcleod@yahoo.ie> ---
@Stepan Bakshaev, Comment #13: Well, it's a known issue. There is a video of
the same effects on youtube ( https://www.youtube.com/watch?v=n35hwmN3VmQ )
that was made shortly after the release. Also the developers said multiple
times it'd need OpenGL 4.3 and especially compute shaders - check Comment #8 or
the posts by Feral employees on the steam forum (for example post 32 from
[FERAL] Edwin here:
http://steamcommunity.com/app/214490/discussions/0/490123938446209677/#p3 ). I
don't think it's a bug if the game wants 4.3 and we only got 4.1, and I trust
the devs if they say it needs compute shaders. Of course it's a bit strange
that it looked better on i965 before they had compute shaders, according to
Tapani Pälli in Comment #12.

@Nicolai Hähnle, Comment #10: well, it fires up a dialog that the graphics
driver isn't supported and asks you if you want to continue anyway. I think I
didn't get that dialog when I forced mesa to 4.3 (it doesn't help). I actually
think it's not a bad idea to let the user decide.

To add some not-yet-mentioned info: the effect you see depends on the setting
for SSAO (Screen Space Ambient Occlusion). If you set it to "Off" or "Standard"
you'll get the flickery colours everywhere. If you set it to "HDAO" it's way
less flickery (fog still does), but way too dark. Maybe that's a hint why
radeonsi is different compared to i965 ?

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #15 from Luzipher <luziphermcleod@yahoo.ie> ---
Created attachment 120771
  --> https://bugs.freedesktop.org/attachment.cgi?id=120771&action=edit
SSAO set to HDAO (less flickery, too dark)

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[Bug 93144] [radeonsi] Alien: Isolation bug

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #16 from Tapani Pälli <lemody@gmail.com> ---
(In reply to Luzipher from comment #14)
> @Stepan Bakshaev, Comment #13: Well, it's a known issue. There is a video of
> the same effects on youtube ( https://www.youtube.com/watch?v=n35hwmN3VmQ )
> that was made shortly after the release. Also the developers said multiple
> times it'd need OpenGL 4.3 and especially compute shaders - check Comment #8
> or the posts by Feral employees on the steam forum (for example post 32 from
> [FERAL] Edwin here:
> http://steamcommunity.com/app/214490/discussions/0/490123938446209677/#p3 ).
> I don't think it's a bug if the game wants 4.3 and we only got 4.1, and I
> trust the devs if they say it needs compute shaders. Of course it's a bit
> strange that it looked better on i965 before they had compute shaders,
> according to Tapani Pälli in Comment #12.

Yep, I was just guessing there since we did not have compute in extension
string at that time .. *but* we did have most of implementation so it is
possible that game engine just queried the functions and started using it. When
I have time I'll test this again since now we have both compute and
tessellation support in place for i965.

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[Bug 93144] [radeonsi] Alien: Isolation feature request

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

Stepan Bakshaev <step2back+freedesktop@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[radeonsi] Alien: Isolation |[radeonsi] Alien: Isolation
                   |bug                         |feature request

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[Bug 93144] [radeonsi] Alien: Isolation feature request

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #17 from Darius Spitznagel <d.spitznagel@goodbytez.de> ---
I tested this game with my Iris Pro 5200 (i965) and mesa master as
GL_ARB_compute_shader for Intel is ready there.

But the game quits right before the 20th Century Fox video should play.
When I disable compute_shader (MESA_EXTENSION_OVERRIDE=-GL_ARB_compute_shader)
I can get into the game but all I see are the legs from Ripley, the rest is
totally dark. Switching SSAO doesn't help.

I also did an apitrace with disabled compute_shader and can confirm, that the
game requests compute_shader right before the start of the 20th Century Fox
video.

@Tapani: Did you had time to look into this in the meantime?
Maybe the game also needs GL_ARB_stencil_texturing which is ready for Intel
gen8 GPUs but not gen7 (like mine).
I say this because Shadow of Mordor also uses compute_shader but this games
works great on Intel gen7 and mesa master.

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #18 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
I would suggest to create a different bug for Intel's driver and then to add a
"See Also" between both bugs. My suggestion comes from the fact that Intel
users and Radeon users seem to have not exactly the visual problem and also
because some OpenGL extensions are present in one but not in the other.

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #19 from Darius Spitznagel <d.spitznagel@goodbytez.de> ---
(In reply to Alexandre Demers from comment #18)
> I would suggest to create a different bug for Intel's driver and then to add
> a "See Also" between both bugs. My suggestion comes from the fact that Intel
> users and Radeon users seem to have not exactly the visual problem and also
> because some OpenGL extensions are present in one but not in the other.

You are right, sorry.
For Intel see also: https://bugs.freedesktop.org/show_bug.cgi?id=93840

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[Bug 93144] [radeonsi] Alien: Isolation feature request

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https://bugs.freedesktop.org/show_bug.cgi?id=93144

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=93840

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--- Comment #20 from Marek Olšák <maraeo@gmail.com> ---
Why is this bug called "feature request"?

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--- Comment #21 from Luzipher <luziphermcleod@yahoo.ie> ---
(In reply to Marek Olšák from comment #20)
> Why is this bug called "feature request"?

I guess the feature requested is compute shaders ;-) Or GL 4.3 of course, if
you prefer.

To clarify: the game wants GL 4.3 and the game devs said it'd require compute
shaders - yet it runs on radeonsi (GL 4.1), but with heavy psychedelic
flickering (see attachements).

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--- Comment #22 from darkbasic <darkbasic@linuxsystems.it> ---
Any idea why it doesn't still run even with the compute shader patches? (I
didn't test it, that's what I read)

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--- Comment #23 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
(In reply to darkbasic from comment #22)
> Any idea why it doesn't still run even with the compute shader patches? (I
> didn't test it, that's what I read)

You may be a bit too fast. First, the patches haven't been merged in mesa yet
to my knowledge. Secondly, it also needs a patched LLVM, which is also not yet
included yet.

However, if you apply both sets of patches, who knows. Where did you read about
it not working yet?

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--- Comment #24 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
Ok, I saw the comment in Phoronix' forum. I suspect the extension to still be
disabled in his case. I'll wait for the patches to be officially merged in mesa
and LLVM.

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--- Comment #25 from almos <aaalmosss@gmail.com> ---
I took a look at the trace in comment 9, and it doesn't try to use compute
shader AFACT. I tried to run the trace with catalyst, but glretrace immediately
exits with error (I think catalyst doesn't support the visual radeonsi used
when recording the trace).

I think the cutscene screenshots can be removed, the intro is a prerendered
video.

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--- Comment #26 from Christoph Haag <haagch@frickel.club> ---
(In reply to Alexandre Demers from comment #24)
> Ok, I saw the comment in Phoronix' forum. I suspect the extension to still
> be disabled in his case.

glxinfo says opengl 4.2 and that the compute shader extension is there.

I tried making an apitrace, but it turned out to be 6.1 gigabyte, so I'm not
uploading that if there's no real need.

I don't know terribly much about shaders, but if I see
68300 @1 glCreateShader(type = GL_COMPUTE_SHADER) = 3085
68301 @1 glShaderSource(shader = 3085, count = 1, string = ["#version 420 core
etc...
68302 @1 glCompileShader(shader = 3085)
in apitrace, doesn't that mean it successfully uses compute shaders?

Mesa: User error: GL_INVALID_OPERATION in unsupported function called
(unsupported extension or deprecated function?)

But the skeptical approach might be the right one, that my first test didn't
actually test it with compute shaders.

I tried it with MESA_GL_VERSION_OVERRIDE=4.3fc MESA_GLSL_VERSION_OVERRIDE=430fc
to see whether the game would do something different - and if I'm not
completely blind it does look a lot better beyond the colorful flickering,
doesn't it?

New Video: https://www.youtube.com/watch?v=ueoELXXduvk

It did say once on startup:
  Mesa: User error: GL_INVALID_OPERATION in unsupported function called
(unsupported extension or deprecated function?)
so there's possibly still something missing. (would be nice for mesa to
actually print what the "unsupported function" is)

Anyway, not investigating further right now because I want to go to sleep
before 3 AM.

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--- Comment #27 from Christoph Haag <haagch@frickel.club> ---
Double post, but it wasn't so clear in this thread up to now: The game will
only really use compute shaders when OpenGL is 4.3, not when it is 4.2.

With the mesa override to version 4.3 I can find calls like
604839 @3 glDispatchCompute(num_groups_x = 256, num_groups_y = 1, num_groups_z
= 1)
in the apitrace, without the override I do not see those.

So here is an apitrace with 4.3fc override:
http://haagch.frickel.club/files/AlienIsolation.trace.xz
(1.3 Gigabyte download)

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--- Comment #28 from hadack@gmx.de ---
The game runs fine for me with 
MESA_GL_VERSION_OVERRIDE=4.3 MESA_GLSL_VERSION_OVERRIDE=430

I have already played a few hours on the branches from Bas.
Its looking great, and is quite playable on my 7750 :-)

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--- Comment #29 from Christoph Haag <haagch@frickel.club> ---
That's interesting. I played a bit with the settings and the color flicker
never went away.

Did you build the compute shader branch directly? I merged it into mesa
master...

Can you replay my apitrace? Sorry, it takes a while, but at the end, do you see
the colors flickering?

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almos <aaalmosss@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aaalmosss@gmail.com

--- Comment #30 from almos <aaalmosss@gmail.com> ---
(In reply to hadack from comment #28)
> The game runs fine for me with 
> MESA_GL_VERSION_OVERRIDE=4.3 MESA_GLSL_VERSION_OVERRIDE=430
> 
> I have already played a few hours on the branches from Bas.
> Its looking great, and is quite playable on my 7750 :-)

So the issue was that the game uses a fallback if 4.3 is not available, and
that fallback rendering path is buggy?

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--- Comment #31 from Edwin Smith <esmith@feralinteractive.com> ---
There is no fallback path on Alien Isolation. If you don't have compute then
the entire lighting pass will fail. 

What you see if compute is missing is other parts of the render that don't use
compute trying to draw with missing and junk data due to the missing compute
sections giving you the acid trip effect you see in the screenshots.

If any engineers are working on compute please do contact me and we can look at
providing keys to valid requests. :-)

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--- Comment #32 from Christoph Haag <haagch@frickel.club> ---
You can ignore my comment 27 and comment 29.

For some reason with the first compute shader patchset the compute shaders
would compile fine but not *really* work, at least for me - but for others they
did.

Now with v2 they work for me too - mostly. In some small areas there still
appears to be some colorful flickering. Here's how it looks now:
https://www.youtube.com/watch?v=T9eAcYthPOc

Where I see some colors that I think shouldn't be there: very briefly at 2:36
and 2:38, from 2:50 ongoing the door and some short flickers on the whole room,
then 3:20 the same door, and lastly from 6:20 ongoing that room. But it's no
comparison to before..

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--- Comment #33 from Stepan Bakshaev <step2back+freedesktop@gmail.com> ---
@Christoph Haag,

You wrote about patches to mesa. What is about llvm patches? Did you apply? Was
it upsteam?

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--- Comment #34 from Christoph Haag <haagch@frickel.club> ---
(In reply to Stepan Bakshaev from comment #33)
> @Christoph Haag,
> 
> You wrote about patches to mesa. What is about llvm patches? Did you apply?
> Was it upsteam?

This one is upstream I assume: http://reviews.llvm.org/D18559

So I only applied the diff from http://reviews.llvm.org/D18340 to llvm-svn
266255.

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Luzipher <luziphermcleod@yahoo.ie> changed:

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

--- Comment #35 from Luzipher <luziphermcleod@yahoo.ie> ---
Today, since compute shaders are committed to the mesa repo (commit    
7143068296aaca8c5af3469c013a7c2a850aee84) and the llvm repo this game runs
flawlessly with nothing but "MESA_GL_VERSION_OVERRIDE=4.3
MESA_GLSL_VERSION_OVERRIDE=430" (which isn't enabled yet due to some bug that
doesn't affect Alien Isolation). I didn't see any flickery colours on fog or
anywhere else during the first level (on the Torrens).

Setting this bug to resolved. Thanks for getting it working, devs ! :-)

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--- Comment #36 from Christoph Haag <haagch@frickel.club> ---
For me it's still only almost.

Here is another video I recorded:
https://youtu.be/RDO0MeZAvms?t=321

This time all doors and rooms were fine, but the characters were not.

Hardware:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Wimbledon XT [Radeon HD 7970M] (rev ff)

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--- Comment #37 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Can you open a new bug report for this and provide an apitrace?

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--- Comment #38 from Christoph Haag <haagch@frickel.club> ---
(In reply to Nicolai Hähnle from comment #37)
> Can you open a new bug report for this and provide an apitrace?

To tie up this loose end: I put it off because this would have been a massive
apitrace with walking to that room etc.

I first made a video of how it had become even worse with the NPCs being
completely black/white and how it was this way with high and with low settings:
https://youtu.be/Hk9VrJ99jcc?t=110

After restarting the game, I can not reproduce it anymore, not even with the
exact same settings I had previously in the video. I can see neither the
blue/red lighting problem nor the black/white problem anymore and everything
seems to render fine now.

My guess is that it wasn't a driver problem in the first place and that it was
caused by the game itself caching something and invalidating it after changing
the settings and restarting the game.

So if anyone has a similar problem: Try changing *all* graphics settings and
restarting the game.

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