[Bug 100697] [radeonsi,WebGL] blinking random patches instead of blinking squares

[Bug 100697] [radeonsi,WebGL] blinking random patches instead of blinking squares

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=100697

            Bug ID: 100697
           Summary: [radeonsi,WebGL] blinking random patches instead of
                    blinking squares
           Product: Mesa
           Version: git
          Hardware: Other
               URL: https://robertsspaceindustries.com/starmap
                OS: All
            Status: NEW
          Severity: minor
          Priority: low
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: kai@dev.carbon-project.org
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 130867
  --> https://bugs.freedesktop.org/attachment.cgi?id=130867&action=edit
Random blinking spots instead of squares

When viewing <https://robertsspaceindustries.com/starmap> you can see random
blinking patches (see attached screenshot) instead of full screen of blinking
squares in the background during the loading screens. The first few seconds of
<https://www.youtube.com/watch?v=Xn3MeDnryt8> show how the background should
look.
Please note, that the actual star map works fine AFAICT (thus the reduced
severity and priority).
This is with the OpenGL stack detailed below and Firefox 52.0.2. Also this
doesn't seem to be a duplicate of bug 100036 as that star map seems to render
correctly for me with the same setup.

The full stack (Debian testing as a base) is:
GPU: Hawaii PRO [Radeon R9 290] (ChipID = 0x67b1)
Mesa: Git:master/566f2ed571
libdrm: Git:master/c9c77c3717 (tag libdrm-2.4.79)
LLVM: SVN:trunk/r299977 (5.0 devel)
X.Org: 2:1.19.2-1
Linux: 4.10.9
Firmware (firmware-amd-graphics): 20161130-2
libclc: 0.2.0+git20170330-1 (rebuilt for LLVM 5.0)
DDX (xserver-xorg-video-amdgpu): 1.2.0-1+b1

Let me know if you need anything else.

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[Bug 100697] [radeonsi,WebGL] blinking random patches instead of blinking squares

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=100697

--- Comment #1 from network723@rkmail.ru ---
While I'm not a dev, but this is very similar to what I see in Xonotic, due to
llvm regression, see this bug:
https://bugs.freedesktop.org/show_bug.cgi?id=100681

If you can, try building mesa with earlier llvm revision, I myself use 299800
for now.

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[Bug 100697] [radeonsi,WebGL] blinking random patches instead of blinking squares

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https://bugs.freedesktop.org/show_bug.cgi?id=100697

--- Comment #2 from Kai <kai@dev.carbon-project.org> ---
(In reply to network723 from comment #1)
> While I'm not a dev, but this is very similar to what I see in Xonotic, due
> to llvm regression, see this bug:
> https://bugs.freedesktop.org/show_bug.cgi?id=100681
> 
> If you can, try building mesa with earlier llvm revision, I myself use
> 299800 for now.

Thanks for the pointer but I've seen this issue for quite some time with
different versions of Mesa and LLVM. Therefore I do not believe this to be
related. I just never got around to report the bug since the main part of the
map is rendering fine and the menus are working as well. It's really just the
background here.

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[Bug 100697] [radeonsi,WebGL] blinking random patches instead of blinking squares

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https://bugs.freedesktop.org/show_bug.cgi?id=100697

--- Comment #3 from Timothy Arceri <t_arceri@yahoo.com.au> ---
It seems to render incorrectly in Firefox, but renders correctly in Chrome.

The Firefox console has a number of GL_ARB_gpu_shader5 warnings like:

0:2(12): warning: extension `GL_ARB_gpu_shader5' unsupported in fragment shader


For reference it runs fine in both on i965.

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[Bug 100697] [radeonsi,WebGL] blinking random patches instead of blinking squares

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https://bugs.freedesktop.org/show_bug.cgi?id=100697

--- Comment #4 from Timothy Arceri <t_arceri@yahoo.com.au> ---
(In reply to Timothy Arceri from comment #3)
> It seems to render incorrectly in Firefox, but renders correctly in Chrome.

I meant to add that while it renders correctly the performance is really bad in
chrome.

> 
> The Firefox console has a number of GL_ARB_gpu_shader5 warnings like:
> 
> 0:2(12): warning: extension `GL_ARB_gpu_shader5' unsupported in fragment
> shader
> 
> 
> For reference it runs fine in both on i965.

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[Bug 100697] [radeonsi,WebGL] blinking random patches instead of blinking squares

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https://bugs.freedesktop.org/show_bug.cgi?id=100697

Kai <kai@dev.carbon-project.org> changed:

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

--- Comment #5 from Kai <kai@dev.carbon-project.org> ---
Ok, this is fixed now with latest Mesa and LLVM development builds. I'm seeing
the squares correctly rendered before Firefox 61 crashes. But since all
WebGL-using sites are crashing now (eg. Google Maps), this is very likely
something different.

Chromium 68 doesn't crash but still renders incorrectly for me.

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