[Bf-committers] I can't use Opensubdiv on 2.79 RC1 with an AMD RX 480 (Linux)

[Sergey Sharybin]

Brecht, AMDGPU is an opensource driver implementation from AMD. It is NOT
directly used by system and/or applications, instead it is hooked up to
Mesa via LLVMPipe. So as far as applications are concerned, their OpenGL
provider is Mesa.

The issue here is that driver developers doesn't seem to be into
implementing all OpenGL features within compatibility profile. Core profile
on AMDGPU goes up to 4.5 if i'm remembering things correctly.

On Tue, Aug 8, 2017 at 12:18 AM, Brecht Van Lommel <
brechtvanlommel at pandora.be> wrote:

> I think in this specific case the driver is not installed or configured
> correctly. The system info shows it's not using the AMDGPU driver for
> OpenGL, but Mesa. The RX 480 is certainly new enough to support OpenSubdiv.
>
> On Mon, Aug 7, 2017 at 11:26 PM, Sergey Sharybin <sergey.vfx at gmail.com>
> wrote:
>
> > Blender requires decent OpenGL for drawing OpenSubdiv meshes. This is the
> > only way to get decent speedups.
> >
> > But it's not all that sad as it sounds! In Blender 2.8 we've switched to
> > OpenGL core profile, which has higher OpenGL support than the
> compatibility
> > profile we use in 2.78/2.79. Unfortunately, we did not hook up OpenSubdiv
> > in 2.8 branch yet.
> >
> > So with 2.8 OpenSubdiv support will come to more hardware (including
> Apple
> > macOS) with more features (like adaptive subdivisions).
> >
> > On Mon, Aug 7, 2017 at 11:11 PM, Jefferson Rausseo <
> > jeffersonrausseo at gmail.com> wrote:
> >
> > > Is it possible to use Opensubdiv with CPU only? For example with
> OpenMP.
> > >
> > > 2017-08-07 12:24 GMT-04:00 Sergey Sharybin <sergey.vfx at gmail.com>:
> > >
> > > > Thanks for the file. This clarifies a lots.
> > > >
> > > > Your driver only provides OpenGL 3.0, for which we need the following
> > > > extensions:
> > > >
> > > > - uniform_buffer_object
> > > > - geometry_shader4
> > > > - texture_buffer_object
> > > >
> > > > The latter two are not supported by the driver you're using (you can
> > see
> > > > that in the `extensions` section of the system-info).
> > > >
> > > >
> > > > On Mon, Aug 7, 2017 at 5:46 PM, Jefferson Rausseo <
> > > > jeffersonrausseo at gmail.com> wrote:
> > > >
> > > > > system-info.txt:
> > > > > http://www.pasteall.org/501754/text
> > > > >
> > > > > 2017-08-07 11:38 GMT-04:00 Sergey Sharybin <sergey.vfx at gmail.com>:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > Please show your system-info.txt generated via Help -> Save
> System
> > > Info
> > > > > > (use hastebin.com or pasteall.org, that file will be quite
> long).
> > > > > >
> > > > > > On Mon, Aug 7, 2017 at 4:25 PM, Jefferson Rausseo <
> > > > > > jeffersonrausseo at gmail.com> wrote:
> > > > > >
> > > > > > > Hi,
> > > > > > >
> > > > > > > I am a Blender user and I have some problems to use Opensubdiv
> > with
> > > > my
> > > > > > AMD
> > > > > > > RX 480:
> > > > > > >
> > > > > > > My computer:
> > > > > > > Linux: Manjaro 64bits 17.0
> > > > > > > Kernel: 4.12
> > > > > > > GPU: AMD RX 480 8Gb
> > > > > > > CPU: Ryzen 5 1600
> > > > > > > Driver: amdgpu (Free) + opencl-amd (not free)
> > > > > > >
> > > > > > > Blender: 2.79 RC1 Official build
> > > > > > >
> > > > > > > Screenshot:
> > > > > > > https://pasteboard.co/GEyDD10.png
> > > > > > >
> > > > > > > Do I need to install some package depends?
> > > > > > > _______________________________________________
> > > > > > > Bf-committers mailing list
> > > > > > > Bf-committers at blender.org
> > > > > > > https://lists.blender.org/mailman/listinfo/bf-committers
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > > With best regards, Sergey Sharybin
> > > > > > _______________________________________________
> > > > > > Bf-committers mailing list
> > > > > > Bf-committers at blender.org
> > > > > > https://lists.blender.org/mailman/listinfo/bf-committers
> > > > > >
> > > > > _______________________________________________
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> > > > > Bf-committers at blender.org
> > > > > https://lists.blender.org/mailman/listinfo/bf-committers
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > With best regards, Sergey Sharybin
> > > > _______________________________________________
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> > > > Bf-committers at blender.org
> > > > https://lists.blender.org/mailman/listinfo/bf-committers
> > > >
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> > >
> >
> >
> >
> > --
> > With best regards, Sergey Sharybin
> > _______________________________________________
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> > Bf-committers at blender.org
> > https://lists.blender.org/mailman/listinfo/bf-committers
> >
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-- 
With best regards, Sergey Sharybin