Only "None" OpenSubDiv option in preferences to choose from #45717

New Issue

first last · 2015-08-07T07:46:13+02:00

first last commented

2015-08-07 07:46:13 +02:00

System Information
Linux X64, HD5770, OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.3.2 but Blender system info reports only OpenGL 3.0

Blender Version
Broken: 2.75-44384c6

Short description of error
I don't know if GLSL backends are using something higher than OGL3.3 but there should be atleast CPU and OpenMP backends to choose from.

**System Information** Linux X64, HD5770, OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.3.2 but Blender system info reports only OpenGL 3.0 **Blender Version** Broken: 2.75-44384c6 **Short description of error** I don't know if GLSL backends are using something higher than OGL3.3 but there should be atleast CPU and OpenMP backends to choose from.

first last commented

2015-08-07 07:46:13 +02:00

Changed status to: 'Open'

first last commented

2015-08-07 07:46:13 +02:00

Added subscriber: @StasSidorenko

Aaron Carlisle commented

2015-08-07 16:22:41 +02:00

Added subscriber: @Blendify

Sergey Sharybin was assigned by Aaron Carlisle

2015-08-07 16:22:41 +02:00

Aaron Carlisle commented

2015-08-07 16:22:41 +02:00

OpenSubdiv uses OpenGL 4 so that might be why. But Sergey know more then I

Julian Eisel commented

2015-08-07 19:07:24 +02:00

Added subscriber: @JulianEisel

Julian Eisel commented

2015-08-07 19:07:24 +02:00

@Blendify, It should be still be possible to choose CPU or OpenMP.

Lets wait on Sergey to investigate.

@Blendify, It should be still be possible to choose CPU or OpenMP. Lets wait on Sergey to investigate.

Riccardo Giovanetti commented

2015-08-07 19:11:28 +02:00

Added subscriber: @Harvester

Riccardo Giovanetti commented

2015-08-07 19:11:28 +02:00

Here, on Windows 7 Pro 64bit, these are the options available in the OpenSubdiv Compute Type's drop-down menu in Preferences | System for the current Windows 64bit build Hash:44384c6 (by default it's set to None):

Here, on Windows 7 Pro 64bit, these are the options available in the OpenSubdiv Compute Type's drop-down menu in Preferences | System for the current Windows 64bit build Hash:44384c6 (by default it's set to None): ![T45717_OSD_ComputeOptions_Win7_64bit_Hash_44384c6.png](https://archive.blender.org/developer/F221416/T45717_OSD_ComputeOptions_Win7_64bit_Hash_44384c6.png)

Aaron Carlisle commented

2015-08-07 19:18:57 +02:00

I dont have GLSL Transform Feedback

first last commented

2015-08-07 20:23:21 +02:00

In #45717#326865, @Harvester wrote:

I don't have this list even though in my understanding atleast CPU and OpenMP should be there. You're using Windows and 100% proprietary drivers. For my case(OpenCL probably won't work on pre GCN cards) under Linux there is no point using those as i've tested some time ago, i get overall better experience with OSS ones and performance in Blender is roughly the same. Also i don't understand what does it have to with CPU backends, hopefully its a simple bug.

> In #45717#326865, @Harvester wrote: I don't have this list even though in my understanding atleast CPU and OpenMP should be there. You're using Windows and 100% proprietary drivers. For my case(OpenCL probably won't work on pre GCN cards) under Linux there is no point using those as i've tested some time ago, i get overall better experience with OSS ones and performance in Blender is roughly the same. Also i don't understand what does it have to with CPU backends, hopefully its a simple bug.

Bastien Montagne commented

2015-08-07 23:51:15 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2015-08-07 23:51:15 +02:00

I can confirm here that with my default intel 'GPU' and free driver, I have no choice at all in the OSD compute type menu. Once I launch Blender on my nividia GPU (with primusrun), all choices become available…

Aaron Carlisle commented

2015-08-08 03:01:14 +02:00

Even I have coices for Intel card I have 4600

Wolfgang Faehnle commented

2015-08-08 06:51:13 +02:00

Added subscriber: @mib2berlin

Wolfgang Faehnle commented

2015-08-08 06:51:13 +02:00

Hi, can reproduce on Elementry Freya 64 with Mesa 3.0.
Intel HD 4400.

system-info.txt

Cheers, mib
P. S. Windows 10 is working with Intel driver

Hi, can reproduce on Elementry Freya 64 with Mesa 3.0. Intel HD 4400. [system-info.txt](https://archive.blender.org/developer/F221617/system-info.txt) Cheers, mib P. S. Windows 10 is working with Intel driver

Martijn Berger commented

2015-08-08 08:45:28 +02:00

Added subscriber: @MartijnBerger

Martijn Berger commented

2015-08-08 08:45:28 +02:00

Changed status from 'Open' to: 'Archived'

Martijn Berger closed this issue

2015-08-08 08:45:28 +02:00

Martijn Berger commented

2015-08-08 08:45:28 +02:00

This is not a bug.

To use opensubdiv you need to be able to both render one or more backends AND support all the following OpenGL extensions:

Geometry shader support ( Part of OpenGL 3.2)
GL_ARB_gpu_shader5 ( Part of OpenGL 4.0 or an extension )
glProgramParameteri, glProgramParameteriEXT, glProgramParameteriARB ( Part of OpenGL 4.1 or as an extention )

Using mesa 10.6 is not expected to work. Mesa 11.x git might work. (based on -> http://mesamatrix.net/ it should work)

This is not a bug. To use opensubdiv you need to be able to both render one or more backends **AND** support all the following OpenGL extensions: - Geometry shader support ( Part of OpenGL 3.2) - GL_ARB_gpu_shader5 ( Part of OpenGL 4.0 or an extension ) - glProgramParameteri, glProgramParameteriEXT, glProgramParameteriARB ( Part of OpenGL 4.1 or as an extention ) Using mesa 10.6 is not expected to work. Mesa 11.x git might work. (based on -> http://mesamatrix.net/ it should work)

first last commented

2015-08-08 11:03:09 +02:00

Even CPU backends needs OpenGL support, why?
From my point of view it doesn't make much sense. If my card and its driver support those OGL extensions why would i even try CPU backends, why do they exist in the first place?

Even CPU backends needs OpenGL support, why? From my point of view it doesn't make much sense. If my card and its driver support those OGL extensions why would i even try CPU backends, why do they exist in the first place?

Sergey Sharybin commented

2015-08-08 18:03:02 +02:00

Changed status from 'Archived' to: 'Open'

Sergey Sharybin reopened this issue

2015-08-08 18:03:02 +02:00

Sergey Sharybin commented

2015-08-08 18:03:02 +02:00

While compute could happen on CPU you still need to be able to draw stuff in the viewport. It's possible to use approach which is similar to non-opensubdiv case but that's not very efficient.

We probably will look into this later but for now it's not considered a bug.

While compute could happen on CPU you still need to be able to draw stuff in the viewport. It's possible to use approach which is similar to non-opensubdiv case but that's not very efficient. We probably will look into this later but for now it's not considered a bug.

first last commented

2015-08-08 20:03:52 +02:00

Thanks for more clear answer.

first last commented

2015-08-08 20:04:00 +02:00

This comment was removed by @StasSidorenko

*This comment was removed by @StasSidorenko*

Sanc Tuary commented

2015-08-10 20:12:31 +02:00

Added subscriber: @sanctuary

Sanc Tuary commented

2015-08-10 20:12:31 +02:00

In #45717#327081, @Sergey wrote:
While compute could happen on CPU you still need to be able to draw stuff in the viewport. It's possible to use approach which is similar to non-opensubdiv case but that's not very efficient.

We probably will look into this later but for now it's not considered a bug.

Maybe you should add in the doc page something about the opengl requirement even for those "CPU"and "OpenMP" backend to avoid further bug reports about those options missing for the opensubdiv, because from an user point of view, it's not obvious having "None" as the only option is not a bug and that high OpenGL is still required as the current doc does not suggest opengl involvement for those backends :
//
CPU - single threaded CPU implementation. it is mainly useful in cases when GPU compute is possible and threaded CPU option causes artifacts (it is unlikely to happen, but still possible).
OpenMP - multi-threaded CPU implementation. It is similar to threading model of old subsurf code. Use it for maximum performance in cases when GPU compute is not available. //

> In #45717#327081, @Sergey wrote: > While compute could happen on CPU you still need to be able to draw stuff in the viewport. It's possible to use approach which is similar to non-opensubdiv case but that's not very efficient. > > We probably will look into this later but for now it's not considered a bug. Maybe you should add in the doc page something about the opengl requirement even for those "CPU"and "OpenMP" backend to avoid further bug reports about those options missing for the opensubdiv, because from an user point of view, it's not obvious having "None" as the only option is not a bug and that high OpenGL is still required as the current doc does not suggest opengl involvement for those backends : // CPU - single threaded CPU implementation. it is mainly useful in cases when GPU compute is possible and threaded CPU option causes artifacts (it is unlikely to happen, but still possible). OpenMP - multi-threaded CPU implementation. It is similar to threading model of old subsurf code. Use it for maximum performance in cases when GPU compute is not available. //

Sergey Sharybin commented

2015-08-24 10:23:25 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2015-08-24 10:23:25 +02:00

Sergey Sharybin commented

2015-08-24 10:23:25 +02:00

Docs are still work in progress, but will make sure it's clear what's going on in the final doc version.

Also didn't really meant to re-open the report, it's a TODO so far rather than a bug.

Docs are still work in progress, but will make sure it's clear what's going on in the final doc version. Also didn't really meant to re-open the report, it's a TODO so far rather than a bug.

Riccardo Giovanetti commented

2015-08-31 18:28:25 +02:00

Just for your information, today I installed the latest 64bit zipped version of Blender (Hash: 6a80c2c) and differently from my previous post (see above), now none of the previously listed options is available in the System Preferences, and therefore I cannot enable Use OpenSubdiv in the Subsurf Modifier.

I understand that my graphics card is quite old (GeForce GTS 360M, 1GB, OpenCL 1.1), that's the reason why I use only CPU rendering or external render farms, but I don't understand why those options are now gone, and if the minimum requirements for the graphics card have been raised up to the point that OSD is now excluded from my notebook's capabilities.

Thanks.

Just for your information, today I installed the latest 64bit zipped version of Blender (Hash: 6a80c2c) and differently from my previous post (see above), now none of the previously listed options is available in the System Preferences, and therefore I cannot enable Use OpenSubdiv in the Subsurf Modifier. I understand that my graphics card is quite old (GeForce GTS 360M, 1GB, OpenCL 1.1), that's the reason why I use only CPU rendering or external render farms, but I don't understand why those options are now gone, and if the minimum requirements for the graphics card have been raised up to the point that OSD is now excluded from my notebook's capabilities. Thanks.

Sergey Sharybin commented

2015-09-03 08:43:32 +02:00

@Harvester, afraid it's one of those cases when some extension is not reported by driver but actually supported. It's a bit tricky to solve without making someone's else configuration to crash, but will see what we can do.

Riccardo Giovanetti commented

2015-09-03 15:45:26 +02:00

Thank you Sergey for your kind reply. FYI, the currently installed NVIDIA driver is version 341.81 and if there is any further information I can provide to help you find a fix, please let it me know.

Riccardo Giovanetti commented

2015-09-11 12:21:35 +02:00

Just a brief update having downloaded the second testbuild and I still have NONE only option in the OpenSubdiv compute's dropdown list, being on CPU only mode (Compute Device is None).

YAFU commented

2015-09-12 17:28:47 +02:00

Added subscriber: @YAFU

YAFU commented

2015-09-12 17:28:47 +02:00

@MartijnBerger wrote:
Using mesa 10.6 is not expected to work. Mesa 11.x git might work. (based on -> http://mesamatrix.net/ it should work)

Hello.
Desktop PC, Kubuntu 15.04 64bit, GTX 960 - 346.59 driver, intel HD 4000, Blender 2.75-26041f9 from buildbot.
Using iGPU as primary display.
I installed Mesa 11.1.0-devel from this PPA:
https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers

CUDA is available under "Compute Device". But only option "None" appears under "OpenSubdiv Compute".
This is what shows glxinfo:
http://www.pasteall.org/61120

>@MartijnBerger wrote: > Using mesa 10.6 is not expected to work. Mesa 11.x git might work. (based on -> http://mesamatrix.net/ it should work) Hello. Desktop PC, Kubuntu 15.04 64bit, GTX 960 - 346.59 driver, intel HD 4000, Blender 2.75-26041f9 from buildbot. Using iGPU as primary display. I installed Mesa 11.1.0-devel from this PPA: https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers CUDA is available under "Compute Device". But only option "None" appears under "OpenSubdiv Compute". This is what shows glxinfo: http://www.pasteall.org/61120

Sergey Sharybin commented

2015-09-12 19:07:14 +02:00

Do you mind attaching system-info.txt generated by blender?

The glxinfo doesnt' contain any information about GL_EXT_geometry_shader4 extension which is required for visualizing OpenSubdiv meshes.

Do you mind attaching system-info.txt generated by blender? The glxinfo doesnt' contain any information about `GL_EXT_geometry_shader4` extension which is required for visualizing OpenSubdiv meshes.

YAFU commented

2015-09-12 19:49:40 +02:00

Hello Sergey.
Here it is:
http://www.pasteall.org/61121

Hello Sergey. Here it is: http://www.pasteall.org/61121

Sergey Sharybin commented

2015-09-12 19:52:24 +02:00

Yes, the video driver doesn't support geometry shaders which are required for displaying OpenSubdiv meshes.

In theory we could make drawing code requiring less features from GPU, but in practice it'll mean much much less optimal code which will eliminate benefits of OpenSubdiv.

Yes, the video driver doesn't support geometry shaders which are required for displaying OpenSubdiv meshes. In theory we could make drawing code requiring less features from GPU, but in practice it'll mean much much less optimal code which will eliminate benefits of OpenSubdiv.

Riccardo Giovanetti commented

2015-09-13 01:15:50 +02:00

Hi Sergey, I am not sure if my GPU can support OpenSubDiv and since you mentioned above GL_EXT_geometry_shader4 which apparently seems supported by my graphics card, would you mind checking my system-info.txt report below and let me know about it? Thank you.

http://www.pasteall.org/61124/text

Hi Sergey, I am not sure if my GPU can support OpenSubDiv and since you mentioned above GL_EXT_geometry_shader4 which apparently seems supported by my graphics card, would you mind checking my system-info.txt report below and let me know about it? Thank you. http://www.pasteall.org/61124/text

Sergey Sharybin commented

2015-09-18 15:27:47 +02:00

You can consult the actual function which checks for whether GPU draw is allowed or not there https://developer.blender.org/diffusion/B/browse/master/intern/opensubdiv/opensubdiv_capi.cc;45a875fec4c00ccf87c5605d85f004f6dd4be8a0$297

SO currently you need return EXT_geometry_shader4, ARB_gpu_shader5 and ARB_uniform_buffer_object but that might be changing over time.

You can consult the actual function which checks for whether GPU draw is allowed or not there https://developer.blender.org/diffusion/B/browse/master/intern/opensubdiv/opensubdiv_capi.cc;45a875fec4c00ccf87c5605d85f004f6dd4be8a0$297 SO currently you need return EXT_geometry_shader4, ARB_gpu_shader5 and ARB_uniform_buffer_object but that might be changing over time.

Riccardo Giovanetti commented

2015-09-18 15:49:17 +02:00

Thank you Sergey. As far as I can see in my laptop's system-info.txt my graphics card is missing ARB_gpu_shader5 at least. Time to consider buying a new, more modern laptop.

Mike Erwin commented

2015-11-14 22:54:24 +01:00

Added subscriber: @MikeErwin

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Only "None" OpenSubDiv option in preferences to choose from #45717