RadeonSI Now Officially At OpenGL 4.2 Compliance

[bridgman]

Mesamatrix.net tables are not correct. r600 may be compliant with OpenGL 4.1 but some cards are still not supported (stuck at 3.3), which means the picture is far from perfect.

To be precise, the drivers support 4.1 up to the level the hardware does - but GPUs without fp64 HW support are stuck at 3.3 until someone implements logic to emulate the missing HW functionality in shader code.

Since there do not seem to be any apps which actually *use* that fp64 extension over-riding the GL version works well:

MESA_GL_VERSION_OVERRIDE=4.1 <app>

Some drivers appear to advertise fp64 (in order to get the higher GL level) without actually supporting it on 32-bit-only HW, but the devs didn't feel that was a good solution.

[nanonyme]

To be precise, the drivers support 4.1 up to the level the hardware does - but GPUs without fp64 HW support are stuck at 3.3 until someone implements logic to emulate the missing HW functionality in shader code.

Since there do not seem to be any apps which actually *use* that fp64 extension over-riding the GL version works well:

MESA_GL_VERSION_OVERRIDE=4.1 <app>

Some drivers appear to advertise fp64 (in order to get the higher GL level) without actually supporting it on 32-bit-only HW, but the devs didn't feel that was a good solution.

Wasn't there some variable for forcing advertising of the feature so you don't need to force entire level (which may work unpredictably on some hardware)?

[nanonyme]

MESA_EXTENSION_OVERRIDE=GL_EXT_foo apparently

[bridgman]

Wasn't there some variable for forcing advertising of the feature so you don't need to force entire level (which may work unpredictably on some hardware)?

Good point. Something like MESA_EXTENSION_OVERRIDE=GL_ARB_gpu_shader_64 <app> should work, although I haven't tried it.

[nanonyme]

Personally I'm hoping Intel ends up doing a by-shader implementation which ends up being partially or fully reusable. Let's see how it goes

[blae]

Nice! I got Alien:Isolation working with those two overrides myself

[Mez']

To be precise, the drivers support 4.1 up to the level the hardware does - but GPUs without fp64 HW support are stuck at 3.3 until someone implements logic to emulate the missing HW functionality in shader code.

Since there do not seem to be any apps which actually *use* that fp64 extension over-riding the GL version works well:

MESA_GL_VERSION_OVERRIDE=4.1 <app>

Some drivers appear to advertise fp64 (in order to get the higher GL level) without actually supporting it on 32-bit-only HW, but the devs didn't feel that was a good solution.

Hey, thanks for your answer. Though I already tried that without any luck on my 6650M (Northern Islands/Turks/Whistler Pro) with all the latests ppa enabled.
Plus, I think this specific model is not hardware limited to 3.3.

In the meantime, I cannot play games such as DIRT showdown with radeon/r600 driver and hence I am stuck to Ubuntu 15.10 with fglrx for the time being.

P.S: I will try those 2 specific overrides on my test partition, you newer know...

[Nille_kungen]

Hey, thanks for your answer. Though I already tried that without any luck on my 6650M (Northern Islands/Turks/Whistler Pro) with all the latests ppa enabled.
Plus, I think this specific model is not hardware limited to 3.3.

In the meantime, I cannot play games such as DIRT showdown with radeon/r600 driver and hence I am stuck to Ubuntu 15.10 with fglrx for the time being.

P.S: I will try those 2 specific overrides on my test partition, you newer know...

NI should work but i don't know if your card really is NI.
Looking at the old AMD page it looks like it's an Terascale 2 GPU and i think that's evergreen.

http://web.archive.org/web/20130314091340/http://www.amd.com/us/products/notebook/graphics/amd-radeon-6000m/amd-radeon-6700m-6600m/Pages/amd-radeon-6700m-6600m.aspx#2

There's some cards that doesn't have FP64 in hw and there for doesn't support OpenGL 4.1 but then the mesa overrides might work as written before in this thread.
Try "MESA_GL_VERSION_OVERRIDE=4.1 MESA_GLSL_VERSION_OVERRIDE=410 %command%" in steam.

[Mez']

NI should work but i don't know if your card really is NI.
Looking at the old AMD page it looks like it's an Terascale 2 GPU and i think that's evergreen.
http://web.archive.org/web/201303140...m-6600m.aspx#2
There's some cards that doesn't have FP64 in hw and there for doesn't support OpenGL 4.1 but then the mesa overrides might work as written before in this thread.
Try "MESA_GL_VERSION_OVERRIDE=4.1 MESA_GLSL_VERSION_OVERRIDE=410 %command%" in steam.

It did the trick! I already tried this previously but not by setting it as a launch property of the game in Steam itself. Thanks guys! ;-)

I can finally move on to 16.04 on my main station! This will also free up my test partition to fiddle with Manjaro.



P.S: It may be Terascale 2 but it is Northern Islands Vancouver mobile iteration (or Turks/RV930/Whistler Pro/...) with IGP Beaver Creek 6520G. And should support OpenGL up to 4.3.

https://www.techpowerup.com/gpudb/326/radeon-hd-6650m

https://en.wikipedia.org/wiki/Radeon...xxxM.29_Series

[nanonyme]

Good point. Something like MESA_EXTENSION_OVERRIDE=GL_ARB_gpu_shader_64 <app> should work, although I haven't tried it.

Tested locally. The right way to force it on is MESA_EXTENSION_OVERRIDE=GL_ARB_gpu_shader_fp64, however, it doesn't expose higher GL levels for me. Writing here in case primarily in case it ends up ever working or being useful. If you write bad extensions, you will get a very loud non-fatal error from Mesa.