Enable hardware acceleration on VGA output

[bdeschryver]

Hello guys,


could not find the answer in previous posts.

I am using a Dell prceision laptop with VGA+HDMI+DVI outputs. It has a Intel HD graphic integrated card + Nvidia Quattro K1100M...
For the event I am playing at, I need to output Resolume on the VGA output.
When I do so (full screen on secondary display), I see that my Intel HD graphic is indicated on the VGA output and video performance is very low...
How could I enable my Nvidia Quattro on this output ? Does anybody ran into the same problem before ?
Maybe the VGA output does not allow using the Nvidia card ?


Thank you !

[DayVeeJay]

There should be a utility made by dell for switching the GPU's

[Joris]

Also keep in mind that the Display Info does not necessarily show you which card is in use.

If you want to check which card Resolume is rendering on, check the log files:

viewtopic.php?f=7&t=11108&p=44241&hilit ... les#p44238

[bdeschryver]

Thanks for your answer Joris.

If it turns out Resolume is not using the nice Nvidia card, any idea how to force it ?
I have set to use the Nvidia card preferably in the Nvidia config tool. Anywhere else to look ?

Is it true that if the HDMI out port of my laptop is surely linked to the Nvidia card, using resolume with output on HDMI will make it use the nice Nvidia card ?


Thank you.

[He2neg]

Maybe your VGA plug is only supportet (wired) to your intel card.

But your NVIDIA maybe has the possibility to use DVI - VGA adapters ( or even HDMI - VGA Adapters) so you can use some of the Pins on the digital plugs as a analog output.

[bdeschryver]

I actuelle did buy a hdmi vga adapter on amazon for 14€ and works like a charm!

[DayVeeJay]

So if multiple cards are installed, the majority of the processing is only happening on one of them?

[bdeschryver]

from what I understand, no matter on which output you send your video composition, the processing is done on your main (or chosen) video card.
In my case, no matter if I use the VGA output (Intel graphics) or HDMI (Nvidia graphics), the logs of Resolume show it is using the Nvidia cards for OpenGL.

Maybe can someone from resolume confirm ?

[Joris]

Eh? Confirm what?

The heavy lifting is always done on the graphic card that has the GUI on it. This is why using multiple GPUs is not so efficient. Your output texture is calculated on the first GPU, and then needs to be copied over to the others. It's much more efficient to use a single GPU with multiple outputs or a graphic extender.

Is that along the lines of what you wanted to hear?

[bdeschryver]

Well to answer your last question Joris, here is my example with my setup:
I am using aDell Precision M4800 which has integrated Intel HD graphics and also an Nvidia Quattro K110M.
No matter what output config I use, the Resolume log show that th Nvidia is selected for openGL.
If I output to VGA port, the display info (on resolume output) indicates Intel HD graphics.
If I use the HDMI port, Nvidia K110M is displayed.

Would I get the same performance using the VGA port (apparently linked to the intel HD graphics) or the HDMI port (liked to Nvidia) and an HDMI to VGA adapter behind ?

My feeling is that the second solution works better... can you confirm?