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David Seo avatar image
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David Seo asked Phil BoBo edited

FlexSim can't recognize any graphics cards of THREE graphics cards.

My customer's desktop is using THREE graphics cards of TWO Nvidia Tesla V100 and ONE Geforce GTX 1050 card. FlexSim can't show any information about them in Start page and Help>About FlexSim menu screen.

His FlexSim shows the slow animation like no graphic cards.

He has installed the latest graphic driver from NVidia homepage. But it is invalid.

How can he control it?

FlexSim 20.1.2
flexsim 20.1.2nvidia tesla v100three graphic cards
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Joerg Vogel avatar image Joerg Vogel commented ·

Hi @Seung Yong Seo, please provide some more informations on the system of your customer. There are some problems of BIOS settings and / or out-dated hardware, that can cause such problems. Even it could be a problem of an out dated windows system like XP, 7 or 10 like Version 1505. It can be a problem of 32-Bit to 64-Bit. It can be a software product or hardware device that prevent to customize a system. There are many different software tools to get information on a system, but you must at least know which software version he has installed. It can also be that he tries to run FlexSim in a Virtual Machine on a Mac OS.

He can try to install in-system basic drivers, recommended certified nvidia drivers or older drivers.

And it can be a broken system with a destroyed semiconductor or voltage regulator. Or the PCIe bus is not able to support the needed power supply of 75W.

At the end you need more data to support someone else to meet the minimum hardware requirements. Regards Jörg

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Joerg Vogel avatar image Joerg Vogel commented ·

Does your customer try to run a system with three simultaneously installed graphic cards? Has he tried to run his system with only one installed card? Regards Jörg. I can’t believe it!

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David Seo avatar image David Seo Joerg Vogel commented ·

Hi. @Jörg Vogel. Thank you for your reply.

They are using the PC for Machine deep-Learning ie AI. So it has so many graphics cards. V100 graphics card is about US$10,000 they say. Yes. the modeler is studying AI programming and has many experiences about simulation software. The PC has Windows 10 latest version and has not the out-dated hardware device issue, we think. They don't want to open the detail information about it you and I want to know.

Nvidia control software in Windows right mouse button shows the graphic chip V100 and 1050 information normally.

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Phil BoBo avatar image
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Phil BoBo answered Phil BoBo edited

FlexSim does not select a graphics card. FlexSim requests an OpenGL context from the operating system. The type of context requested is controlled via Global Preferences. FlexSim's default option is to ask the operating system for its recommended OpenGL context, which will return the latest OpenGL context that the system supports. Alternatively, you can configure FlexSim to specifically request a Core 3.3 profile or generic software rendering (Windows OpenGL 1.1 processed on the CPU, not the GPU).

The operating system makes calls into the graphics driver to determine the OpenGL context to return and what graphics card(s) to use.

Windows Remote Desktop Protocol (RDP) does not do graphics passthrough by default. So if you are remoted into the machine, then the OS is going to return a Microsoft GDI Generic OpenGL context regardless of what hardware is available.

You can either connect to the machine as a client workstation by plugging in a monitor, mouse, and keyboard directly, or you can try to figure out how to configure the server to do hardware acceleration graphics passthrough. Configuring a server to access its graphics hardware is a Windows question, not a FlexSim question. That's beyond the scope of FlexSim technical support. FlexSim is a client application. If you want to run it on a server, then you need to configure your server accordingly.

See https://docs.microsoft.com/en-us/azure/virtual-desktop/configure-vm-gpu#configure-gpu-accelerated-app-rendering

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Ben Wilson avatar image
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Ben Wilson answered Phil BoBo converted comment to answer

Hi @Seung Yong Seo,

They should check their in-software graphics settings:

In particular, they should make sure FlexSim is NOT set to use the Generic context.

FlexSim can't show any information about them in Start page and Help>About FlexSim menu screen.

So, what text is shown at those locations?

I assume the graphics cards do properly show up in Windows device manager?

I know there isn't specifically a problem for desktops with three graphics cards, since that is also what I'm running (though different cards - no $10K beasties for me).

Finally, be sure to point them to our article on graphics issues and solutions.


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David Seo avatar image David Seo commented ·

Dear @Ben Wilson.

Yes. I guided this topic page your comment to my customer. The 'recommended' setting in FlexSim and Windows device manager's showing information is normal like your explanation.

And my customer issue can't be solved also in the link 'article on graphics issues'.

What's the wrong in my customer's PC?

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Phil BoBo avatar image Phil BoBo ♦♦ David Seo commented ·

Do they have monitors plugged into a PC?

Or are they using Windows Remote Desktop to connect to a headless server?

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David Seo avatar image David Seo Phil BoBo ♦♦ commented ·

@phil.bobo

I will check it with my customer. Maybe it is likely to use it remotely, I will check it.

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Ben Wilson avatar image Ben Wilson ♦♦ David Seo commented ·

@Seung Yong Seo

FlexSim can't show any information about them in Start page and Help>About FlexSim menu screen.

So, what text is shown at those locations?

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Joerg Vogel avatar image Joerg Vogel Ben Wilson ♦♦ commented ·

@Ben Wilson, @Seung Yong Seo, I read about those cards for HPC at nvidia site. The setup of those cards depends on a licensed driver to distinguish which feature should be evaluated. Deap Learning or Graphic output are different drivers. Maybe I understood this information wrong again. If your customer primarily is focused on AI and Deap Learning then the installed driver may not support the graphical output to a screen.

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