topic Re:Multi-GPU setup - possible solution to freezing in Graphics

Multi-GPU setup - possible solution to freezing

JanT — Fri, 28 Jul 2023 18:24:02 GMT

System: Ryzen 5600G APU + Intel Arc 16GB LE in PCIe 3.0 x8 slot + NVIDIA GTX 1650 Super in PCI 2.0 x4 slot (behind B450 chipset). Also PS/2 mouse...

This setup was freezing randomly, until I discovered that I need enable MSI (message signaled interrupts) in registry for NVIDIA card. Now it works without freezes, finally.

The key to be added is like this:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI\...\...\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties]
"MSISupported"=dword:00000001

Where ...\... is system specific adress that has to be found (just go to Enum\PCI and search NVIDIA and check that there is a name of your GPU).

Then add MessageSignaledInterruptProperties key and dword value MSISupported = 1.

Now both Intel, NVIDIA and even AMD work together in Windows and seems finall stable:

It is very important that all GPUs have negative IRQ in device manager. Also beware - updating NVIDIA driver will disable MSI interrupts and registry must be manually edited again. I prefer manual editing by regedit withou using unknown thirdparty tools.

Those MSI interrupts when they are not enabled might be behind sound stutters on some systems too. There is not much info on the internet on this topic, but it might be very important to solve random freezing in some system. Pay attention to the messages in bluescreen, if it contains DPC_WATCHDOG_VIOLATION then it is IRQ problem.

What helped me a lot are those topics:

Puget system:

https://www.pugetsystems.com/support/guides/updated-watchdog-dpc/

Guru3D:

https://forums.guru3d.com/threads/windows-line-based-vs-message-signaled-based-interrupts-msi-tool.378044/

Re:Multi-GPU setup - possible solution to freezing

Jean_Intel — Mon, 31 Jul 2023 17:22:19 GMT

Hello JanT,

Thank you for posting on the Intel️® communities. We would be more than glad to help you.

We are glad to know you found a solution, thank you for taking the time to share this fix, and hopefully, it may help other community members experiencing similar behavior. If you require any further assistance, please do not hesitate to let us know.

Best regards,

Jean O.

Intel Customer Support Technician

Re:Multi-GPU setup - possible solution to freezing

Jean_Intel — Mon, 07 Aug 2023 18:51:56 GMT

Hello JanT,

We hope you are doing fine.

We have not heard back from you. So we will close this thread. If you need any additional information, submit a new question, as this thread will no longer be monitored.

Best regards.

Jean O.

Intel Customer Support Technician.

Re: Multi-GPU setup - possible solution to freezing

zenon — Sun, 26 Nov 2023 03:41:12 GMT

Are there any downsides to the Nvidia card enabling MSI?