How do I troubleshoot issues with disabling the Windows Hyper-V feature for Simulink Desktop Real-Time?

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MathWorks Support Team on 17 Jan 2022

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https://www.mathworks.com/matlabcentral/answers/1630650-how-do-i-troubleshoot-issues-with-disabling-the-windows-hyper-v-feature-for-simulink-desktop-real-ti

Edited: MathWorks Support Team on 29 Mar 2024 at 10:34

I tried to turn the Hyper-V feature off in Windows 10 by following the steps in this MATLAB Answers post:

https://www.mathworks.com/matlabcentral/answers/434279-why-is-my-simulink-desktop-real-time-simulation-very-slow-or-halts-in-windows-when-hyper-v-is-enable

However, my Simulink Desktop Real-Time simulation still doesn't work. How can I resolve this issue?

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Answer 1

MathWorks Support Team on 29 Mar 2024 at 0:00

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Edited: MathWorks Support Team on 29 Mar 2024 at 10:34

NOTE: The limitation regarding Simulink Desktop Real-Time (SLDRT) and Hyper-V was removed in version R2023a. Upgrade MATLAB to R2023a or later in order to use SLDRT in the presence of Hyper-V.

If you need to use SLDRT with version R2022b or prior, try the following steps:

(1) Make sure that you have restarted the computer after disabling the Hyper-V settings in the Windows feature list.

(2) After the restart, run the "systeminfo" command from Windows Command Prompt (CMD) or from MATLAB:

>> !systeminfo

In case Hyper-V is still enabled, you will see the following output:

Hyper-V Requirements: A hypervisor has been detected. Features required for Hyper-V will not be displayed.

Try to repeat the steps from the troubleshooting guide to disable Hyper-V.

https://www.mathworks.com/help/sldrt/troubleshooting-in-sldrt-target.html

Make sure that you have disabled all features that use Microsoft virtualization technology, for example:

Hyper-V
Virtual Machine Platform
Windows Hypervisor Platform
Windows Subsystem for Linux

Make sure to restart MATLAB again.

(3) Some of our customers reported that disabling the following resolved the issue for them in Windows 11:

https://superuser.com/a/1702614/1218362

"Go to Settings > Privacy & Security > Device Security > Core Isolation > Memory Integrity = OFF"

(4) Some of our customers reported that disabling Intel or AMD Virtualization support in the BIOS resolved the issue. See the following link for more info regarding Intel Virtualization:

https://www.intel.com/content/www/us/en/support/articles/000005486/processors.html

(5) We are aware of cases where disabling Hyper-V in the Windows feature list will not work, even after multiple attempts, and the Hyper-V feature will still be shown as enabled by "systeminfo". In this case, contact your IT helpdesk to disable Hyper-V on your machine, or upgrade MATLAB to version R2023a where this limitation regarding SLDRT and Hyper-V was removed.

(6) If your company's IT policies do not allow disabling Hyper-V, then you will not be able to use Simulink Desktop Real-Time (versions R2022b or prior) on this machine. Our recommendation is to talk to your IT helpdesk to get access to an "offline" machine that does not have to follow the company's IT policies. Also, note that other hypervisors such as VMware Workstation will work with Simulink Desktop Real-Time.