virtualbox.org

I have a HP Laptop with a AMD Rizen 5 2500U with Radon Vega Mobile GFX CPU.
I have Debian Bulldog installed in an Oracle VirtualBox v-6.1.36r152435 VM.
The CPU has 8 tghreads, but VirtualBox will only use a maximum of four.

VirtualBox cares about cores, not threads.

According to this page: https://www.amd.com/en/products/apu/amd-ryzen-5-2500u, that processor has 4 cores.

Thank you for your reply and the reference about the CPU. It works without any problems so I won't worry about it.

The thing that I am confused about is that I am using the same version of VirualBox on my Linux box and that installation shows eight threads out of eight. I use the VM to test new software without trashing the OS I use for my Computational Chemistry research.

Start the VM from full normal shutdown, not save-state. Run until you see the problem happen, then shut down the VM from within the VM's OS if possible. If not possible, close the Virtualbox window for the VM with the Power Off option set.

Right-click the VM in the main Virtualbox window's VM list, choose Show Log. Save the far left tab's log, zip it, and post the zip file, using the forum's Upload Attachment tab.

Thanks for the reply.

The zip file is attached

The Debian Bullseye-2022-08-29-12-38-56.log file shows that VirtualBox recognizes a "AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx " CPU with 4 cores and 8 threads, that you've configured the VM to use 4 vCPUs, and that you're running VirtualBox under the Hyper-V hypervisor on your Windows host.

I don't understand what you really mean with your statements so far.