My host is running VirtualBox 5.2.42_Ubuntur137960 on Ubuntu server 18.04.6 64bit with 31G RAM and no GUI (I run everything headless).
One of my guests, running Ubuntu 20.04.3 64bit, 8G RAM and Guest Additions 5.2.42 is configured to use 2 CPUs but only sees 1. It was originally configured for 1 CPU but I modified the config to 2 later on.
Why can't my guest see the 2nd CPU?
I'm a long time VirtualBox user but first time poster.
THANK you in advance.
[Solved] Guest has only 1 CPU but configured for 2
[Solved] Guest has only 1 CPU but configured for 2
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- Volunteer
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- Primary OS: Mac OS X other
- VBox Version: PUEL
- Guest OSses: Linux, Windows 10, ...
- Location: Germany
Re: Guest has only 1 CPU but configured for 2
Because the I/O APIC is disabled in the VM configuration. The VirtualBox Manager would have forced you to enable it.Stache wrote:Why can't my guest see the 2nd CPU?
Re: Guest has only 1 CPU but configured for 2
This fixed it:
Thanks fth0!!
Code: Select all
vboxmanage modifyvm <VM Name> --ioapic on