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Kernel Panic Not Syncing Attempted to Kill the Idle Task
In some cases, you got the error Kernel Panic – not syncing: Attempted to kill the idle task when you trying to install an Arch Linux VM in VirtualBox.
The solution is quite simple:
1️⃣ To fix it, let turn off the Ubuntu VM.
2️⃣ Open VM Settings | Select System section.
3️⃣ Under the System options, select Processor tab then assign more than 2 processor cores for the VM. Click OK to save the change then start your VM.
4️⃣ As you can see, the error was gone, and now you able to install a new Arch Linux VM in VirtualBox.