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How To Fix “Mp-bios bug:8254 timer not connected to io-apic” Error in VirtualBox

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VirtualBox is a powerful tool that allows users to run multiple operating systems on a single machine. However, like any software, it can sometimes present errors that can be tricky to resolve. One such error is the “Mp-bios bug:8254 timer not connected to io-apic”. In this article, we will delve into the causes of this error and provide detailed steps on how to resolve it.

Quick Answer

To fix the "Mp-bios bug:8254 timer not connected to io-apic" error in VirtualBox, you can try disabling the "Enable I/O APIC" option in the virtual machine settings. If that doesn’t work, you can modify the grub startup parameters by including the "noapic" option. Another solution is to disable all extended features in the virtual machine settings.

Understanding the Error

The “Mp-bios bug:8254 timer not connected to io-apic” error typically occurs when you are trying to boot a virtual machine in VirtualBox. This error is related to the Advanced Programmable Interrupt Controller (APIC), a hardware component that handles different types of interrupts. The error message indicates that the 8254 Programmable Interval Timer (PIT) is not connected to the I/O APIC, which can cause the virtual machine to fail to boot.

Solution 1: Disable the “Enable I/O APIC” Option

One of the easiest solutions to this error is to disable the “Enable I/O APIC” option in the virtual machine settings. Here’s how to do it:

  1. Open VirtualBox and select the virtual machine that is experiencing the error.
  2. Click on “Settings”, then go to the “System” tab.
  3. Within the “System” tab, find the “Motherboard” section.
  4. Uncheck the “Enable I/O APIC” option.
  5. Click “OK” to save your changes.

Once you’ve done this, try to boot your virtual machine again. If the error persists, proceed to the next solution.

Solution 2: Modify the Grub Startup Parameters

Another method to resolve this error is to modify the grub startup parameters by including the “noapic” option. This option disables the APIC system on Linux systems, which can resolve the error.

Here’s how to do it:

  1. Open a terminal.
  2. Type sudo nano /etc/default/grub to open the grub configuration file in a text editor.
  3. Locate the line that starts with GRUB_CMDLINE_LINUX_DEFAULT.
  4. Add noapic to the end of the line, making sure to leave a space between the last parameter and noapic. It should look something like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noapic".
  5. Press Ctrl+X to exit the editor, then press Y to save your changes.
  6. Update grub with the command sudo update-grub.

After performing these steps, restart your virtual machine. If the error is still present, you may need to disable all extended features in the virtual machine settings.

Solution 3: Disable All Extended Features

This solution involves disabling all extended features in the virtual machine settings. Here’s how:

  1. Open VirtualBox and select the problematic virtual machine.
  2. Click on “Settings”, then go to the “System” tab.
  3. Within the “System” tab, find the “Motherboard” section.
  4. Disable all the extended features.
  5. Start the virtual machine and press the “Esc” key immediately after the logo disappears.
  6. You will see three options. Select the second option with “recovery” written on it.

This solution is not a permanent fix and may need to be performed at each startup. If you want a permanent solution, you can refer to the steps provided in Solution 2.

Conclusion

The “Mp-bios bug:8254 timer not connected to io-apic” error in VirtualBox can be a nuisance, but it is not insurmountable. By following the solutions provided in this article, you should be able to resolve the error and continue using VirtualBox without any issues. Remember that it’s always a good idea to keep your VirtualBox software up-to-date to prevent such errors from occurring.

What is VirtualBox?

VirtualBox is a virtualization software that allows users to run multiple operating systems on a single machine.

What is the purpose of the “noapic” option in the grub startup parameters?

The "noapic" option in the grub startup parameters disables the APIC system on Linux systems, which can help resolve the "Mp-bios bug:8254 timer not connected to io-apic" error in VirtualBox.

How can I prevent the “Mp-bios bug:8254 timer not connected to io-apic” error from occurring in the future?

To prevent the "Mp-bios bug:8254 timer not connected to io-apic" error from occurring in the future, it is recommended to keep your VirtualBox software up-to-date. Regularly updating VirtualBox can help resolve known bugs and issues.

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