Due to a problem with the BIOS or ACPI, the Ubuntu AE not found error may happen. At Bobcares, with our Server Management Service, we can handle your issues.

Fixing “ACPI BIOS Ubuntu AE Not Found” Error

A power and configuration management interface between an operating system and the hardware is defined by the industry standard known as ACPI (Advanced Configuration and Power Interface). It’s essential for hardware discovery at bootup, power management, and system setup.

Usually, the AE_NOT_FOUND error means that an essential ACPI item couldn’t be located. There are several potential causes for this, including a kernel bug, a BIOS issue, or a fault with the ACPI tables.

Solution 1: Turn off the ACPI

The simplest way is to turn off the ACPI. This is not advised, though, as ACPI is essential for system setup and power management. Disabling it can cause other problems. The steps to follow include:

1. Firstly, we need to edit the GRUB file. So, open the terminal and type the following command:

sudo nano /etc/default/grub

2. Now, locate the line starting with GRUB_CMDLINE_LINUX_DEFAULT and add acpi=off at the end of the line. Now it becomes:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off"

3. Press Ctrl+X, Y, then Enter to save and close the file.

4. Then run the following command to upgrade GRUB:

update-grub in sudo

5. Lastly, restart the system. ACPI is now disabled.

Solution 2: Update the BIOS

Updating the BIOS is the second option. In some cases, older BIOS versions are the root of ACPI issues.

Follow these steps to update BIOS:

1. Identify the motherboard model of the system.
2. Visit the manufacturer’s website and download the latest BIOS update for the motherboard model.
3. Now, follow the manufacturer’s instructions to update the BIOS, which may involve creating a bootable USB drive or using a BIOS flashing utility.
4. After the BIOS update is complete, reboot the system.

Updating the BIOS to the latest version can often resolve ACPI-related issues caused by older BIOS versions that are not fully compliant with the ACPI specification.

Solution 3: Boot with an older Kernel version

If you run into ACPI BIOS errors, only when using the latest kernel version, we can try booting with an older kernel version that does not exhibit the problem.

This can be done by selecting the desired kernel version from the GRUB menu during boot time.

Here’s how we can boot with an older kernel version to resolve the ACPI BIOS error:

1. First, restart the Ubuntu system.
2. Once the boot process begins, hold down the Shift key (if the system uses BIOS) or Esc key (if the system uses UEFI) to display the GRUB menu.
3. In the GRUB menu, use the arrow keys to go to the “Advanced options for Ubuntu” entry and press Enter.
4. Then, choose the older kernel version we want to use. If a recently updated kernel is causing issues, choose a version that doesn’t have the highest version number.
5. Next, press Enter to boot with the selected older kernel version.

By booting with an older kernel version, we can bypass the latest kernel that is causing the ACPI BIOS error. This will help identify if the issue is specific to the latest kernel release.

It’s important to note that using an older kernel version may not be a long-term solution, as it may miss out on important security updates and bug fixes. However, it can be a useful troubleshooting step to determine if the ACPI BIOS error is related to the kernel version.

[Need to know more? Get in touch with us if you have any further inquiries.]

Conclusion

We can decide to ignore the error if the system is still functioning normally. This is not a fix, though, and the mistake might cause more problems down the road.