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Asked: 2024-09-25T03:00:54+05:30 In:

I’m encountering an ACPI error labeled AE_NOT_FOUND when trying to boot my system after upgrading from Ubuntu 20.04 to 22.04. Has anyone else experienced this issue, and if so, what solutions or workarounds have you found?

So, I recently took the plunge and upgraded my Ubuntu from 20.04 to 22.04, thinking it was high time for a fresh start with all the shiny new features. Everything seemed to go smoothly during the installation process, but now, when I try to boot up my system, I get hit with this frustrating ACPI error labeled AE_NOT_FOUND. I’ve been staring at the screen, and it feels like I’m in some kind of tech horror movie where the computer just won’t cooperate.

Honestly, I’m starting to feel a bit lost here. I’ve done some digging online, and it seems like this isn’t an unheard-of issue, but I could really use a hand. I mean, I’ve come across some threads where folks mentioned similar problems, but their solutions were all over the place – from adjusting boot parameters to updating BIOS. It’s a bit overwhelming, to say the least. I even tried booting with different kernel options like “acpi=off” and “nolapic,” but that didn’t seem to work out for me.

Has anyone else bumped into this AE_NOT_FOUND error after upgrading to 22.04? I’m curious if there are specific methods or tweaks that have worked for others. Should I be looking into the BIOS settings more closely, or maybe a specific driver issue related to my hardware? I don’t want to jump into a full reinstall unless I absolutely have to, so if anyone has found some solid workarounds or tips, I’d love to hear them.

Also, any advice on general troubleshooting steps would be super appreciated. I’ve got some important files on there that I’d prefer not to lose in this whole process. It’d be great to connect with anyone who’s navigated this weird ACPI error maze. Thanks in advance for any insights you might share!

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    2 Answers

    1. Sounds like you’re in a bit of a pickle there! The AE_NOT_FOUND ACPI error can definitely throw a wrench in the works after an upgrade. Here are a few things you might try to get back on track:

      • BIOS Settings: Double-check your BIOS settings. Make sure that ACPI is enabled and that there aren’t any funky settings that might be causing issues. Sometimes just resetting to default settings can help.
      • Kernel Parameters: Since you’ve already tried acpi=off and nolapic, you could also give noapic or acpi_osi=! acpi_osi='Windows 2015' a shot. It’s a bit of trial and error, but sometimes one of those tweaks can make a difference.
      • Update Your BIOS: If you’re comfortable doing so, check if there’s an update available for your BIOS. Sometimes manufacturers release updates that fix compatibility issues with new OS versions.
      • Boot into Recovery Mode: Try booting into recovery mode from the GRUB menu (hold Shift during boot). From there, select “Advanced options” and see if you can boot using an older kernel.
      • Check Logs: If you manage to boot into recovery or another environment, checking log files in /var/log (like syslog or dmesg) might give you more insight into what’s going wrong during boot.
      • Live USB: If you’re worried about losing files, you could use a live USB to back them up before you do anything drastic. This way, you can at least access your files and make sure they’re safe.

      Hope some of this helps! It’s definitely frustrating, but you’re not alone in this. If you find something that works, be sure to share it back with the community. Good luck!

    2. Encountering the ACPI error AE_NOT_FOUND after upgrading to Ubuntu 22.04 can be quite distressing, especially when the upgrade process initially appears to go without a hitch. This error often indicates issues with how your hardware interacts with the newer kernel, which could stem from driver compatibility or certain BIOS settings not playing nicely with the new operating system version. First, it is recommended to revisit your BIOS settings. Check for any available updates from your motherboard manufacturer, as they can sometimes resolve these ACPI issues by improving hardware compatibility. Additionally, ensure that any necessary settings like “Secure Boot” or “Fast Boot” are disabled, as they can interfere with the boot process under certain configurations.

      If adjusting BIOS settings does not resolve the issue, consider exploring alternative kernel parameters beyond the ones you have already tried. Some users have found success using parameters like “noapic” or “pci=noacpi” alongside other options. If you are comfortable doing so, you might want to boot from a live USB and access your files for safekeeping before making further changes. As a last resort, backing up your important data can pave the way for a more comprehensive reinstallation, should you find that none of the workarounds yield results. Engaging with threads on online forums dedicated to Ubuntu issues can also provide tailored solutions that have worked for others in your situation.

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