ACPI BIOS Errors and Slow Boot on HP EliteBook 830 G6 (Ubuntu 24.04.2 LTS)

[Shaikh_Muhammad]

Dear HP Support,

I have recently installed Ubuntu 24.04.2 LTS on my HP EliteBook 830 G6, and I'm encountering persistent ACPI BIOS errors along with a significantly slower boot time compared to Windows.

Issue Summary:

• On Windows, the system boots in around 15 seconds, but on Ubuntu, it takes more than 45 seconds, even after updating to the latest R70 BIOS.

• I ran a diagnostic using the command sudo dmesg | grep -i "error" and found the following ACPI-related errors very early in the boot process:
  
  [ 0.407651] ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Field [CAP1] at bit offset/length 64/32 exceeds size of target Buffer (64 bits) (20240322/dsopcode-198)
  [ 0.407713] ACPI Error: Aborting method \_SB._OSC due to previous error (AE_AML_BUFFER_LIMIT) (20240322/psparse-529)
  [ 0.677226] ACPI BIOS Error (bug): AE_AML_PACKAGE_LIMIT, Index (0x000000005) is beyond end of object (length 0x5) (20240322/exoparg2-393)
  [ 0.677273] ACPI Error: Aborting method \_TZ.GETP due to previous error (AE_AML_PACKAGE_LIMIT) (20240322/psparse-529)
  [ 0.677282] ACPI Error: Aborting method \_TZ.CHGZ._CRT due to previous error (AE_AML_PACKAGE_LIMIT) (20240322/psparse-529)
  [ 0.678407] ACPI BIOS Error (bug): AE_AML_PACKAGE_LIMIT, Index (0x000000005) is beyond end of object (length 0x5) (20240322/exoparg2-393)
  [ 0.678446] ACPI Error: Aborting method \_TZ.GETP due to previous error (AE_AML_PACKAGE_LIMIT) (20240322/psparse-529)
  [ 0.678454] ACPI Error: Aborting method \_TZ.CHGZ._CRT due to previous error (AE_AML_PACKAGE_LIMIT) (20240322/psparse-529)
  
  These appear to be related to malformed or unsupported ACPI tables being exposed by the firmware, which the Linux kernel is unable to parse properly. As a result, power and thermal management may not be functioning correctly, and the system remains unstable at times.
  
  

[Meghana_10]

@Shaikh_Muhammad, Welcome to the HP Support Community. 

Thanks for reaching out about your query regarding the HP EliteBook 830 G6 (Ubuntu 24.04.2 LTS).

We're thrilled to have the opportunity to assist you and provide a solution. We hope our assistance has been helpful! 

The ACPI BIOS errors and slower boot times you're encountering on your HP EliteBook 830 G6 when running Ubuntu are common issues that can occur when there's a compatibility mismatch between the BIOS firmware and the Linux kernel's ACPI implementation.

Here are some steps you can take to address these issues:

Update BIOS:

1. Visit HP's Support Site:
   • Go to the official HP Support page and search for your specific model (HP EliteBook 830 G6).
   • Check for any BIOS updates. If a newer version is available, download and install it following the provided instructions.

Check and Update Ubuntu

2. System Updates:

   • Open the Terminal and update your system by running:

     sudo apt update
     sudo apt upgrade
     

3. Check for Kernel Updates:

   • Ensure that your kernel is up-to-date. You can install the latest kernel via:

     sudo apt install linux-generic-hwe-20.04
     

4. ACPI Workarounds:

   • You can try booting with ACPI workarounds if the errors persist. This involves editing the GRUB configuration:

     • Open the GRUB configuration file:

       sudo nano /etc/default/grub
       

     • Find the line starting with GRUB_CMDLINE_LINUX_DEFAULT and add acpi=off or acpi=strict, separated by spaces, to the existing parameters:

       GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off"
       

     • Save the file and update GRUB:

       sudo update-grub
       

     • Restart your computer and check if the boot time improves.

Boot Time Analysis

5. Analyze Boot Time:

   • Use systemd-analyze to identify which processes are delaying the boot time. Run:

     systemd-analyze
     systemd-analyze blame
     

   • Look for processes that take the most time and consider optimizing or disabling unnecessary services.

I hope this helps!

Take care and have an amazing day! 

If you would like to thank us for our efforts to help you, go to the public post and give us a virtual high-five by clicking on "Yes" for the question "Was this reply helpful?" below my message, followed by clicking on the "Accept as solution" on my public post.

Regards,

Meghana