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- ACPI Error - Unable to Reboot System - Linux OS

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03-13-2020 09:14 PM
I have an HP EliteDesk 800 G4 SFF PC, BIOS Version: Q01 Ver. 02.07.01, running Linux OS with EFI boot.
MS Windows OS ver. 10 was originally installed, but was removed.
The system boots normally after a full shutdown but there is a persistent ACPI error that prevents a soft reboot.
The following errors are reported:
ACPI Error: Field [CAP1] at bit offset 64/32 exceeds size of target buffer (64 bits)
ACPI Error: Method parse/execution failed \_SB._OSC,AE_AML_BUFFER_LIMIT (20170303/psparse-516)
There are more recent BIOS versions that include ACPI changes. It is not clear from the release notes that they address the Linux reboot errors I am seeing.
Would a BIOS upgrade be worthwhile?
When i search for HP BIOS upgrades for this machine I am only able to find versions specified for various MS Windows 10 OS releases, although HP does supply this machine to institutional purchasers with only DOS installed.
How can I find BIOS upgrades for DOS? If they are not available to retail users, how can I determine which BIOS upgrades may be suitable for this machine without an installed MS Windows 10 OS?
