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ACPI Error - Unable to Reboot System - Linux OS

HP Recommended
HP EliteDesk 800 G4 SFF PC

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?


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