[Mac Mini 6,2] ACPI Errors when booting Ubuntu.

[sanctimon]

The following warnings and errors significantly delay boot on Mac Mini 6,2 (Intel, late 2012):

DMAR-IR: [Firmware Bug]: ioapic 2 has no mapping iommu, interrupt remapping will be disabled
ACPI Error: Needed type [Reference], found [Integer] 000000002b60be2b (20220331/exresop-66)
[ +0.000000] ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Store] (20220331/dswexec-431)
[ +0.000000] ACPI Error: Aborting method \_PR.CPU0._PDC due to previous error (AE_AML_OPERAND_TYPE) (20220331/psparse-529)

These stay on screen for at least 15 - 25 seconds before actually booting.

Description: Ubuntu 22.04.2 LTS
Release: 22.04

The ACPI dump file contains more than 200 errors:

Maximum error count (200) exceeded
Table Input: acpidump.txt - 211185 bytes 0 fields 0 source lines
Binary Output: (null) - 0 bytes

Compilation failed. 201 Errors, 0 Warnings, 0 Remarks

Examples: ERROR at line 2743: Unterminated quoted string

Maximum error count (200) exceeded
acpidump.txt 2: 0000: 53 53 44 54 59 01 00 00 02 53 41 50 50 4C 45 20 SSDTY....SAPPLE
Error 6313 - ^ Invalid field label detected (found "0000" expected "Signature")

acpidump.txt 2: 0000: 53 53 44 54 59 01 00 00 02 53 41 50 50 4C 45 20 SSDTY....SAPPLE
Error 6123 - ^ String literal too long (Maximum 4 characters, found 64 characters [53 53 44 54 59 01 00 00 02 53 41 50 50 4C 45 20 SSDTY....SAPPLE])

acpidump.txt 3: 0010: 49 47 48 64 61 00 00 00 00 10 00 00 49 4E 54 4C IGHda.......INTL
Error 6313 - ^ Invalid field label detected (found "0010" expected "Table Length")

acpidump.txt 3: 0010: 49 47 48 64 61 00 00 00 00 10 00 00 49 4E 54 4C IGHda.......INTL
Error 6126 - syntax error ^

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Libera.chat.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/2007768/+editstatus and add the package name in the text box next to the word Package.

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