On 25/09/2019 04:27, Michael Tinsay wrote:
> Public bug reported:
>
> Background:
>
> I'm testing migration of our KVM guests from a server running on 16.04
> to a server running on 18.04.
Could you, please, provide information regarding your kernel versions
(host and guest) and the exact QEMU version you are using (package
version) ? Does this happen in more recent kernels (being used with same
RHEL 4 guest ?).
> Issue:
>
> In all RHEL4-based guests tested, ACPI is not being loaded. dmesg log
> contains the following:
>
> ACPI-0307: *** Error: ns_search_and_enter: Bad character in ACPI Name:
> 2E5C1502
> ACPI-0292: *** Error: Looking up [0x2E5C1502] (NON-ASCII) in namespace,
> AE_BAD_CHARACTER
> ACPI-1134: *** Error: [NULL NAME], AE_BAD_CHARACTER
> ACPI-0125: *** Error: acpi_load_tables: Could not load namespace:
> AE_BAD_CHARACTER
> ACPI-0134: *** Error: acpi_load_tables: Could not load tables:
> AE_BAD_CHARACTER
> ACPI: Unable to load the System Description Tables
This likely happens because your guest kernel can't handle the ACPI
tables being provided by QEMU. You can try dumping the ACPI tables and
disassembling them by executing:
$ sudo acpidump > acpi.dat
$ acpixtract -a acpi.dat
$ rm acpi.dat
and then executing:
$ for file in *.dat; do iasl -d $file; done
this will generate several .dsl files you can attach to this case. But,
it is very likely that it is your guest kernel that misbehaves with more
recent ACPI tables definitions, and, instead of finding only ASCII chars
where it expects, it also reads some binary data that it wasn't
expecting (and complains about it being non UTF-8, for example).
> The VMs will continue to boot up and run fine. But since ACPI is not
> running properly, the VMs do not completely shutdown when powering off.
> Issuing virsh shutdown <vm name> on the host also doesn't work because
> of this situation.
>
> I have tested this on 2 different machine: my work desktop and a bare
> metal instance in Oracle Cloud. Both are running 18.04 with latest
> updates.
>
> ** Affects: kvm (Ubuntu)
> Importance: Undecided
> Status: New
** Changed in: kvm (Ubuntu)
Status: New => Incomplete
** Changed in: kvm (Ubuntu)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1845290
Title:
ACPI issue with RHEL4 guest VM's
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