Public bug reported:
System:
- ASUS ROG Strix G18 G814JVR
- Ubuntu 26.04 LTS
- kernel 7.0.0-29-generic / Ubuntu 7.0.0-29.29-generic
- running-kernel ACPICA: 20251212
- BIOS tested:
- G814JVR.320, 2024-10-24
- G814JVR.322, 2025-10-01
The system produces a large set of ACPI BIOS errors on every boot. I have
isolated multiple reproducible namespace conflicts in the firmware ACPI
tables and reproduced them independently with upstream ACPICA iasl 20260408.
The most visible boot errors include:
ACPI BIOS Error (bug): Could not resolve symbol
[\_SB.PC00.I2C1.TPL1], AE_NOT_FOUND
ACPI BIOS Error (bug): Could not resolve symbol
[\_SB.PC00.I2C3.TPL1], AE_NOT_FOUND
and duplicate objects for every XHCI RHUB port:
\_SB.PC00.XHCI.RHUB.HS01._UPC
\_SB.PC00.XHCI.RHUB.HS01._PLD
...
HS01 through HS14
SS01 through SS10
all failing with AE_ALREADY_EXISTS.
Additional firmware errors include unresolved LPCB.SEN2, missing WMI WQ00,
and \_TZ.THRM being unresolved while evaluating \_SB.IETM._OSC.
I upgraded the machine from BIOS 320 to the current BIOS 322. The same ACPI
errors remain.
I captured the full ACPI table sets before and after the BIOS upgrade and
compared them. The SSDTs directly implicated in these failures are
byte-for-byte identical between BIOS 320 and BIOS 322, including:
- ssdt1.dat (DPTF / thermal-related table)
- ssdt7.dat (_ASUS_ RplSBTbt)
- ssdt10.dat (_ASUS_ TbtTypeC)
- ssdt11.dat (_ASUS_ UsbCTabl)
- ssdt12.dat (INTEL xh_rplsb)
- DMAR
BIOS 322 did change the DSDT and several other tables, so it was a real
firmware-table update, but the implicated SSDTs were not updated.
I then built upstream ACPICA 20260408 and reproduced the namespace conflicts
outside the running kernel.
XHCI collision isolation:
DSDT + ssdt12.dat (INTEL xh_rplsb)
fails immediately with:
Firmware Error (ACPI): Failure creating named object
[\_SB.PC00.XHCI.RHUB.HS01._UPC], AE_ALREADY_EXISTS
This is the same error emitted by the running Ubuntu kernel.
For comparison:
- DSDT + ssdt10 (TbtTypeC): succeeds
- DSDT + ssdt11 (UsbCTabl): succeeds
- ssdt10 + ssdt11: succeeds
- ssdt10 + ssdt12: succeeds
- ssdt11 + ssdt12: succeeds
Therefore the XHCI collision is specifically between the DSDT and the
INTEL xh_rplsb SSDT, not between the ASUS Type-C tables.
There is a second independent namespace collision:
ssdt5.dat (SaSsdt)
ssdt7.dat (_ASUS_ RplSBTbt)
Both combinations:
target=ssdt5 external=ssdt7
target=ssdt7 external=ssdt5
fail with:
Failure creating named object
[\_SB.PC00.PEG1.PEGP._S0W], AE_ALREADY_EXISTS
The complete BIOS-322 table set also fails ACPICA 20260408 disassembly on
that same PEGP._S0W object.
The extracted AML further shows that the DSDT and INTEL xh_rplsb table
provide overlapping XHCI RHUB port _UPC/_PLD definitions rather than the
tables being mutually exclusive.
This demonstrates an internally conflicting ACPI namespace supplied by the
G814JVR firmware and reproducible with both the ACPICA version in the Ubuntu
kernel and upstream ACPICA 20260408.
There is a separate runtime xHCI/USB failure being tracked in Ubuntu bug
#2163551. That incident involved an xHCI Host System Error and an IOMMU/DMAR
DMA-read fault for 00:14.0. Because these ACPI errors concern the same XHCI
controller namespace, they may be relevant platform context, but I am NOT
claiming that the ACPI namespace defect has been proven to cause the runtime
xHCI failure.
Please advise whether this should be handled with a kernel ACPI quirk/table
override or escalated to ASUS/firmware vendor, and whether any additional
ACPI table analysis is useful.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-29-generic 7.0.0-29.29
ProcVersionSignature: Ubuntu 7.0.0-29.29-generic 7.0.12
Uname: Linux 7.0.0-29-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 14 22:06:34 2026
IwDevWlo1Link: Not connected.
MachineType: ASUSTeK COMPUTER INC. ROG Strix G18 G814JVR_G814JVR
ProcFB:
0 i915drmfb
1 nvidia-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-29-generic root=ZFS=UbuntuZFS/root
ro quiet splash
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-06-05 (70 days ago)
dmi.bios.date: 10/01/2025
dmi.bios.release: 5.27
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: G814JVR.322
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: G814JVR
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.ec.firmware.release: 0.49
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrG814JVR.322:bd10/01/2025:br5.27:efr0.49:svnASUSTeKCOMPUTERINC.:pnROGStrixG18G814JVR_G814JVR:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG814JVR:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:pfaROGStrixG18:
dmi.product.family: ROG Strix G18
dmi.product.name: ROG Strix G18 G814JVR_G814JVR
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Attachment added: "raw acpi data"
https://bugs.launchpad.net/bugs/2163555/+attachment/5992324/+files/fafnir-acpi.zip
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https://bugs.launchpad.net/bugs/2163555
Title:
[ASUS ROG Strix G18 G814JVR] BIOS 320/322 expose conflicting ACPI
namespace: duplicate XHCI _UPC/_PLD and PEGP._S0W definitions
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