https://bugzilla.kernel.org/show_bug.cgi?id=220767
Bug ID: 220767
Summary: ACPI: PCI resource conflict on ASRock X870E Taichi
(BIOS 3.50)
Product: ACPI
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: Config-Tables
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 308922
--> https://bugzilla.kernel.org/attachment.cgi?id=308922&action=edit
Included lspci.txt, bootlog.txt and acpidump.txt
Hello Kernel Team,
I am experiencing a persistent PCI resource conflict on an ASRock X870E Taichi
mainboard. The bug is reproducible on two identical machines, both running BIOS
3.50.
The error appears during boot in dmesg (see attached bootlog.txt):
---
pci 0000:00:02.1: bridge window [mem 0xdca00000-0xdd4fffff]: can't claim;
address conflict with AMDIF031:00 [mem 0xdcf00000-0xdcf00fff]
---
This initial conflict triggers a cascade of "can't claim; no compatible bridge
window" errors for many subordinate devices, including USB and SATA
controllers.
Hardware & Kernel:
* Mainboard: ASRock X870E Taichi (BIOS 3.50)
* Kernel: 6.17.7 (CachyOS)
* (Full DMI, lspci, and acpidump are attached)
What has been tried:
1. Loading UEFI defaults: No change, error persists.
2. Booting with "pci=nocrs": This results in a hard system freeze (kernel
panic related to xHCI controllers and memory management), proving the kernel
cannot ignore the ACPI tables on this hardware.
This bug does not seem to affect distributions with older kernels (like
Ubuntu), which likely carry a quirk for this. The newer 6.17 kernel seems to
expose this BIOS bug.
Could a quirk be added for this mainboard to resolve the ACPI resource
conflict?
Thank you.
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