linux:system:power-management:acpi
ACPI on Linux
ACPI is usually also implemented in the BIOS/Firmware. In case of buggy implementations it could conflict with Linux ACPI implementation, causing error in the journal. Apparently this is due to faulty communication between a PCI device, the motherboard, and the kernel.
There are three workarounds, which in all cases involve setting a kernel parameter (if you're using GRUB, here's how it's done):
pcie_aspm=
Forcibly enable or ignore PCIe Active State Power Management.
- off : Don't touch ASPM configuration at all. Leave any configuration done by firmware unchanged.
- force : Enable ASPM even on devices that claim not to support it. WARNING: Forcing ASPM on may cause system lockups.
pci=
- nomsi: disables Message Signaled Interrupts. I'm not sure exactly what this is, but adding this parameter disables USB devices… so no go.
- noaer : this shoots the messenger, so to speak. Errors still occur, but they aren't reported, and system logs keep normal proportions.
- nommconf I've only recently heard about this one. It disables Memory-Mapped PCI Configuration Space, and reverts to the traditional handling of configuration space.
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linux/system/power-management/acpi.txt · Last modified: by oscar
