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--- linux:system:power-management:acpi [2025/09/22 15:44] – [ACPI on Linux] oscar
+++ linux:system:power-management:acpi [2025/09/22 15:51] (current) – oscar
@@ Line 5: / Line 5: @@
 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=off
+=== 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.
+=== pci= ===
+  * nomsi: disables Message Signaled Interrupts. I'm not sure exactly what this is, but adding this parameter disables USB devices... so no go.
-  * pci=noaer : this shoots the messenger, so to speak. Errors still occur, but they aren't reported, and system logs keep normal proportions.
+  * noaer : this shoots the messenger, so to speak. Errors still occur, but they aren't reported, and system logs keep normal proportions.
-  * pci=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.
+  * 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.