2.6.23-rc5-git1 hangs here, just before EC initialization. Pressing the power button briefly makes it continue, then the EC gets detected twice: ACPI: bus type pci registered PCI: Using configuration type 1 ------------------ hangs here, press power button -------------------- ACPI: EC: Look up EC in DSDT ACPI: EC: GPE = 0x10, I/O: command/status = 0x66, data = 0x62 ACPI: System BIOS is requesting _OSI(Linux) ACPI: If "acpi_osi=Linux" works better, Please send dmidecode to linux-acpi@xxxxxxxxxxxxxxx ACPI: Interpreter enabled ACPI: (supports S0 S3) ACPI: Using IOAPIC for interrupt routing ACPI: EC: GPE = 0x10, I/O: command/status = 0x66, data = 0x62 ACPI: PCI Root Bridge [PCI0] (0000:00) PCI: Transparent bridge - 0000:00:10.0 ... System is an HP TX1000 notebook with AMD Turion X2 processor, running the x86_64 kernel. (And acpi_osi="Linux" doesn't seem to make any difference.) - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html