Hello, I found the following in dmesg during a system installation. I have not tried "acpi_osi=Linux" and will not do until you can give me a good explanation why I should, or point me to some good documentation about what changes are made and what result I should expect. [ 0.423679] ACPI: EC: Look up EC in DSDT [ 0.427244] ACPI: BIOS _OSI(Linux) query ignored [ 0.427246] ACPI: DMI System Vendor: Dell Computer Corporation [ 0.427247] ACPI: DMI Product Name: PowerEdge 860 [ 0.427248] ACPI: DMI Product Version: [ 0.427249] ACPI: DMI Board Name: 0KM697 [ 0.427251] ACPI: DMI BIOS Vendor: Dell Computer Corporation [ 0.427252] ACPI: DMI BIOS Date: 10/04/2007 [ 0.427253] ACPI: Please send DMI info above to linux-acpi@xxxxxxxxxxxxxxx [ 0.427255] ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@xxxxxxxxxxxxxxx Regards Anders Häggström -- 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