Hi, I'm trying to use the acpi_hp but no luck: acpi_wmi0: <ACPI-WMI mapping> on acpi0 acpi_hp0: <HP ACPI-WMI Mapping> on acpi0 acpi_hp0: WMI device does not provide the HP BIOS GUID device_attach: acpi_hp0 attach returned 22 What's the problem with my computer ? I need this driver to switch on my wireless card. Thanks in advance, Nicolas.