Added "acpi_osi=Linux" at my /boot/grub/menu.lst: kernel /boot/vmlinuz26 acpi_osi=Linux root=/dev/disk/by-uuid/58aa5616-bbe0-4f9f-a77c-ad44f158d16b ro Nothing seems different. DMI info: ACPI: DMI System Vendor: Olidata S.p.A. ACPI: DMI Product Name: Olidata ST3050 ACPI: DMI Product Version: 20 ACPI: DMI Board Name: L55RIx ACPI: DMI BIOS Vendor: Phoenix Technologies LTD. ACPI: DMI BIOS Date: 08/31/07 Regards, Nolberto -- 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