Booting 2.6.27-10 as Ubuntu 8.10 proposed installed it: [ 0.540741] ACPI: BIOS _OSI(Linux) query ignored [ 0.540744] ACPI: DMI System Vendor: LENOVO [ 0.540746] ACPI: DMI Product Name: 7449F9U [ 0.540748] ACPI: DMI Product Version: ThinkPad X200 Tablet [ 0.540750] ACPI: DMI Board Name: 7449F9U [ 0.540751] ACPI: DMI BIOS Vendor: LENOVO [ 0.540753] ACPI: DMI BIOS Date: 09/09/2008 [ 0.540755] ACPI: Please send DMI info above to linux-acpi@xxxxxxxxxxxxxxx [ 0.540757] ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@xxxxxxxxxxxxxxx After adding acpi_osi=Linux to boot command line: [ 0.540751] ACPI: BIOS _OSI(Linux) query honored via cmdline [ 0.540754] ACPI: DMI System Vendor: LENOVO [ 0.540755] ACPI: DMI Product Name: 7449F9U [ 0.540757] ACPI: DMI Product Version: ThinkPad X200 Tablet [ 0.540759] ACPI: DMI Board Name: 7449F9U [ 0.540761] ACPI: DMI BIOS Vendor: LENOVO [ 0.540763] ACPI: DMI BIOS Date: 09/09/2008 [ 0.540764] ACPI: Please send DMI info above to linux-acpi@xxxxxxxxxxxxxxx -- rec -- -- 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