With 2.6.22, did you notice any functional difference with "acpi_osi=!Linux"?
(or since the default changed at 2.6.23, with 2.6.23 or later do you notice any difference with "acpi_osi=Linux"?) Please send me the output from acpidump. If you don't have acpidump, you can get it from pmtools here: http://www.lesswatts.org/projects/acpi/utilities.php thanks, -Len --- BIOS Information Vendor: COMPAL Version: 1.12 Release Date: 08/29/2007 Address: 0xE6100 Runtime Size: 106240 bytes ROM Size: 1024 kB Characteristics: ... BIOS Revision: 49.49 Firmware Revision: 49.49 Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: - Product Name: N/A Version: N/A Serial Number: N/A UUID: D1E07F78-0869-11DC-AB91-0016D4DB90E0 Wake-up Type: Power Switch SKU Number: Compal Family: Compal Handle 0x0002, DMI type 2, 8 bytes Base Board Information Manufacturer: - Product Name: IFL91 Version: IFT00 Serial Number: N/A - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html