Thanks for the dmidecode output. Do you notice any functional difference when booting with "acpi_osi=Linux" (default for 2.6.22 and earlier) vs. "acpi_osi=!Linux" (default for 2.6.23 and later) Also, please send me the output from acpidump. thanks, -Len ps If you don't have acpidump, you can get it from pmtools here: http://www.lesswatts.org/projects/acpi/utilities.php --- System Information Manufacturer: Hewlett-Packard Product Name: HP Pavilion tx 1000 (RY588EA#ABU) Version: Rev 1 Serial Number: CNF7080LY2 UUID: 434E4637-3038-304C-5932-001636E9EB04 Wake-up Type: Power Switch SKU Number: Family: 103C_5335KV Handle 0x0002, DMI type 2, 8 bytes Base Board Information Manufacturer: Quanta Product Name: 30BF - 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