I am trying to enable the LED mute button on T420, I found that echo '14 blink' >/proc/ibm/acpi/leds causes the mute button led to blink, so I added the following to static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { "tpacpt::mute_mic", and I am adding to the useful led quirk table: static const struct tpacpi_quirk led_useful_qtable[] __initconst = { TPACPI_Q_LNV('8', '3', 0xXXXX), /* T420 */ Where __id1 and __id2 are the bios id for this thinkpad, 83ET43WW, but I dont know how to figure out the value for __quirk. Can someone help me figure this out ? In the dsdt.dsl I find Method (LED, 2, NotSerialized) { Or (Arg0, Arg1, Local0) If (\H8DR) { Store (Local0, HLCL) } Else { \WBEC (0x0C, Local0) } } but not sure how to form the __quirk value from that. -- Manoj Iyer Ubuntu/Canonical Hardware Enablement ------------------------------------------------------------------------------ Enable your software for Intel(R) Active Management Technology to meet the growing manageability and security demands of your customers. Businesses are taking advantage of Intel(R) vPro (TM) technology - will your software be a part of the solution? Download the Intel(R) Manageability Checker today! http://p.sf.net/sfu/intel-dev2devmar _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel