Hi, Thanks for the thinkpad_acpi driver. I've been a beneficiary of it for a while now. I'm trying to get the two "i" Thinkpad leds[1] on a Thinkpad Edge 13 AMD[2] to be controllable via the thinkpad_acpi module. I can control the screen brightness (/sys/class/backlight/acpi_video0/brightness) fine, and I have recompiled thinkpad_acpi.c with CONFIG_THINKPAD_ACPI_UNSAFE_LEDS and a few extra printk's to verify that it's initializing leds 0-12 ok: Sep 26 16:17:18 edge kernel: thinkpad_acpi: http://ibm-acpi.sf.net/ Sep 26 16:17:18 edge kernel: thinkpad_acpi: ThinkPad BIOS 6ZET32WW (1.19 ), EC 6ZHT26WW-1.171000 Sep 26 16:17:18 edge kernel: thinkpad_acpi: Lenovo ThinkPad Edge, model 0197RW3 Sep 26 16:17:18 edge kernel: thinkpad_acpi: detected a 8-level brightness capable ThinkPad Sep 26 16:17:18 edge kernel: thinkpad_acpi: radio switch found; radios are enabled Sep 26 16:17:18 edge kernel: thinkpad_acpi: possible tablet mode switch found; ThinkPad in laptop mode Sep 26 16:17:18 edge kernel: thinkpad_acpi: asked for hotkey mask 0x04018070, but firmware forced it to 0x00018070 Sep 26 16:17:18 edge kernel: thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked Sep 26 16:17:18 edge kernel: thinkpad_acpi: TPACPI_LED_NEW entered Sep 26 16:17:18 edge kernel: thinkpad_acpi: init led 0... Sep 26 16:17:18 edge kernel: thinkpad_acpi: ok [...] ...sysfs shows: $ ls /sys/devices/platform/thinkpad_acpi/leds tpacpi::power/ tpacpi::standby/ tpacpi::thinklight/ tpacpi::thinkvantage/ If I do this: echo 0 > /sys/devices/platform/thinkpad_acpi/leds/tpacpi\:\:thinkvantage/brightness ...it has no effect on any of the LEDs' brightness. But if I do this: echo 432434223132132 > /sys/devices/platform/thinkpad_acpi/leds/tpacpi\:\:dock_active/brightness ...then both LEDs go off. Any number from 0 (to I assume the limit of unsigned int or something) causes the LEDs to go off. No number causes them to go on. If the LEDs are off and I echo any number from 0 upwards to any of: /sys/devices/platform/thinkpad_acpi/leds/tpacpi\:\:dock_batt/brightness /sys/devices/platform/thinkpad_acpi/leds/tpacpi\:\:dock_status1/brightness /sys/devices/platform/thinkpad_acpi/leds/tpacpi\:\:dock_status2/brightness ...they both come back on. I once got them to pulse (not too fast but not too slow), but that was mixed in with closing and opening the lid, plugging & unplugging the power cable, so I'm not sure how it happened. I haven't been able to get them to turn off / on independently. I'd like to help make this behaviour a bit more sane, and I've had a look at led_set_status(...)[3] but I'm not sure where to start (led_led_arg1? ACPI tables somewhere?). Does anyone have an idea what I should look at to get to be able to control: a) the LEDs brightness levels b) the LEDs independently ...? Thanks, Martin 1. http://www.thinkpads.com/wp-content/gallery/lenovo-thinkpad-edge-13-review/lenovo-thinkpad-edge-13-both-logos.jpg 2. http://www.thinkwiki.org/wiki/Category:Edge_13%22 3. http://repo.or.cz/w/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git/blob/release/2.6.35:/drivers/platform/x86/thinkpad_acpi.c#l5103
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