On 01/12/2016 08:07 AM, Henrique de Moraes Holschuh wrote: > On Mon, Jan 11, 2016, at 19:12, Johannes Stezenbach wrote: >> I can confirm this, my x230 has both. FWIW, BIOS hotkey >> Fn+Space cycles through off, dim backlight, full backlight >> and full thinklight. /sys/class/leds/tpacpi::thinklight/brightness >> can be read (showing either 0 or 255) but writes are ignored. >> Dito for /proc/acpi/ibm/light. > > We likely need to integrate better (future work) the new backlight > control with the thinklight control and the firmware interface in the > x230. > > Is the ACPI AML for fn+space readable enough, or is it trapping directly > into SMM? Because if it interacts with the traditional higher-level > ACPI AML we already use to talk to the thinklight (and now to the > backlight), it should be relatively easy to fix the driver to better > support the x230. I looked through the DSDT and SSDT AML on the T430 (which also has both a keyboard backlight and ThinkLight) and couldn't deduce which method was being invoked for Fn+Space or an analog to MLCG/MLCS for the ThinkLight. However, that may be due to my inexperience interpreting AML. I'll keep looking/learning. I've posted the files online if anyone else has time/interest to take a look: https://kevinlocke.name/misc/t430-acpi/ Best regards, Kevin ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
