On Tue, Jan 12, 2016 at 02:07:10PM -0200, 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 have no clue about ACPI, do you have some hints how to get the info you want? I found this: sudo acpidump > acpidata.dat acpixtract -sSSDT acpidata.dat acpixtract -sDSDT acpidata.dat iasl -d DSDT.dat SSDT*.dat ..and then look at the .dsl files that contain the AML assembler. But what to look out for? PS: failed to mention my x230 kernel was still 4.2.x in case it matters Thanks, Johannes -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
