Heya, With Matthew Garrett's help, I've been able to detect and change the keyboard backlight on my laptop using software only. The laptop has 3 levels of backlight (with one of them being 'off') and can, under Linux, only be controlled using Fn+Space key combination. I wanted to control the keyboard backlight in software to toggle it on/off along with the screen, as happens on Macs (those running Linux anyway). This is the user-space code poking the EC to change the backlight level: https://gist.github.com/hadess/6847281 Matthew checked out the DSDT and said that bits 4-7 of the DWORD passed to MLCS should be able to change the backlight level (so MLCG, modify with the backlight level, and MLCS). Is somebody interested in implementing the support for this? I'm happy testing changes, but my time is limited, and I don't really know how to attack the problem (the driver scares me a bit ;). UPower has user-space support for the keyboard backlight on Macs, so it would be useful if the user-space interface matched: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/hwmon/applesmc.c#n1025 Cheers ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60134791&iu=/4140/ostg.clktrk _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
