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From: Sebastian N. <seb...@gm...> - 2017-04-19 12:24:45
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On my X230 and X250, the ThinkLight can only be turned off, but not on, though /sys/class/leds/tpacpi::think/birghtness, /proc/acpi/ibm/light and /proc/acpi/ibm/cmos. Other users report the same problem (also mentioning the models X1 Carbon, T430, T530 and W530): http://linux-thinkpad.10952.n7.nabble.com/tpacpi-bug-in-tpacpi-thinklight-brightness-for-X1-Carbon-td20888.html https://bbs.archlinux.org/viewtopic.php?id=160252 https://marc.info/?l=ibm-acpi-devel&m=135232336026355 https://www.reddit.com/r/thinkpad/comments/189r7y/linux_users_does_turning_the_thinklight_on_via/ https://ubuntuforums.org/showthread.php?t=2185431 https://unix.stackexchange.com/questions/96666/pidgin-blinklight-not-working-with-thinkpad-acpi-t430 It seems something changed in the BIOS/ACPI when they added support for keyboard backlight. |
