Sorry, I accidentally sent the email, too early. I was about to point out,
that somebody seems to have found a way to turn the ThinkLight on, on
modern Thinkpads, through EC:
https://www.reddit.com/r/thinkpad/comments/5f87sg/hint_blinking_the_thinklight_with_software_on_new/
Perhaps, this is a method that could also be considered for the
thinkpad_acpii driver.
On Wed, Apr 19, 2017 at 2:24 PM, Sebastian Noack <sebastian.no...@gmail.com>
wrote:
> 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.
>
>
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