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sira

Member

Registered: 2023-02-14

Posts: 12

Lenovo Power Button Light

Hello everyone, I have an issue:
My laptop (Lenovo Thinkbook 15-iil) has a very bright power button light, and this very harm my eyes, I want a way to disable that!
thanks for your help

Trilby

Inspector Parrot

Registered: 2011-11-29

Posts: 30,342

Website

Re: Lenovo Power Button Light

Find it's brightness under /sys/class/leds, mine is at /sys/class/leds/tpacpi::power/brightness, then set this to zero to confirm it works:

# echo 0 > /sys/class/leds/tpacpi::power/brightness

If that works, you just need to make that automatic at boot up.  There are a few approaches for this, though I think a systemd-tmpfiles approach might be the currently most recommended.

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"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

sira

Member

Registered: 2023-02-14

Posts: 12

Re: Lenovo Power Button Light

Find it's brightness under /sys/class/leds, mine is at /sys/class/leds/tpacpi::power/brightness

I don't have tpacpi::power, it's for me:

ls /sys/class/leds/
input3::capslock  input3::numlock  input3::scrolllock  phy0-led

can be "phy0-led" for me??

Trilby

Inspector Parrot

Registered: 2011-11-29

Posts: 30,342

Website

Re: Lenovo Power Button Light

No, phy0-led is a network card indicator.  It seems your thinkbook isn't covered by the thinkpad module or any other default kernel modules.  There may be a third party module for it, or you might be able to find some other sys interface that covers it.  Check the following for candidates:

find -L /sys/class/ -maxdepth 4 -iname brightness

Of course there's also the simple low-tech solution of a bit of electrical tape.

Last edited by Trilby (2023-03-10 16:44:07)

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"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

sira

Member

Registered: 2023-02-14

Posts: 12

Re: Lenovo Power Button Light

here may be a third party module for it, or you might be able to find some other sys interface that covers it.  Check the following for candidates:

find -L /sys/class/ -maxdepth 4 -iname brightness | curl -F 'file=@-' 0x0.st

http://0x0.st/HiYm.txt

Of course there's also the simple low-tech solution of a bit of electrical tape.

I think I should go back to the same.