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#1 2013-09-09 18:37:25

kageurufu
Member
Registered: 2013-04-01
Posts: 17

Lenovo Ideapad Y510p backlight issues, ideapad and intel_backlight

I would like to be able to use my keyboards fn+left/right to control backlight, but when pressed it merely pops up the brightness change popup on the desktop and does nothing.

I have been fighting with this for a few days, I have tried a whole bunch, and the closest I have to fully working is by including acpi_osi="Linux" and acpi_backlight=vendor in my grub config

This leads to /sys/class/backlight/{ideapad,intel_backlight} existing, but intel_backlight does nothing.

If I manually echo 1-5372 > /sys/class/backlight/intel_backlight/brightness, it works fine.

ideapad/brightness does nothing however, no dmesg, nothing in any log files I can find.

Is there a config way for me to set the laptop to use intel_backlight and ignore the existance of the ideapad backlight option, or how should I go about working on this?

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#2 2013-09-13 06:35:46

jrmrjnck
Member
From: USA
Registered: 2011-01-17
Posts: 32

Re: Lenovo Ideapad Y510p backlight issues, ideapad and intel_backlight

Have you tried

acpi_osi="!Windows 2012"

Does this kernel bug sound similar to what you are experiencing?

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#3 2013-09-13 06:37:07

WonderWoofy
Member
From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

Re: Lenovo Ideapad Y510p backlight issues, ideapad and intel_backlight

https://wiki.archlinux.org/index.php/Intel  <--Look, there's a wiki!

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