acpi_osi="!Windows 2012"
Does this kernel bug sound similar to what you are experiencing?
]]>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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