[Bug 73252] [Baytrail-M] brightness can't be adjusted: no ASLE interrupt code

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73252

--- Comment #17 from EvaWang <evawang at linpus.com> ---
Created attachment 99939
  --> https://bugs.freedesktop.org/attachment.cgi?id=99939&action=edit
dmesg with drm.debug=0xe and removed loglevel=0

when press the brightness hotkey, it shows ideapad_laptop: Unkown event：15
ls /sys/class/backlight
> acpi_video0  intel_backlight

echo value to acpi_video0/brightness, brightness no change.(this is used for
OS.)
echo value to intel_backlight/brightness, brightness can be modified.

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