Re: [PATCH v2] platform/x86: asus-wmi: Add keyboard backlight toggle support

[Benjamin Berg]

Hi,

On Thu, 2018-05-24 at 16:33 +0800, Chris Chiu wrote:
> I've made my change to set the brightness level directly in the
> driver, but the
> OSD doesn't show correctly correspond to the level value. The brightness shows
> OK in /sys/class/led/xxxx/brighness but the OSD always shows level 0. I thought
> GNOME should read the brightness from /sys before showing OSD?

Sorry for the late response.

There is a special mechanism to report that the HW changed the
brightness. This works using the "brightness_hw_changed" sysfs
attribute. So you will need to set the LED_BRIGHT_HW_CHANGED flag on
the LED and then call led_classdev_notify_brightness_hw_changed to make
it work.

Userspace should correctly show the OSD when this is done.

Benjamin

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