[Bug 214899] ideapad-laptop: platform backlight device not working

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https://bugzilla.kernel.org/show_bug.cgi?id=214899

--- Comment #15 from Johannes P (johannes.penssel@xxxxxxxxx) ---
Unfortunately, your latest patch did not yield any results either. :(

In the meantime, I have discovered another peculiarity: the ACPI/WMI events
generated by this "open app" key are identical to the ones created by pressing
Fn + ESC. (i.e. toggling Fn lock) In fact, the WMI 0xd0 event is already
handled by ideapad driver in the ideapad_wmi_notify function. The only apparent
difference between pressing "open app" and pressing Fn + ESC is that the latter
also toggles the LED on the ESC key. This might be a firmware issue however, as
this key does nothing in Windows either.

Thanks a lot for your support!

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