[Bug 214899] ideapad-laptop: brightness hotkeys not working

[bugzilla-daemon@kernel.org]

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

Philipp Jungkamp (p.jungkamp@gmx.net) changed:

           What    |Removed                     |Added
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                 CC|                            |p.jungkamp@gmx.net

--- Comment #43 from Philipp Jungkamp (p.jungkamp@gmx.net) ---
I can report that this also fixes the brightness keys on the 'Lenovo Yoga 9
14IAP7'.

I was just trying to trace the ACPI events on Windows when I found this thread
while browsing the Mailing list in the train.

(In reply to Johannes Penßel from comment #15)
> 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!

My device has multiple of these open app keys (Support, Favorite App, Virtual
Background, Sound Profile, Dark Mode Toggle), I just wrote a short WMI driver
to get them working. Have you figured out how to get these working for
yourself? I presume the open application key you were talking about is the
"star with an S inside", which is also present on my device.

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