[Bug 221583] Lenovo 82KU: keyboard backlight works via Fn+Space but no kbd_backlight LED device exposed

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221583

--- Comment #17 from Rong Zhang (i@rong.moe) ---
(In reply to George from comment #13)
> I reinstalled Fedora on my laptop I somehow messed up what the power button
> does.

If acpi_listen can still see events from the power button, it's probably just a
configuration issue in GNOME.

(In reply to George from comment #15)
> Sorry for my poor responses. English is not my first language, so there were
> some things I didn't fully understand. I also used AI to help me with
> certain parts because of the language barrier

Well, you can ask me for more detailed explanations.

While AI is good at translating texts as is, things could go wrong when it
starts to explain them. Also, Qwen is not very good at these obscure issues, so
try not to push it too far.

> and because I haven't had much free time due to exams.

When I check Bugzilla, I usually take that as a casual pastime. In other words,
I'm not in a hurry to get your test results or feedback. You can take your
time. 

(In reply to George from comment #16)
> Also, regarding your question: when I manually wrote values to /dev/mem, I
> remember the software state cycling correctly through 0 (Off), 1 (Low), and
> 2 (High). However, the keyboard's physical backlight did not change.

Then the previous version of the DSDT code where "Off and Low worked physically
and the OSD appeared" (comment #12) is important. If possible, please attach it
in a reply.

> I'm going to start over from scratch and repeat the process more carefully,
> this time taking notes as I go instead of experimenting late at night and
> relying on memory.

Thanks.

Do experiments carefully, but keep a relaxed and casual attitude. You don't
need to do them overnight.

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