https://bugzilla.kernel.org/show_bug.cgi?id=218789
Mike Seo (mike....@lge.com) changed:
What |Removed |Added
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CC| |mike....@lge.com
--- Comment #18 from Mike Seo (mike....@lge.com) ---
Dear Rafael J. Wysocki,
I'm working for LGE.
I received an issue that some LG laptops cannot adjust display brightness by Fn
+ {F2,F3} key in the kernel image your patch applied.
As VitliiT's opinion as mentions in Comment 17, using ec->handle can fix my
issue.
I've got one of debian's kernel-source
packge(https://packages.debian.org/bookworm-backports/linux-source-6.9).
I also found out your patch applied in the source and reproduced my issue 100%.
(Your patch:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.43&id=96a0e06dfe0c5909dbd1f791f297f2f470e974ad)
When my issue happened, below bios error log was shown.
"ACPI BIOS Error (bug): Could not resolve symbol [\_TZ.FN00._OFF], AE_NOT_FOUND
(20230628/psargs-330)"
This error message never displayed when I reverted your patch.
I mean that your patch can cause another side-effect issues.
It's better the manufacturer, Lenovo, fix "No handler for Region [ECSI] " issue
by correcting their UEFI, BIOS or EC firmware rather than changing linux kernel
source, in my opinion.
Or some quirks can be needed for this kind of ACPI error.
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