[Bug 296261] Brightness keys doesn't work after loading i915kms on ThinkPad T420/X230 with Coreboot

[email protected] Sun, 02 Aug 2026 22:05:39 +0000
Newsgroups gmane.os.freebsd.devel.multimedia
Message-ID <[email protected]/bugzilla/>
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D296261

--- Comment #4 from Aeryn <[email protected]> ---
I tried both devd configuration options on the ThinkPad T480 and it doesn't
work. As I mentioned before, brightness switching before loading i915kms wi=
th
only efifb works without any configuration, but after loading i915kms it
breaks. IIRC, on this same ThinkPad without libreboot on FreeBSD 14.X,
brightness switching worked without any configuration with i915kms loaded, =
so
it's most likely a bug in FreeBSD related to coreboot/libreboot, because ot=
her
BSDs and Linux don't have this issue.

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