[Bug 221800] HP ProBook 445 G9: keyboard backlight hotkey no longer works after upgrade to Linux 7.1.4

[email protected] Tue, 28 Jul 2026 07:31:06 +0000
Newsgroups org.kernel.vger.platform-driver-x86
Message-ID <[email protected]/>
https://bugzilla.kernel.org/show_bug.cgi?id=221800

The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) changed:

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--- Comment #1 from The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) ---
Thx for the report. Be aware that this report might reach the right people
here, but it might not, as the root of the problem is vague (could be input,
platform, or graphics drivers -- and even something else). To find the root of
the problem three things would be good:

* please attach dmesg from 7.1.3 and 7.1.4 directly (not in an archive, this is
to much or a hassle for some and bears risks, too)
* Does the same problem happen with 7.2-rc5
* Would be great if you could git bisect to find the change that broke things:
https://docs.kernel.org/admin-guide/bug-bisect.html

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