From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E767A416D04 for ; Fri, 5 Jun 2026 17:33:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780680797; cv=none; b=Ph9UrNHbOVutwT/qJbzkG8MH9x8m00gblQchVkzpiui7ip2z89LBcjZSlGqsQCKwso4xCpImou0xpt4i8npyYbc8cW7nam37DxeaybMdcyYdKSbz150bibMREU+5c5RiO3BtIp0CBa0kNsKX1NCGk2IUkGjmCY4lbqGBs8MwFa0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780680797; c=relaxed/simple; bh=qO7Gn1bixQWzi8KwZMKEOoViOuIUGJzkTf/6czEAs88=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=Ljb7wU68mPOUMDUljV7iyxyBURT3IrHAWZ1vmAhuVNOYsJsu8FbvJoHncDsKT/tIg5sMvUWxYytBYv2KB0pyP3X+t2qejNgY4FSnNZ8H6t8lsnuynI86q/wv2a/65ajnCOGP/JgXLfBUvTx73Egs+5P+mTJ4lFai+QxTaYE7SZQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LCLzrRSU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LCLzrRSU" Received: by smtp.kernel.org (Postfix) with ESMTPS id 82E97C2BCB4 for ; Fri, 5 Jun 2026 17:33:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1780680796; bh=qO7Gn1bixQWzi8KwZMKEOoViOuIUGJzkTf/6czEAs88=; h=From:To:Subject:Date:In-Reply-To:References:From; b=LCLzrRSUW46b3UEab9aiIeAUR7pUk5zt2GakTm4H1oL6ph1+eJY+nVYHkohqasB+x deByG94U7wAFo7ZJN+2xMcEazN9TPdDLvqAf5f9/x551W614dpXOFlmIwKvGzBBXUz OPbpoDsxCTwPIl+DCyE2mNhB9HzFQEemY3TX641G9izf/IdqCzSKwtFQFCNYQsB35X cM03kPfG4+VQmDDzHyXFlEOZoLR3bhOWzdw2Y1QxyeeoN9Qvi9sebnIYR2+EOh6Qm5 QXq8uTbDwr+B12sSaI5n5xSTz9poQJlW+8MMAWD86o+XM/ExGcxHJzSill28rNwiHN IYb4ZzY3LMmHA== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 62B58C3279F; Fri, 5 Jun 2026 17:33:16 +0000 (UTC) From: bugzilla-daemon@kernel.org To: platform-driver-x86@vger.kernel.org Subject: [Bug 221583] Lenovo 82KU: keyboard backlight works via Fn+Space but no kbd_backlight LED device exposed Date: Fri, 05 Jun 2026 17:33:16 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_platform_x86@kernel-bugs.osdl.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: Platform_x86 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: george.stafilidis@proton.me X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_platform_x86@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221583 --- Comment #16 from George (george.stafilidis@proton.me) --- 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. 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. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=