From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AEDD3C433F5 for ; Tue, 2 Nov 2021 22:15:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 948B060F70 for ; Tue, 2 Nov 2021 22:15:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230175AbhKBWR6 (ORCPT ); Tue, 2 Nov 2021 18:17:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:35728 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229900AbhKBWR4 (ORCPT ); Tue, 2 Nov 2021 18:17:56 -0400 Received: by mail.kernel.org (Postfix) with ESMTPS id 3C8A160F70 for ; Tue, 2 Nov 2021 22:15:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1635891321; bh=9eJnllGAEXVyCVV6lz3iHh/JOGo/yCrJNmMqB1jDEv0=; h=From:To:Subject:Date:In-Reply-To:References:From; b=up6mhZpy+/J0dICObPGSvUKtAXvdp9lizbCKIWB09ch0pEHsk2KuKumX7XI8ys79y lTFkXcYof4Qzqqsk8d0F9ZYOHk16/JAcr/kNvfGTMdaCoQDdndEkjs9iFWKSceKwzA bI/V35r8Y/+HoCILAax6ecztQbvYLwiJHvS4BpOwLwNmSLNLklk9xvKUu+AYGtGuR1 eRPVoy9o+SlfWAJez7mNdZnMyt1Za6EcnttF68KcL+J6jHDDFDQCGsoAQXfqYbawi+ 4h1p2Nb06N79JBdVu+GTga/aiBM6iZkSqt3zmwgXs0K7zp8qIDXeWA3P7bm/4q0aqP KEzSc4ucMm3jw== From: bugzilla-daemon@bugzilla.kernel.org To: platform-driver-x86@vger.kernel.org Subject: [Bug 214899] ideapad-laptop: platform backlight device not working Date: Tue, 02 Nov 2021 22:15:20 +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: johannes.penssel@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 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 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D214899 --- Comment #16 from Johannes P (johannes.penssel@gmail.com) --- (In reply to Andy Shevchenko from comment #12) > (In reply to Johannes P from comment #11) > > Still nothing but grave silence from the brightness keys though. >=20 > Which might be a sign that the key presses are handled by some > microcontroller (EC?) with a custom firmware and being delivered to the OS > in different way. It's also possible that the WMI can be used but these > events have to be enabled somehow (obviously with ACPI methods or so). This is something that came to my mind as well. The keyboard backlight on t= his machine works in a similar way: It seems to be entirely handled by the EC, because it is in no way exposed to the OS, but can be toggled at any time, = even during boot/shutdown/restart. --=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.=