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 4D7BAC433F5 for ; Mon, 1 Nov 2021 20:33:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 31E7760F42 for ; Mon, 1 Nov 2021 20:33:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229712AbhKAUg2 (ORCPT ); Mon, 1 Nov 2021 16:36:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:47186 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229560AbhKAUg1 (ORCPT ); Mon, 1 Nov 2021 16:36:27 -0400 Received: by mail.kernel.org (Postfix) with ESMTPS id 1097060296 for ; Mon, 1 Nov 2021 20:33:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1635798834; bh=HkcoCOzQgVlzIlXcYDksjP8o7kDfsKZ6EnSqjJxtx/g=; h=From:To:Subject:Date:In-Reply-To:References:From; b=CbAf2UGLqGWXY9kJYZ4yPtbYWJA7e+KKrjPCqH6lTofNpjujC/42u0uaMi8nUPoS6 jjBkS9xRedwma6slRX2izYhxEJfGevsHdmHprfiUJdgdodnObnTC7sNn3D0cJsUyLD alhaNi05Prn5dervizzFkjDxr9uCedBRgYznp1II23Obd/rpImviG9LqdVDRbU8KyM sVLWfj1hCVwKg8MSQi9nkM/nxQrEZIIFKs3YmU4EAzhYqR3aXUGQBsXKMdaiRtvtM4 TQ7m9fxMrGg0vcvMg6GyikNnVUFDKrjlauxIHHXjrrr+0xMaTAM43fsr6RVqTg8ZmB 0Tq55pjRlhAdw== From: bugzilla-daemon@bugzilla.kernel.org To: platform-driver-x86@vger.kernel.org Subject: [Bug 214899] ideapad-laptop: platform backlight device not working Date: Mon, 01 Nov 2021 20:33:53 +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 #3 from Johannes P (johannes.penssel@gmail.com) --- I'm specifying my command line via kernel config, so for some reason, it sh= ows up in a separate message somewhat late in dmesg: [ 0.017237] Kernel command line: crypt_root=3DUUID=3D2cf18008-b55c-4f5f-926b-5f92a588348a root=3DUUID=3Dc890d077-9357-4996-94a3-811d6f477c89 i915.enable_guc=3D2 iwlwifi.power_save=3D1 iwlmvm.power_scheme=3D3 snd-hda-intel.power_save_controller=3D1 acpi_backlight=3Dvendor Possibly of note as well is that I am able to write custom values into /sys/class/backlight/ideapad/actual_brightness, which none of the other interfaces allows.=20 ls -la /sys/class/backlight (with acpi_backlight=3Dvideo) total 0 drwxr-xr-x 2 root root 0 Nov 1 21:28 . drwxr-xr-x 79 root root 0 Nov 1 21:28 .. lrwxrwxrwx 1 root root 0 Nov 1 21:28 acpi_video0 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 lrwxrwxrwx 1 root root 0 Nov 1 21:28 acpi_video1 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video1 lrwxrwxrwx 1 root root 0 Nov 1 21:28 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight I am afraid to report that booting with acpi_backlight=3Dvideo did not help= with the brightness keys :( --=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.=