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 AA70F32BF41 for ; Sun, 10 May 2026 15:20:38 +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=1778426438; cv=none; b=o8kwvzcJ07ao2IOtTr/kqowchh8S7CBSupQ22hcXXdk2jQ4znTSwX/QhuINZwJOdlJpTc66aLBP/JzZ21jV27eY+5Lf+hVgP+zJFr8Z154oVot5XwAoL8qUCdVPYjCnXHSFN43CA4mD/wkY0wqVTtd+mONyQCH6gg9cayNaNt4A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778426438; c=relaxed/simple; bh=1JMlRIpwMigqeokq8q51Auq6bWy6gqxv92d5cHLartk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=I37EM5N3wF66PnMsk73Z8SQU08Lr0iKKa9grBI7JNRwNyelPt0JJWBTTPSuIdT+qgjblSplwuQMEP/ZL14roWbgr8NJd1yk88s55u1Lf8WbRZFX1zftTRX8ODw6wm5EaSml0oteh0iX9/HMkgeVoK888nQZ8dIaL+UkRB/KT0S8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iv2/HNN1; 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="iv2/HNN1" Received: by smtp.kernel.org (Postfix) with ESMTPS id 4B070C2BCB8 for ; Sun, 10 May 2026 15:20:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778426438; bh=1JMlRIpwMigqeokq8q51Auq6bWy6gqxv92d5cHLartk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=iv2/HNN1T6rNWLrXH1qH6ypmMKsDwYEXi7Ommopa7Ti0/iN62fIQroKwfYb21cIJj lTaJummgDQElDifGkwz5iha9BFjrC6mYIu9pFmIVCh4nx4/dyyjbHc0tG7zDR4yYoE Kz1lxgXIv7C8TP/LCFinQU0XTWb+5ln3bfPrxE4EWo7bb54ajxPqB4Kiw5FG0BQzEv NrGpBi7HGBF7MUR4nR12fi6NL0OY1nJ6bw7vwrSxEy/UzFB3ui6SyIfbT0LNV5myQ6 RBcsVnjNZc+K5PckF1HYLwN2PAPJs8eH77bMLbgxUCJFTkoBCfeKIjP5xtoJ732RgB 6TLVspxDNt2+g== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 386B5C433E1; Sun, 10 May 2026 15:20:38 +0000 (UTC) From: bugzilla-daemon@kernel.org To: platform-driver-x86@vger.kernel.org Subject: [Bug 221430] nvidia_wmi_ec_backlight: brightness writes silently dropped on HP OMEN 16 (2025) Date: Sun, 10 May 2026 15:20:38 +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: hansg@kernel.org 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=3D221430 --- Comment #6 from Hans de Goede (hansg@kernel.org) --- Hmm, can you try adding the following to your kernel commandline: acpi_backlight=3Dnative nvidia_wmi_ec_backlight.force=3D1 That should give you both nvidia_wmi_ec and native (possibly multiple nativ= e) entries under /sys/class/backlight and then try echoing values in the 0 - max_brightness range to all the /sys/class/backlight/*/brightness attributes and see if that does something? Note the max_brightness variable= can differ quite a bit between different backlight interfaces and can be found = by doing: cat /sys/class/backlight//max_brightness --=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.=