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 4CC49383323 for ; Mon, 11 May 2026 22:29:37 +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=1778538577; cv=none; b=DAZi+DsvsZ4gYxO0jSvrwKJcG4irBVC1EMDY54vIa41jj1IXIRsCLcoynJKpI90nwpdkbGcmH9zKFP1uDu/+lALpdGvz4FAs014vziZHl+c4CLkeFd81q/xOTvbYV9JUEiMzRcpC9bDJCDNAMObDd4jrqz9Ehqqw+PSCqC29aTQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778538577; c=relaxed/simple; bh=1VXpp22FZdGmquW1s1Ejhfc5U8WgPtTRnSVsPug9oWw=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=BF7vesVuOJUb2m7qQ2QNrTLBQcR+uZzS63eJ1Y6T8qHz9tJOqk3KJ3Yr99hkLlGKKni3/RaK4NDiTQFuzBrPpdk+d4tuetIdhEUPz13XwwsTXw9KH8F5FnSIMmZPDK6KcqupYVjc5ExWckORPZcRrEiNG/vtJh91763tVLPLoJk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=a5xdBZNC; 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="a5xdBZNC" Received: by smtp.kernel.org (Postfix) with ESMTPS id 2806DC2BCB0 for ; Mon, 11 May 2026 22:29:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778538577; bh=1VXpp22FZdGmquW1s1Ejhfc5U8WgPtTRnSVsPug9oWw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=a5xdBZNCu2ecqMYZaB3Y8D3f0p8arlIPwTzAeOMaKEYTx6tjGfa6R+1/fR50FnZDn GCCw5OnDeVz9ERYbEWdabFAknGNDYN6MJoZRbF+TvoYlE310AiwuqWEp38uhEeFf3e NbScakOf25lEeSISxu/BPSDu5RjjZQlud/Sp1/qPa5R31KGFRyey9uzy1sTDNl1YZw nYYZoQZwYMTb4IXNgLmi4dl/iyV0SPA2/dFC0M7W6H+xbipB9SKcR9gQmm+G4Imans X3cKaMl8JfmefnVoEBRkKzJIm2QvqWt1gKjiJrIRzPLQMyJtvrkkZvP0Q0nMSRp9aN buRqTSekpCh2g== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 166CFC4160E; Mon, 11 May 2026 22:29:37 +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: Mon, 11 May 2026 22:29:36 +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: floquimaurice@gmail.com 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 #7 from floquimaurice@gmail.com --- Hi Hans, I added acpi_backlight=3Dnative nvidia_wmi_ec_backlight.force=3D1 (and nvidia.NVreg_EnableBacklightHandler=3D0) to my kernel command line. Here are the folders that appeared in /sys/class/backlight/: intel_backlight (max_brightness: 192000) nvidia_0 (max_brightness: 100) nvidia_wmi_ec_backlight (max_brightness: 100) I tried echoing different values into the brightness file for each of these three folders. The commands were accepted without any errors, but the physi= cal screen brightness did not change at all. I am just reporting the facts here. Let me know if you need me to run any o= ther specific commands or tests! --=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.=