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 45FE3182B3 for ; Thu, 15 Feb 2024 09:37:21 +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=1707989842; cv=none; b=kjKs9Mt1ABS66wtLdyyXBzVgdm2Wwq9LisLJveLRwyo0CVtO/SL8mkxY0ovDsOOXtkmlm/ALs0TlrKrTx/QWYJNtMcv7GshF9Qog9vJbPh/ivNhAvh31FXpmno+EPF1ZkncwoMhAHdw7nJ16koHsc56JoCIE8b7kKcI2nFDAIjY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707989842; c=relaxed/simple; bh=KN1cFDuqCvpdJc9z3ae7sAHCTynNWJLmVpNzmTxnqjw=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=eT34GvmVETfh7HDZuRmssdDpEgr21+X207MAv8gR0rNEDjV8BbKmPmSkYmRXFQHvjz/4t5Mjhgwow9DSQOOZd9X36RPJ0pYRPU+IMQG08mfbG+uozxaAHH/Rh1ld23DgdxIlrt6hgVmBhTFCy6YpYgC9lWXckepwOirpB9UJVxI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=b5U56Izf; 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="b5U56Izf" Received: by smtp.kernel.org (Postfix) with ESMTPS id C9FD6C43143 for ; Thu, 15 Feb 2024 09:37:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707989841; bh=KN1cFDuqCvpdJc9z3ae7sAHCTynNWJLmVpNzmTxnqjw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=b5U56IzfdMbt5q7WM9/2rWmSJgeXyzeHV/aDip/JykGS3siraf6I6Ox1JTeyzdiC/ 5Yk6W9LEz47kdlZ9ja0Yk6PZGSbl8dxmOJXppVG5MB7EGXmrtxiPU3AAgEIBMfZPsh q+R1g7LZ4a53MahyASLWM4hnc5D4iumcYLIrRLD6j8bYgysyBRXvVYxIuHObAiOt8L 76/Q73hYjTytAMMUrpINuxETOt9bjJyTVhuTVFzOBYBnrW+YvRVpLiuuX/8nyNhq7n lIkjiq0Kn4mqj4nAL/9UMstacLC5Mp1TYRVjWdr6uzJcZ32liH605m51/xfUNyXJof T5Fi4ljuEt1tg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id AAFD7C53BD0; Thu, 15 Feb 2024 09:37:21 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 218465] Linux warning `usb: port power management may be unreliable` on Dell XPS 13 9360 Date: Thu, 15 Feb 2024 09:37:21 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mathias.nyman@linux.intel.com X-Bugzilla-Status: RESOLVED X-Bugzilla-Resolution: DUPLICATE X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.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: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D218465 --- Comment #5 from Mathias Nyman (mathias.nyman@linux.intel.com) --- This DELL machine has ACPI entries for USB ports that are not usable. These ports are supported by xHCI host hardware but are not internally or externally connected anywhere. They have _UPC (USB port capability) ACPI objects stating they are not connectable, and _PLD (Physical Location of Device) that just returns 0 for their group token group position. So all unusable USB2 and USB3 ports have similar _PLD entries, which then confuses Linux when trying to pair together USB2 and USB3 ports.=20 Linux could probably ignore printing any warning messages for ports that have _PLD entries but _UPC shows they are not connectable --=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.=