From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aaron Lu Subject: Re: [PATCH] acpi: bus: handle power manageable but no _PSC/_PRx case Date: Fri, 07 Sep 2012 22:32:25 +0800 Message-ID: <504A0579.3000109@intel.com> References: <1346053126-7646-1-git-send-email-aaron.lu@intel.com> <201209062353.34517.rjw@sisk.pl> <20120907003513.GA1419@mint-spring.sh.intel.com> <201209071346.01900.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mga01.intel.com ([192.55.52.88]:17140 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932400Ab2IGOcn (ORCPT ); Fri, 7 Sep 2012 10:32:43 -0400 In-Reply-To: <201209071346.01900.rjw@sisk.pl> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" Cc: Len Brown , linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, Aaron Lu On 09/07/2012 07:46 PM, Rafael J. Wysocki wrote: >> Yes, on a test system, when I try to put a device into D3 cold and ACPI >> will complain that I can't due to its parent is in a even lower power >> state UNKNOWN(255), this parent device is power manageable but has no >> _PSC and _PRx defined. > > Perhaps we can force _PS0 for such devices to start with, so that we know > for sure that the initial state is D0? Sounds good, I'll update the patch, thanks for the advice. -Aaron