From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: suspended DRAM bridge Date: Mon, 01 Apr 2013 22:56:34 +0200 Message-ID: <35938665.ZFvDxnCU3l@vostro.rjw.lan> References: <5159BAC9.80700@fold.natur.cuni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7Bit Return-path: Received: from hydra.sisk.pl ([212.160.235.94]:49605 "EHLO hydra.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757445Ab3DAUtA (ORCPT ); Mon, 1 Apr 2013 16:49:00 -0400 In-Reply-To: <5159BAC9.80700@fold.natur.cuni.cz> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Martin Mokrejs Cc: Linux PM list On Monday, April 01, 2013 06:50:17 PM Martin Mokrejs wrote: > Hi Rafael, > I have a simple question. Why seems my DRAM controller suspended? I suppose that runtime PM is disabled for that device and therefore runtime_status is meaningless. And really, that attribute is for *debugging* things by developers who know what they are looking for and not for random poking. Besides, this is a host bridge, not a DRAM controller. > Does it make any sense in a laptop computer? How could the laptop work at all? I suppose it wouldn't work if the PCI host bridge were suspended. At least it couldn't access memory and the PCI bus then. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.