From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [patch/rft 2.6.17-rc2] swsusp resume must not device_suspend() Date: Thu, 27 Apr 2006 08:20:09 +0000 Message-ID: <20060427082009.GD2376@ucw.cz> References: <200604251730.34377.david-b@pacbell.net> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============47145278601716312==" Return-path: In-Reply-To: <200604251730.34377.david-b@pacbell.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.osdl.org Errors-To: linux-pm-bounces@lists.osdl.org To: David Brownell Cc: Andrew Morton , linux-pm@lists.osdl.org, Nigel Cunningham , linux-usb-devel@lists.sourceforge.net List-Id: linux-pm@vger.kernel.org --===============47145278601716312== Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi! > > At the least it would depend on > > the particular state. For instance, I've got a PCI USB controller card > > (VIA) on which the UHCI controllers support only D0 and D3cold. And > > (although I'm not certain of this) I may have seen a report from someone > > whose system _does_ retain power during swsusp. IIRC it was a powerbook > > of some sort. > > I know that Macintoshes are good about maintaining power during STR, and > suspect that some systems running Apple's OS will do so during "hibernate"; > they have a more complete/powerful power management framework than Linux. > > But last time the topic came up, I recall Pavel saying he'd never seen or > heard of hardware that did things like that with swsusp, even when using > "platform" (or "firmware") suspend mode. I have seen such macine since that. NAPA seems to keep usb powered even when off. I think I'll just use it as cellphone charger :-). Pavel -- Thanks, Sharp! --===============47145278601716312== Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --===============47145278601716312==--