From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [RFC][PATCH] swsusp: warn about USB devices in documentation Date: Mon, 20 Feb 2006 17:37:07 +0100 Message-ID: <20060220163707.GA19156@elf.ucw.cz> References: <20060220103424.GA16042@elf.ucw.cz> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0038689611853230943==" Return-path: In-Reply-To: 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: Alan Stern Cc: Linux PM List-Id: linux-pm@vger.kernel.org --===============0038689611853230943== Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi! > > > Can you update the patch to fix this paragraph? > > > > Well, this is talking about suspend-to-disk... That is expected to > > power down machine, without providing USB bus power. If box > > suspends-to-disk and leaves USB up, something is wrong with the > > machine. > > Oh, sorry, I didn't realize that. > > Isn't there an ACPI mode that powers down most things (including RAM) but > is able to respond to wakeup events? I can't remember the mode's name, > except that it's almost certainly "S" followed by some meaningless number > followed by some unhelpful word. :-) Since USB plug/unplug is potentially > a wakeup event, such a mode must provide suspend power to the USB > controller. Maybe S4 does that, but I'm not sure... > Does swsusp still support these not-completely-powered-off modes? Yes. echo platform > /sys/power/disk. Pavel -- Web maintainer for suspend.sf.net (www.sf.net/projects/suspend) wanted... --===============0038689611853230943== Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --===============0038689611853230943==--