From owner-freebsd-current@FreeBSD.ORG Fri Jan 30 07:36:40 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id ECA8F16A4CE; Fri, 30 Jan 2004 07:36:39 -0800 (PST) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2804443D2F; Fri, 30 Jan 2004 07:36:36 -0800 (PST) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.10/8.12.9) with ESMTP id i0UFaUET072245; Fri, 30 Jan 2004 08:36:30 -0700 (MST) (envelope-from imp@bsdimp.com) Date: Fri, 30 Jan 2004 08:36:14 -0700 (MST) Message-Id: <20040130.083614.75932761.imp@bsdimp.com> To: marks@ripe.net From: "M. Warner Losh" In-Reply-To: <20040130092529.GA725@laptop.6bone.nl> References: <20040129162023.GA42359@laptop.6bone.nl> <200401291132.54455.jhb@FreeBSD.org> <20040130092529.GA725@laptop.6bone.nl> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: current@freebsd.org cc: freebsd-acpi@jp.freebsd.org Subject: Re: API to turn off the display X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Jan 2004 15:36:40 -0000 In message: <20040130092529.GA725@laptop.6bone.nl> Mark Santcroos writes: : On Thu, Jan 29, 2004 at 11:32:54AM -0500, John Baldwin wrote: : > I read the spec yesterday, and what is supposed to happen is this: The : > display (LCD, CRT, etc.) is supposed to be powered down using DPMS. The : > actual adapter is then supposed to be powered down using either PCI or ACPI : > sleep states, and the adapter should not be powered down to a lower sleep : > state (like D3) w/o using DPMS to power the display down to at least that : > state first. This means that the kernel might need to grow a dummy vga : > driver of some sort and some simple dpms support for suspend/resume. : : I second this. : : Nate, can you put it on your acpi-todo list? The only problem with having a vga device for suspend/resume is that it will claim devices that drm wants to claim later and X won't work. I have about the simplest driver possible for vga in one of my trees, and found this to be a problem on my dell i8k. Warner