From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?iso-8859-1?Q?Ville_Syrj=E4l=E4?= Subject: Re: Reading the EDID block for x86 machines Date: Wed, 12 Mar 2003 14:10:22 +0200 Sender: linux-fbdev-devel-admin@lists.sourceforge.net Message-ID: <20030312141022.A6984@sci.fi> References: <1047386934.1113.35.camel@localhost.localdomain> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: Received: from kura.mail.jippii.net ([195.197.172.113]) by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 18t52Q-0002fr-00 for ; Wed, 12 Mar 2003 04:08:50 -0800 Received: from simpukka.saunalahti.fi (simpukka.saunalahti.fi [195.74.0.20]) by kura.mail.jippii.net (Postfix) with ESMTP id F218E2483F0 for ; Wed, 12 Mar 2003 14:08:46 +0200 (EET) Received: (from syrjala@localhost) by simpukka.saunalahti.fi (8.8.5/8.8.3) id OAA09322 for linux-fbdev-devel@lists.sourceforge.net; Wed, 12 Mar 2003 14:10:22 +0200 (EET) In-Reply-To: <1047386934.1113.35.camel@localhost.localdomain>; from adaplas@pol.net on Tue, Mar 11, 2003 at 08:49:46PM +0800 Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="iso-8859-1" To: Linux Fbdev development list On Tue, Mar 11, 2003 at 08:49:46PM +0800, Antonino Daplas wrote: > Hi, >=20 > I was wondering how to get the EDID block, and my first thought was to > implement DDC. But it is tricky to implement, Forgive my ignorance but why is it tricky? As I understand it DDC1 only involves reading from the monitor or does EDID require something more? Reading stuff from my monitor via /dev/i2c works fine with matroxfb. I just tried this and I can see my monitors model in the returned data but parse-edid doesn't understand the data so I'm not sure it's the EDID. Also the BIOS solution will fail when someone decides to change their monitor. This got me thinking that with a real DDC solution would it be feasible to have the driver re-read the EDID periodically and/or on mode switch to prevent using bad modes? --=20 Ville Syrj=E4l=E4 syrjala@sci.fi http://www.sci.fi/~syrjala/ ------------------------------------------------------- This SF.net email is sponsored by:Crypto Challenge is now open! Get cracking and register here for some mind boggling fun and the chance of winning an Apple iPod: http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0031en