From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1Rp1q0-00020q-R0 for garchives@archives.gentoo.org; Sun, 22 Jan 2012 18:08:21 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 1E692E075B; Sun, 22 Jan 2012 18:08:07 +0000 (UTC) Received: from mail-gx0-f181.google.com (mail-gx0-f181.google.com [209.85.161.181]) by pigeon.gentoo.org (Postfix) with ESMTP id 41741E0429 for ; Sun, 22 Jan 2012 18:07:00 +0000 (UTC) Received: by ggnk1 with SMTP id k1so333134ggn.40 for ; Sun, 22 Jan 2012 10:06:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=XzaRe7zZopIcNcIbAWTtIc0szPunDUgFnnmzKzJjEs8=; b=wN5ouaXjZfqbjX404/gUdLcQd642iIZw6/hFkU6VMpfZu9cvjW3LPZHYGnS7JxYNWb GLH5ZM3u8FBz2MPoAHQciQq4p2jRV+WLUggottyULKqdG81BWje/v42dFuS+hP5JMesw qdz2GrBGLWzRG1EwIiz1V4l467okx+iV7BSNw= Received: by 10.101.145.29 with SMTP id x29mr2208491ann.4.1327255619666; Sun, 22 Jan 2012 10:06:59 -0800 (PST) Received: from [192.168.2.101] ([71.20.203.55]) by mx.google.com with ESMTPS id h29sm194318ann.16.2012.01.22.10.06.57 (version=SSLv3 cipher=OTHER); Sun, 22 Jan 2012 10:06:58 -0800 (PST) Message-ID: <4F1C504D.6010105@gmail.com> Date: Sun, 22 Jan 2012 13:07:09 -0500 From: "G.Wolfe Woodbury" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0) Gecko/20120107 Thunderbird/9.0 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] KVM problems - anyone know _why_ it happens? References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Archives-Salt: 51bd57e7-d02f-4c31-8eb7-f98db81e3784 X-Archives-Hash: 0b1d9431815063693238564aeea9c6cb On 01/22/2012 12:42 PM, Mark Knecht wrote: > I played a bit with get-edid | parse-edid. Logically that stuff even > working says the VGA monitor cable is bidirectional. I started > wondering if the KVM messes up the data coming back, or what else > might be going on. Thanks for the ideas, Mark Many of the cheap KVM models do, indeed, mess up the EDID data coming from the monitor. I suspect that this is from old design specs that have too much pull-up/pull-down on the EDID lead since the boxen haven been re-engineered for newer, higher resolution and higher speed monitors. I have had problems specifically with the BELKIN KVMs. It may also be that the video drivers for Linux are just enough different (necessarily) from the MSFT drivers to not reliably sense the EDID return signals. I did as others suggested and tried several until I found one that worked. Sometimes a slightly different model/serial/part no KVM from the same manufacturer would/wouldn't work. -- G.Wolfe Woodbury redwolfe@gmail.com