From owner-freebsd-stable@FreeBSD.ORG Tue Apr 28 10:11:36 2015 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 466A98D4 for ; Tue, 28 Apr 2015 10:11:36 +0000 (UTC) Received: from smtp.smtpout.orange.fr (smtp11.smtpout.orange.fr [80.12.242.133]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "Bizanga Labs SMTP Client Certificate", Issuer "Bizanga Labs CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id BD4DD162F for ; Tue, 28 Apr 2015 10:11:34 +0000 (UTC) Received: from localhost ([83.205.11.192]) by mwinf5d34 with ME id MNBX1q00E48cfiB03NBX36; Tue, 28 Apr 2015 12:11:32 +0200 X-ME-Helo: localhost X-ME-Date: Tue, 28 Apr 2015 12:11:32 +0200 X-ME-IP: 83.205.11.192 Message-ID: <553F5CD2.5020604@orange.fr> Date: Tue, 28 Apr 2015 12:11:30 +0200 From: Claude Buisson User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: stable@freebsd.org, current@freebsd.org Subject: VT+KVM: is there a way to disable video output on a given connector ? Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Apr 2015 10:11:36 -0000 Hello, I have an old Dell Inspirao 9300 with a Radeon video card, which I use to do some tests. This computer has a screen (1920x1200) in very bad state, so I use it with an external display (1920x1080), switching to the external by a special key combination (Fn+F8). This works OK when the video is in alphanumeric mode, that is with syscons. But with the video in graphics mode, both screens are used. Under X, the output to the internal screen may be suppressed with xrandr. But with vt I have not found any documented tunable/sysctl to achieve the same effect (I already use the kern.vt.fb.default_mode tunable to force the resolution). Thanks for your attention, CBu