From mboxrd@z Thu Jan 1 00:00:00 1970 From: Antonino Daplas Subject: Re: Some questions Date: 12 Mar 2003 06:51:43 +0800 Sender: linux-fbdev-devel-admin@lists.sourceforge.net Message-ID: <1047422558.1128.120.camel@localhost.localdomain> References: <1047407816 .1013.182.camel@localhost.localdomain> <3E6E4D9A.7060003@winischhofer.net> <1047419056.1100.26.camel@localhost.localdomain> <3E6E61C6.2000503@winischhofer.net> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Received: from pine.compass.com.ph ([202.70.96.37]) by sc8-sf-list1.sourceforge.net with smtp (Exim 3.31-VA-mm2 #1 (Debian)) id 18sse1-00013y-00 for ; Tue, 11 Mar 2003 14:54:50 -0800 In-Reply-To: <3E6E61C6.2000503@winischhofer.net> 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="us-ascii" To: Thomas Winischhofer Cc: James Simmons , Geert Uytterhoeven , Linux Fbdev development list On Wed, 2003-03-12 at 06:23, Thomas Winischhofer wrote: > > > > I actually prefer #3, and I already have working code for this. We can > > also make this driver switchable (ie, drivers that are not affected by X > > can disable this, and only drivers that are affected such as the riva, > > aty, radeon, etc can turn this on). > > What exactly is a "trusted" console? > By default, the pid of each vt is -1. When X loads, it installs its own VT (ie vt7), which in that case the pid of that particular vt == X's pid. We can check this pid, and if switching from a vt with pid == -1, we can safely assume that the hardware state is still sane, and if not, assume the hardware state is undefined. Tony ------------------------------------------------------- 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