From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Smirl Subject: Re: Re: Kernel Summit presentation Date: Thu, 28 Jul 2005 09:21:35 -0400 Message-ID: <9e473391050728062177dab6db@mail.gmail.com> References: <200507281445.25521.patrakov@ums.usu.ru> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1Dy8KT-0007F1-PQ for linux-fbdev-devel@lists.sourceforge.net; Thu, 28 Jul 2005 06:21:41 -0700 Received: from wproxy.gmail.com ([64.233.184.200]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1Dy8KT-0005wg-CN for linux-fbdev-devel@lists.sourceforge.net; Thu, 28 Jul 2005 06:21:41 -0700 Received: by wproxy.gmail.com with SMTP id i3so415336wra for ; Thu, 28 Jul 2005 06:21:35 -0700 (PDT) In-Reply-To: <200507281445.25521.patrakov@ums.usu.ru> Content-Disposition: inline Sender: linux-fbdev-devel-admin@lists.sourceforge.net Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: List-Post: List-Help: List-Subscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" To: linux-fbdev-devel@lists.sourceforge.net On 7/28/05, Alexander E. Patrakov wrote: > Jon Smirl wrote: >=20 > > I attached the slides from my kernel summit presentation. The major > > change is that Linus does not want a new VT state. Instead we should > > open a new VT, switch it to VT_GRAPHICS, and then refuse to > > acknowledge VT swap requests. Dave Airlie did another presentation on > > mode setting and suspend/resume. > > > > The simple overview: goal is to get rid of the current VT swap system > > but replace it with something that looks just like it. To do this the > > console is split into two halves. > > > > 1) kernel console - it is as simple as possible and always guaranteed > > to work. It is simpler than current fbconsole. It automatically uses > > whatever mode is set on the monitor. There is only one kernel console > > - no VTs. > > > > 2) user console - implements your normal VTs. Fully accelerated, > > supports Unicode, etc. > > > > No one was really against restructuring the consoles. There was > > support for a console that always works even when something like X is > > running. >=20 > I am really interested in this, and want to help (with code, once > architectural issues are solved). But there is a question: >=20 > How should applications that currently rely upon a kernel VT system being > present (e.g. Xorg, MPlayer, SDL) be modified? (I mean, is there any prop= osed > API for hunting for a free userspace VC?) It depends on how the app is implemented. If the app directly messes with the hardware it will have to be significantly changed. For example there is a new Xserver under development that plays by the new rules. The old Xorg server will not work once you enter the new state. This is probably true for SDL too. The main goal of the new system is to weed out old apps that directly mess with the hardware. These apps will need to be rewritten to work in the new model. The fbdev, DRM and OpenGL/EGL APIs will be available in the new system. Standalone SDL would easily port to OpenGL/EGL. EGL is an OpenGL extension that allows mode setting and screen control. Using OpenGL/EGL will hide the changes from you. The new system allows two users, each logged on to a separate head of a single card. You can't running an old app that messes with the hardware in this case. The old app would kill both users. This is a complicated change in the VT system. It will probably be several years before everything is transitioned. >=20 > -- > Alexander E. Patrakov >=20 >=20 > ------------------------------------------------------- > SF.Net email is Sponsored by the Better Software Conference & EXPO Septem= ber > 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices > Agile & Plan-Driven Development * Managing Projects & Teams * Testing & Q= A > Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf > _______________________________________________ > Linux-fbdev-devel mailing list > Linux-fbdev-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linux-fbdev-devel >=20 --=20 Jon Smirl jonsmirl@gmail.com ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf