1.\" $NetBSD: drm.4,v 1.7 2009/05/12 08:16:46 wiz Exp $ 2.\" 3.\" Copyright (c) 2007 Thomas Klausner 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.Dd June 23, 2009 27.Dt DRM 4 28.Os 29.Sh NAME 30.Nm drm 31.Nd Direct Rendering Manager (DRI kernel support) 32.Sh SYNOPSIS 33.Cd device drm 34.Cd device i915drm 35.Cd device mach64drm 36.Cd device mgadrm 37.Cd device r128drm 38.Cd device radeondrm 39.Cd device savagedrm 40.Cd device sisdrm 41.Cd device tdfxdrm 42.\".Cd device viadrm 43.Pp 44.Cd options DRM_DEBUG 45.\".Cd options DRM_LINUX 46.Sh DESCRIPTION 47The 48.Tn Direct Rendering Manager 49is part of the 50.Tn Direct Rendering Infrastructure 51(see 52.Pa http://dri.freedesktop.org/ ) 53for supporting video acceleration. 54For older chipsets it's used for 3d acceleration only, but newer chipsets 55may require 56.Nm 57for 2d acceleration (XVideo, exa(4)) as well. 58.Pp 59The 60.Nm 61drivers provide support for the following chipsets: 62.Pp 63.Bl -tag -width XsavagedrmXXX -offset indent -compact 64.It i915drm 65Intel i915, i945, i965, G3x, G4x 66.It mach64drm 67Mach64 (3D Rage Pro, Rage) 68.It mgadrm 69Matrox G[24]00, G[45]50 70.It r128drm 71ATI Rage 128 72.It radeondrm 73ATI Radeon 74.It savagedrm 75S3 Savage 76.It sisdrm 77SiS 78.It tdfxdrm 793dfx (Voodoo) 80.\".It viadrm 81.\"VIA 82.El 83.Pp 84To make use of the driver: 85.Pp 86.Bl -bullet -compact 87.It 88The kernel must include 89.Xr agp 4 90.It 91.Xr Xorg 1 , 92MesaLib and the video driver to be used must be compiled with DRI support 93.It 94DRI must be enabled in the 95.Xr xorg.conf 5 96configuration file: 97.Bd -literal 98Section "DRI" 99 Group "wheel" 100 Mode 0660 101EndSection 102.Ed 103.El 104.Pp 105Debugging output can be enabled and disabled by setting the 106.Xr sysctl 8 107node 108.Ar hw.dri.debug . 109.Sh SEE ALSO 110.Xr Xorg 1 , 111.Xr agp 4 , 112.Xr exa 4 , 113.Xr xorg.conf 5 114.Sh HISTORY 115DRM was first available for Linux. 116Subsequently Eric Anholt ported the DRM kernel modules to 117.Fx . 118.Sh CAVEATS 119Disable AIGLX if necessary 120.Pq Pa xorg.conf : 121.Bd -literal -offset indent 122Section "ServerFlags" 123 Option "AIGLX" "off" 124EndSection 125 126Section "Extensions" 127 Option "Composite" "Disable" 128EndSection 129.Ed 130.Pp 131.Cd options DRM_DEBUG 132can slow DRI down a lot, disable it once 133.Nm 134works. 135