1 .\" $NetBSD: drm.4,v 1.7 2009/05/12 08:16:46 wiz Exp $
3 .\" Copyright (c) 2007 Thomas Klausner
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26 .Dd September 13, 2013
31 .Nd Direct Rendering Manager (DRI kernel support)
34 .Tn Direct Rendering Manager
36 .Tn Direct Rendering Infrastructure
38 .Pa http://dri.freedesktop.org/ )
39 for supporting video acceleration.
40 For older chipsets it's used for 3d acceleration only, but newer chipsets
43 for 2d acceleration (XVideo, EXA) as well.
47 drivers provide support for the following chipsets:
48 .Bl -column -offset indent ".Sy ModuleXXX" ".Sy Kernel option" ".Sy Chipset"
49 .It Sy Module Ta Sy "Kernel option" Ta Sy Chipset
50 .It Pa i915kms.ko Ta n/a Ta Intel i915, i945, i965, G3x, G4x
51 .It Pa radeon.ko Ta Cd radeondrm Ta Radeon
56 will take care of loading the appropriate modules and it is not necessary to
59 or the kernel configuration to enable
67 do a pretty good job of figuring out the right configuration on their own,
70 file at all is usually the best advice.
73 is preferred, DRI must be enabled:
81 With KMS, DRI is always enabled since the
85 .\"In order to use two graphics cards (an on-board and another
86 .\"AGP/PCI/PCIe card) with DRI, a
90 .\"has to be created using
95 acceleration fails to initialize with a
96 .Dq contigmalloc_map: failed size...
97 error in dmesg, the reserve of memory for DMA ran out early and should
98 be increased to a sufficiently high value by setting the
103 variable of the same name is provided for obtaining its current value.
105 Debugging output can be enabled and disabled by setting the
113 DRM was first available for Linux.
114 Subsequently Eric Anholt ported the DRM kernel modules to
117 Disable AIGLX if necessary
119 .Bd -literal -offset indent
120 Section "ServerFlags"
124 .\"Section "Extensions"
125 .\" Option "Composite" "Disable"
129 .Cd options DRM_DEBUG
130 can slow DRI down a lot, disable it once