1.\" 2.\" Copyright (c) 1999 3.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 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 as 11.\" the first lines of this file unmodified. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man4/vga.4,v 1.7.2.10 2002/12/20 18:03:05 trhodes Exp $ 28.\" 29.Dd December 14, 2009 30.Dt VGA 4 31.Os 32.Sh NAME 33.Nm vga , 34.Nm vesa 35.Nd generic video card interface 36.Sh SYNOPSIS 37.Cd "options VESA" 38.Cd "options VESA_DEBUG=N" 39.Cd "options VGA_ALT_SEQACCESS" 40.Cd "options VGA_KEEP_POWERON_MODE" 41.Cd "options VGA_NO_FONT_LOADING" 42.Cd "options VGA_NO_MODE_CHANGE" 43.Cd "options VGA_DEBUG=N" 44.Cd "options VGA_WIDTH90" 45.Cd "device vga0 at isa? port ?" 46.Sh DESCRIPTION 47The 48.Nm 49driver is a generic video card driver which provides access to 50video cards. 51This driver is required for the console driver 52.Xr syscons 4 . 53The console driver will call the 54.Nm 55driver to manipulate video hardware (changing video modes, loading font, etc). 56.Pp 57The 58.Nm 59driver supports the standard VGA video cards. 60In addition, the driver can utilize the VESA BIOS Extension if the video card 61supports it. 62VESA support can either be statically included in the kernel 63or can be loaded as a separate module. 64.Pp 65In order to statically link the VESA support into the kernel, the 66.Dv VESA 67option (see below) must be defined in the kernel configuration file. 68.Pp 69The 70.Nm vesa 71module can be dynamically loaded into the kernel using 72.Xr kldload 8 . 73.Sh DRIVER CONFIGURATION 74.Ss Kernel Configuration Options 75The following kernel configuration options 76(see 77.Xr config 8 ) 78can be used to control the 79.Nm 80driver. 81These options provide compatibility with certain VGA cards. 82.Bl -tag -width ".Dv VGA_KEEP_POWERON_MODE" 83.It Dv VGA_ALT_SEQACCESS 84You may want to try this option if the mouse pointer is not drawn correctly 85or the font does not seem to be loaded properly on the VGA card. 86However, it may cause flicker on some systems. 87.It Dv VGA_DEBUG=N 88Set the VGA support debug level to 89.Fa N . 90The default value is 0, which suppresses all debugging output. 91A value of 2 gives maximum verbosity. 92.It Dv VGA_KEEP_POWERON_MODE 93This option keeps the initial mode's register settings for switching back 94to it from another mode. 95.It Dv VGA_WIDTH90 96This option enables 90 column modes: 90x25, 90x30, 90x43, 90x50, 90x60. 97These modes are not always supported by the video card and the display. 98It is highly likely that LCD display cannot work with these modes. 99.El 100.Pp 101The following options will remove some features from the 102.Nm 103driver and save kernel memory. 104.Bl -tag -width ".Dv VGA_KEEP_POWERON_MODE" 105.It Dv VGA_NO_FONT_LOADING 106This option removes font loading from the driver. 107Note that if you use this option and 108still wish to use the mouse on the console then you must also use the 109.Dv SC_ALT_MOUSE_IMAGE 110option. 111See 112.Xr syscons 4 . 113.It Dv VGA_NO_MODE_CHANGE 114This option prevents the driver from changing video modes. 115.El 116.Pp 117The following options add optional features to the driver. 118.Bl -tag -width ".Dv VGA_KEEP_POWERON_MODE" 119.It Dv VESA 120Add VESA BIOS Extension support to the driver. 121If the VGA card has the VESA BIOS Extension 1.2 or later, 122this option will utilize it to switch to high resolution modes. 123.It Dv VESA_DEBUG=N 124Set the VESA support debug level to 125.Fa N . 126The default value is 0, which suppresses all debugging output. 127A value of 2 gives maximum verbosity. 128.El 129.Sh EXAMPLES 130Your kernel configuration should normally have: 131.Pp 132.D1 Cd "device vga0 at isa? port ?" 133.Pp 134The following line should be included in the kernel configuration file 135in order to enable the VESA BIOS Extension support. 136.Pp 137.D1 Cd "options VESA" 138.Pp 139If you do not want VESA support included in the kernel, but 140want to use occasionally, do not add the 141.Dv VESA 142option. 143And load the 144.Nm vesa 145module as desired: 146.Pp 147.Dl kldload vesa 148.Sh SEE ALSO 149.Xr vgl 3 , 150.Xr syscons 4 , 151.Xr config 8 , 152.Xr kldload 8 , 153.Xr kldunload 8 154.Sh STANDARDS 155.Rs 156.%A "Apple, IBM, Motorola" 157.%T "Common Hardware Reference Platform: I/O Device Reference" 158.%B "Appendix A: VGA Programming Model" 159.%P "p. 195" 160.%O "ftp://ftp.software.ibm.com/rs6000/technology/spec/chrp/" 161.Re 162.Pp 163.Rs 164.%T "VESA BIOS Extension (VBE)" 165.%A Video Electronics Standards Association 166.Re 167.Sh HISTORY 168The 169.Nm 170driver first appeared in 171.Fx 3.1 . 172.Sh AUTHORS 173.An -nosplit 174The 175.Nm 176driver was written by 177.An S\(/oren Schmidt Aq sos@FreeBSD.org 178and 179.An Kazutaka Yokota Aq yokota@FreeBSD.org . 180This manual page was written by 181.An Kazutaka Yokota . 182