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RedHat 9 (Linux i386) - man page for fbset (redhat section 8)

fbset(8)			     Linux frame buffer utils				 fbset(8)

       fbset - show and modify frame buffer device settings

       fbset [options] [mode]

       This documentation is out of date!!

       fbset  is  a system utility to show or change the settings of the frame buffer device. The
       frame buffer device provides a simple and unique interface to access  different	kinds  of
       graphic displays.

       Frame  buffer devices are accessed via special device nodes located in the /dev directory.
       The naming scheme for these nodes is always fb<n>, where n is the number of the used frame
       buffer device.

       fbset  uses  an	own  video mode database located in /etc/fb.modes. An unlimited number of
       video modes can be defined in this database. For further information see fb.modes(5).

       If no option is given, fbset will display the current frame buffer settings.

       General options:

	      --help, -h
		     display an usage information

	      --now, -n
		     change the video mode immediately. If no frame buffer device  is  given  via
		     -fb , then this option is activated by default

	      --show, -s
		     display  the  video  mode	settings. This is default if no further option or
		     only a frame buffer device via -fb is given

	      --info, -i
		     display all available frame buffer information

	      --verbose, -v
		     display information what fbset is currently doing

	      --version, -V
		     display the version information about fbset

	      --xfree86, -x
		     display the timing information as it's needed by XFree86

       Frame buffer device nodes:

	      -fb <device>
		     device gives the frame buffer device node. If no device via  -fb  is  given,
		     /dev/fb0 is used

	      Video mode database:

	      -db <file>
		     set  an alternative video mode database file (default is /etc/fb.modes), see
		     also fb.modes(5)

       Display geometry:

	      -xres <value>
		     set visible horizontal resolution (in pixels)

	      -yres <value>
		     set visible vertical resolution (in pixels)

	      -vxres <value>
		     set virtual horizontal resolution (in pixels)

	      -vyres <value>
		     set virtual vertical resolution (in pixels)

	      -depth <value>
		     set display depth (in bits per pixel)

	      --geometry, -g ...
		     set all geometry parameters at once  in  the  order  <xres>  <yres>  <vxres>
		     <vyres> <depth>, e.g.  -g 640 400 640 400 4

		     make the physical resolution match the virtual resolution

       Display timings:

	      -pixclock <value>
		     set  the  length  of  one pixel (in picoseconds). Note that the frame buffer
		     device may only support some pixel lengths

	      -left <value>
		     set left margin (in pixels)

	      -right <value>
		     set right margin (in pixels)

	      -upper <value>
		     set upper margin (in pixel lines)

	      -lower <value>
		     set lower margin (in pixel lines)

	      -hslen <value>
		     set horizontal sync length (in pixels)

	      -vslen <value>
		     set vertical sync length (in pixel lines)

	      --timings, -t ...
		     set all timing parameters at once in the  order  <pixclock>  <left>  <right>
		     <upper> <lower> <hslen> <vslen>, e.g.  -g 35242 64 96 35 12 112 2

       Display flags:

	      -hsync {low|high}
		     set the horizontal sync polarity

	      -vsync {low|high}
		     set the vertical sync polarity

	      -csync {low|high}
		     set the composite sync polarity

	      -extsync {false|true}
		     enable  or disable external resync. If enabled the sync timings are not gen-
		     erated by the frame buffer device and must be provided  externally  instead.
		     Note that this option may not be supported by every frame buffer device

	      -bcast {false|true}
		     enable or disable broadcast modes. If enabled the frame buffer generates the
		     exact timings for several broadcast modes (e.g. PAL or NTSC). Note that this
		     option may not be supported by every frame buffer device

	      -laced {false|true}
		     enable  or  disable  interlace.  If enabled the display will be split in two
		     frames, each frame contains only even and odd lines respectively. These  two
		     frames  will  be displayed alternating, this way twice the lines can be dis-
		     played and the vertical frequency for the monitor stays the  same,  but  the
		     visible vertical frequency gets halved

	      -double {false|true}
		     enable  or disable doublescan. If enabled every line will be displayed twice
		     and this way the horizontal frequency can easily be  doubled,  so	that  the
		     same resolution can be displayed on different monitors, even if the horizon-
		     tal frequency specification differs. Note that this option may not  be  sup-
		     ported by every frame buffer device

       Display positioning:

	      -move {left|right|up|down}
		     move the visible part of the display in the specified direction

	      -step <value>
		     set  step	size for display positioning (in pixels or pixel lines), if -step
		     is not given display will be moved 8 pixels horizontally or  2  pixel  lines

       To set the used video mode for X insert the following in rc.local:

	      fbset -fb /dev/fb0 vga

       and make the used frame buffer device known to X:

	      export FRAMEBUFFER=/dev/fb0


       fb.modes(5), fbdev(4)

       Geert Uytterhoeven <Geert.Uytterhoeven@cs.kuleuven.ac.be>

       Roman Zippel <zippel@fh-brandenburg.de>
	      man files

local					    July 1998					 fbset(8)

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