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fbset !!!fbset NAME SYNOPSIS DESCRIPTION OPTIONS EXAMPLE FILES SEE ALSO AUTHORS ---- !!NAME fbset - show and modify frame buffer device settings !!SYNOPSIS __fbset__ [[''options''] [[''mode''] !!DESCRIPTION __This documentation is out of date!!__ __fbset__ is a system utility to show or change the settings of the frame buffer device.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''''n'' is the number of the used frame buffer device. __fbset__ uses its 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). !!OPTIONS If no option is given, __fbset__ will display the current frame buffer settings. General options: __--help__, __-h__ display 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 the 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 about 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''''-g__ ''640 400 640 400 4'' __-match__ 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''''-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 generated 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 displayed 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 horizontal frequency specification differs. Note that this option may not be supported 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 vertically !!EXAMPLE 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'' !!FILES ''/dev/fb* /etc/fb.modes'' !!SEE ALSO fb.modes(5), fbdev(4) !!AUTHORS Geert Uytterhoeven Roman Zippel man files ----
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