linux/Documentation/fb/lxfb.rst
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   1=============
   2What is lxfb?
   3=============
   4
   5.. [This file is cloned from VesaFB/aty128fb]
   6
   7
   8This is a graphics framebuffer driver for AMD Geode LX based processors.
   9
  10Advantages:
  11
  12 * No need to use AMD's VSA code (or other VESA emulation layer) in the
  13   BIOS.
  14 * It provides a nice large console (128 cols + 48 lines with 1024x768)
  15   without using tiny, unreadable fonts.
  16 * You can run XF68_FBDev on top of /dev/fb0
  17 * Most important: boot logo :-)
  18
  19Disadvantages:
  20
  21 * graphic mode is slower than text mode...
  22
  23
  24How to use it?
  25==============
  26
  27Switching modes is done using  lxfb.mode_option=<resolution>... boot
  28parameter or using `fbset` program.
  29
  30See Documentation/fb/modedb.rst for more information on modedb
  31resolutions.
  32
  33
  34X11
  35===
  36
  37XF68_FBDev should generally work fine, but it is non-accelerated.
  38
  39
  40Configuration
  41=============
  42
  43You can pass kernel command line options to lxfb with lxfb.<option>.
  44For example, lxfb.mode_option=800x600@75.
  45Accepted options:
  46
  47================ ==================================================
  48mode_option      specify the video mode.  Of the form
  49                 <x>x<y>[-<bpp>][@<refresh>]
  50vram             size of video ram (normally auto-detected)
  51vt_switch        enable vt switching during suspend/resume.  The vt
  52                 switch is slow, but harmless.
  53================ ==================================================
  54
  55Andres Salomon <dilinger@debian.org>
  56