linux/Documentation/fb/gxfb.txt
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   1[This file is cloned from VesaFB/aty128fb]
   2
   3What is gxfb?
   4=================
   5
   6This is a graphics framebuffer driver for AMD Geode GX2 based processors.
   7
   8Advantages:
   9
  10 * No need to use AMD's VSA code (or other VESA emulation layer) in the
  11   BIOS.
  12 * It provides a nice large console (128 cols + 48 lines with 1024x768)
  13   without using tiny, unreadable fonts.
  14 * You can run XF68_FBDev on top of /dev/fb0
  15 * Most important: boot logo :-)
  16
  17Disadvantages:
  18
  19 * graphic mode is slower than text mode...
  20
  21
  22How to use it?
  23==============
  24
  25Switching modes is done using  gxfb.mode_option=<resolution>... boot
  26parameter or using `fbset' program.
  27
  28See Documentation/fb/modedb.txt for more information on modedb
  29resolutions.
  30
  31
  32X11
  33===
  34
  35XF68_FBDev should generally work fine, but it is non-accelerated.
  36
  37
  38Configuration
  39=============
  40
  41You can pass kernel command line options to gxfb with gxfb.<option>.
  42For example, gxfb.mode_option=800x600@75.
  43Accepted options:
  44
  45mode_option     - specify the video mode.  Of the form
  46                  <x>x<y>[-<bpp>][@<refresh>]
  47vram            - size of video ram (normally auto-detected)
  48vt_switch       - enable vt switching during suspend/resume.  The vt
  49                  switch is slow, but harmless.
  50
  51--
  52Andres Salomon <dilinger@debian.org>
  53
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