gxfb.rst 1.3 KB

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