What is lxfb?

This is a graphics framebuffer driver for AMD Geode LX based processors.


  • No need to use AMD's VSA code (or other VESA emulation layer) in the BIOS.

  • It provides a nice large console (128 cols + 48 lines with 1024x768) without using tiny, unreadable fonts.

  • You can run XF68_FBDev on top of /dev/fb0

  • Most important: boot logo :-)


  • graphic mode is slower than text mode...

How to use it?

Switching modes is done using lxfb.mode_option=<resolution>... boot parameter or using fbset program.

See modedb default video mode support for more information on modedb resolutions.


XF68_FBDev should generally work fine, but it is non-accelerated.


You can pass kernel command line options to lxfb with lxfb.<option>. For example, lxfb.mode_option=800x600@75. Accepted options:


specify the video mode. Of the form <x>x<y>[-<bpp>][@<refresh>]


size of video ram (normally auto-detected)


enable vt switching during suspend/resume. The vt switch is slow, but harmless.

Andres Salomon <dilinger@debian.org>