What is gxfb?¶
This is a graphics framebuffer driver for AMD Geode GX2 based processors.
Advantages:
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 :-)
Disadvantages:
graphic mode is slower than text mode...
How to use it?¶
Switching modes is done using gxfb.mode_option=<resolution>... boot parameter or using fbset program.
See modedb default video mode support for more information on modedb resolutions.
X11¶
XF68_FBDev should generally work fine, but it is non-accelerated.
Configuration¶
You can pass kernel command line options to gxfb with gxfb.<option>. For example, gxfb.mode_option=800x600@75. Accepted options:
| mode_option | specify the video mode. Of the form <x>x<y>[-<bpp>][@<refresh>] | 
| vram | size of video ram (normally auto-detected) | 
| vt_switch | enable vt switching during suspend/resume. The vt switch is slow, but harmless. | 
Andres Salomon <dilinger@debian.org>