>i was trying to switch my ultra5 from the default high res (it's hard to >read), to a low, by putting append="video=atyfb:xres:800,yres:600" in >silo.conf. I am not if this is what you want, but it is similar. On a b100 hooked up to a TFT, I use append="video=atyfb:1024x768@60" to force the atyfb down to 60Hz. So maybe you should try append="video=atyfb:800x600@60" (or @75, or whatever refresh rate you need. HTH Ingo