Wow.  The people that wrote that BIOS are complete clowns.

1) EDID block with the panel size, but no VESA mode matching that size
2) Detailed timing for the panel mode given in EDID, twice, just for fun
3) EDID is otherwise non-conformant (missing name and range descriptors)

xorg-x11-drv-vesa 1.3.0-4.fc7 on its way to rawhide now, should work
marginally better.  You still won't the native 1680x1050 panel size on
account of clown screwup #1, but you should get 1400x1050 at least.

Friends don't let friends use vesa,

- ajax