EDID 1.3 section 5 gives a table describing the priority order of
timing information. Use this ordering when constructing the EDID
mode list.
Since aux/vga selects the first mode in the modelist that matches
the given size, it will now select the mode of that size with the
highest preference. Or, if you set vgasize=auto (or some other
string without an 'x'), aux/vga will select the Preferred Detailed
Timing.
This should make it unnecessary to modify vgadb in many cases.
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