default resolution on distro boot

[mikezb@softhome.net]

Given that several Linux distros identify (on boot) my display brand and 
type, get the size only slightly wrong, but default to a resolution that 
isn't native and doesn't work correctly, how do I identify just what 
package, module, or kernel part this "bug" hides in?
I'm using a Sharp 32" LCD tv via hdmi cable, and it's identified as a 37".
That's not as important as the default resolution, which comes up as
1280x720, but should be 1360x768 (or 1024x768 if wxga isn't doable).