Problem configuring GroovyMAME for 480p

[Nodoyuna]

Hi

I have a CRT Emudriver / GroovyMAME setup running perfectly fine on my PVM

Now, I'm trying to make a setup for 480p. The monitor is a modern Full HD 1080p but if I configure the emulators for 480p, they work perfect, displaying in a 480p monitor I have

But, I'm having problems making GroovyMAME works in the same way. I prefer to use GroovyMAME over regular MAME because of the switchres feature.

When I run GroovyMAME , it gives an error, stating "Could not find a videomode that meets your specs"

So, which are the settings I need to write on mame.ini in order to make it work at 480p? Do I need to make some additional steps?

Thanks in advance

[SuperMagoAlex]

If I remember well, in mame.ini set:

switchres                 0

modeline_generation       0

[Nodoyuna]

So, the only option is disabling switchres?

Also, what about resolutions above 480p? For example, some computers does have more resolution than 640x480

Thanks in advance