Installing 15khz desktop resolution on Linux x11

[alphanu]

I don't think you can verify them. However if you installed them for Grooveymame than they are most probably dynamic. open Vmmaker, click on edit settings, go to the user modes tab. here you will see a option that is set to dynamic this needs to be changed to static.

Also in the usermodes.ini you need to put the resolutions in from the link above as well as the others you have.