Just spent too long on this trying to find a solution but only the IP associated in the A record of a fully qualified domain and not the actual domain name was allowed access - the IP not a solution???
If it were possible to use a domain name that has an A record IP then all I would have to do is a domain name look up and find the IP associated with that domain name - so there is really no difference by using the IP of the domain name.
I then could type that in the address bar with phpmyadmin and reach the login page but that's as far as I could get unless I knew the user/pass combo.
I tried many and varied config changes and renaming to try and see what was blocking it including domain look up etc. all to a frustrating no avail.
If you find the solution or when one of those cryptic one line posters who always seem to put their oar in at the last minute (
I think you know who that description fits) then kindly put me out of my misery.
Good luck and sorry I could not come through this time.