[iamxCPx]

Ok, I'm not sure if this is a bug or not but this is what I did next and it was working.
Well, maybe until after my Mac mini goes to sleep again…

I reset the mac by pressing and hold CMD+ALT+P+R during start up.
I switched the cable to use the VGA cable and it works right away.
And then I switched it back to DVI cable and bam, it's back to normal.

Fingers crossed.
Hopefully I don't have to jump it all the time when the computer goes to sleep.
Or I might have to keep it on VGA all the time.
That would suck but I can live with it…