Tiny fonts on HDTV

[NutMonkey]

I'm hooking up my Kubuntu 9.04 PC to my HDTV (Sony KDS-60A3000) using a DVI to HDMI cable. Resolution is correct, but the font is tiny and unreadable. It's fine on the console, but starting on the kdm screen and after I log in, it's tiny. I ran a pyqt app I wrote where I set the font to 20px, and that text looks fine. Why is this, and is there shortcut keys to increase the font size or something?

[NutMonkey]

I stumbled on a setting for force DPI 120 and that seemed to do the trick.

[JRAltd]

Where did you go to fix this? Post a explaition of where to find this and I think that would have made your fonts once logged in huge didnt it?
Please post how you made the change.

Thank you, :)