I've begun having a problem with the linux binaries. When I first began using them, everything was fantastic. The game ran just fine, and I enjoyed it well enough at 640x480 resolution.

Then all of a sudden when I went to play earlier today, instead of just being in 640x480 full screen, the game played in a 640x480 rectangle in the lower left corner of the screen, while the rest of the screen was black and still at 1024x768 resolution.

I can't think of anything I've changed, and I think I would have remembered modifying my XF86Config file.

Any ideas on what could have caused it to stop displaying correctly, or at least what I could do to fix it?

Edit your .doom3/base/DoomConfig.cfg (or similar, I'm at university and cannot check) and look for "r_fullscreen" and set it to 1 to play fullscreen.
If does not work, lauch the game anyway, and while inside game press "alt+enter" and see if it goes fs.

If non of the above work, i'm out of ideas

The problem isn't that it's in a windowed mode, it's that when I select 640x480 resolution for the game under fullscreen mode the game appears in a rectangle in the lower left hand corner of the screen and the rest of the screen is black. Thank you for your response though

Ough, I misunderstood....Now i get the idea...but no solution....cannot guess what can be the problem

I have exactly the same problem as "Psyddicus". It doesn't matter which resolution I choose, the game always appears in the lower left corner of the screen. The rest of the screen is black.

Please help!

Well, I solved my problem, but I'm not sure if the fix would be the same for you.

It turns out that I was doing something different. I had plugged in my component cable so I could use my graphics cards' TV-Out functionality. The problem with this is that when X started while the cable was plugged in, it used the MetaModes option and the screen was only ready to use 1024x768 resolution.

To fix this I chaged my MetaModes to this (in XF86Config):

This enabled my monitor to display in either of the listed sets of resolutions, and so when I would start Doom 3 it would play fullscreen in 640x480 and would also show up on my TV fullscreen, and when I wasn't playing Doom 3 my desktop was 1024x768 and it showed up that way on my TV as well.

I dunno if this helps you at all pokke, but I hope it does and your problem is just a simple thing like mine was.