So I've done some testing and DVI actually works.Newer Radeon HD cards have something called a DIG encoder, older Radeon HD cards have a digital encoder. The DIG encoder (which is a newer digital encoder) requires some work still before it will function.
With the statements above said... I do have some good news:Radeon HD 2350 - Radeon HD 3450 - Analog / Digital (minus HDMI) extended mode setting working
Radeon HD 3470 - Radeon HD 4890 - Unknown. Please test!Radeon HD 5450+ - Analog mode change works, no video. Digital DIG encoder not complete
As digital is working on earlier cards and mode setting is pretty reliable now... I'm tempted to include the driver in the nightly images and #if 0 the 5450+ cards I know don't work. Quite a few people seem interested in testing :)
My plan is to slowly adjust the #if 0 as reports of non-functionality come in to narrow down exactly whats working.
Thoughts? -- Alex