Radeon HD6870, regression of support for DVI-D port.

[Bouncer]

I just built a gcc4 only compile of hrev45220.
I just get black screens after the bootup completes.

On the exact same hardware, booting with alpha-4.1, it does recognize the monitor located on the DVI-D port.

Am including the two syslogs, for side by side comparison.

[Bouncer]

This is the reference syslog from a Alpha-4.1 boot.

[Bouncer]

This is the syslog from the hrev45220 build.

[kallisti5]

definitely due to hrev45219

KERN: radeon_hd: Currently detected monitors===============
4304 KERN: radeon_hd: Display #0 attached = true
4306 KERN: radeon_hd: + connector ID: 0
4308 KERN: radeon_hd: + connector type: DisplayPort
4310 KERN: radeon_hd: + encoder type: TMDS
4312 KERN: radeon_hd: + limits: Vert Min/Max: 56/75
4314 KERN: radeon_hd: + limits: Horz Min/Max: 30/81
4316 KERN: radeon_hd: Display #1 attached = true
4318 KERN: radeon_hd: + connector ID: 1
4320 KERN: radeon_hd: + connector type: DisplayPort
4322 KERN: radeon_hd: + encoder type: TMDS
4324 KERN: radeon_hd: + limits: Vert Min/Max: 56/75
4326 KERN: radeon_hd: + limits: Horz Min/Max: 30/81

The logs from 45220 show two displayport devices attached... is this true?

[Bouncer]

Yes, Monitors 1 and 2 are both DisplayPort.
The third monitor, is connected as DVI.
This works fine for both W7 and Ubuntu.
I have the DVI monitor physically set up as the middle of 3 monitors.
(Just so I don't get a crick in my neck when running Haiku).

[kallisti5]

Do monitors 1 and 2 work now?

There is a maximum set on the number of monitors that will function (2) at the moment until we can get the AppServer working properly with mulitple displays.

See #8612 for more info on this.

The reason we can't just "set the correct mode on all displays" is due to how DisplayPort devices function.

#8612 is the "real" fix I think. The reason this worked in your case previously was because radeon_hd didn't properly detect both DisplayPort monitors.

[Bouncer]

Not sure what you mean. Here is a more precise description.

For Alpha4 build, Monitors 1 and 2 only work during the bootup sequence, displaying the icons.
During this, monitor 3 (the DVI monitor) stays black.
After the bootup 'rocket', monitors 1 and 2 go black, and monitor 3 would light up with the Haiku desktop.
Now for build 45220. Everything appears exactly the same, Monitors 1 & 2 show the bootup icons, monitor 3 is black. After the rocket, monitors 1 & 2 go black, but now Monitor 3 stays black.
I no longer get the desktop showing on the DVI display.

For now, I would be happy to have at least one of the monitors showing a display.

[kallisti5]

This *might* be resolved by hrev45325

Please test once the latest nightly image (hrev45325 or later) comes out and let me know.