External HDMI monitor not detected with ATI mobility Radeon on ubuntu 11.10 64 bit.

[rocky_raccoon]

I need some help, please. I use an ATI Mobility Radeon HD 6370 with proprietary drivers v11.8 in Ubuntu 11.10 64 bit and I can't get it to detect an external monitor through HDMI. Not with the Catalyst software nor with the "Displays" utility. I just want to set up a simple and straight forward clone display configuration to see my laptop output on my HD TV monitor. I can do this without any trouble in Windows 7 (same machine, dual boot) so I know there's nothing wrong with my hardware (laptop, cable or TV monitor).

I'm not sure what is going wrong here, but if it has anything to do with this, I can tell you that I have an xorg.conf file generated by

 sudo aticonfig -f --initial

and it is exactly the following:

Section "ServerLayout"
	Identifier     "aticonfig Layout"
	Screen      0  "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Module"
EndSection

Section "Monitor"
	Identifier   "aticonfig-Monitor[0]-0"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Device"
	Identifier  "aticonfig-Device[0]-0"
	Driver      "fglrx"
	BusID       "PCI:1:5:0"
EndSection

Section "Screen"
	Identifier "aticonfig-Screen[0]-0"
	Device     "aticonfig-Device[0]-0"
	Monitor    "aticonfig-Monitor[0]-0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

So, is there something I should add in there to make Catalyst detect my monitor? Or has it got nothing to do with it?

This is actually driving me insane. I´ve spent a whole day trying to work this around without much success. I did find out, however that if I run

aticonfig --lsa

I get the following output

* 0. 01:05.0 ATI Mobility Radeon HD 4200 Series
  1. 02:00.0 AMD Radeon HD 6300M Series

Apparently there are two adapters detected. The information section in the Catalyst GUI confirms this, however, the display manager only lists the 4200 adapter.
I thought I could sort this out with a new xorg.conf file generated by aticonfig --initial -f --adapter=all but that only resulted in X server failing to load at startup. I only got it working again by restoring the previous configuration.

All help is appreciated.

[rocky_raccoon]

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