Better title.

please attach your xorg config and log.

Created attachment 12612 [details]
Xorg log

Created attachment 12613 [details]
Xorg config

Does this ati git master help?

Also, the proper MacModel should now be detected automatically in most cases.

I have tried 6.7.198~git20071223.ad3325f6-1 now.
Indeed, I no longer have to add the MacModel option.

However, this time my external display doesn't blank after a while, but is blanked  already at X start (I see it get switched on though).  When I try to access the menu of my display it claims to be in powersave mode.

The xorg.conf is the same as I have attached before.  I have added an updated logfile.

Created attachment 13397 [details]
update Xorg log

Also some xrandr output that might be useful (though it reports what I expect it to):
Screen 0: minimum 320 x 200, current 3200 x 1300, maximum 3200 x 1500
LVDS connected 1280x854+1920+446 (normal left inverted right x axis y axis) 21mm x 214mm
   1280x854       60.0*+
   1280x800       60.0  
   1280x768       60.0  
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
DVI-0 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm
   1920x1200      60.0*+
   1600x1200      59.9  
   1680x1050      60.0  
   1280x1024      75.0     59.9  
   1152x864       74.8  
   1024x768       75.1     60.0  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
S-video disconnected (normal left inverted right x axis y axis)

Created attachment 13458 [details] [review]
possible fix

Does this patch help (against ati git master)?

Unfortunately no... X starts with the DVI-connected head blank/black.

is this still an issue with kms or newer versions of the driver?

(In reply to comment #12)
> is this still an issue with kms or newer versions of the driver?

I have moved in the meantime, have a new laptop and don't have this setup anymore.  So, honestly, I don't know.

Closing then, thanks.