I just build the last revision from git (commit 3aa8591abfbe8db0f13912910c850fdd748808df )
and the detection of TV and VGA is working (although the tv disconnection looks like it's not detected, but that doesn't really matter).

When I try to activate the TV or VGA output, I got a blank tv or vga screen.

Here are some logs :

Just after X started :
(II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Video Bus: xkb_rules: "evdev"
(**) Option "xkb_model" "pc105"
(**) Video Bus: xkb_model: "pc105"
(**) Option "xkb_layout" "fr"
(**) Video Bus: xkb_layout: "fr"
(**) Option "xkb_variant" "oss"
(**) Video Bus: xkb_variant: "oss"
(II) intel(0): EDID vendor "CMO", prod id 5414
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1280x800"x0.0   71.00  1280 1328 1360 1440  800 803 809 823 -hsync -vsync (49.3 kHz)
(II) intel(0): EDID vendor "CMO", prod id 5414
(EE) intel(0): underrun on pipe B!
AUDIT: Sun Feb  8 20:33:52 2009: 11675 X: client 4 rejected from local host ( uid=0 gid=0 pid=11703 )
AUDIT: Sun Feb  8 20:33:55 2009: 11675 X: client 4 rejected from local host ( uid=500 gid=500 pid=11711 )
AUDIT: Sun Feb  8 20:33:55 2009: 11675 X: client 4 rejected from local host ( uid=500 gid=500 pid=11712 )
AUDIT: Sun Feb  8 20:33:55 2009: 11675 X: client 4 rejected from local host ( uid=500 gid=500 pid=11713 )
(II) intel(0): EDID vendor "CMO", prod id 5414
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1280x800"x0.0   71.00  1280 1328 1360 1440  800 803 809 823 -hsync -vsync (49.3 kHz)


When I run xrandr :
joss@joss-laptop:~$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 800, maximum 3048 x 2048
VGA connected (normal left inverted right x axis y axis)
   1280x1024      75.0 +   60.0     60.0  
   1680x1050      59.9 +   60.0  
   1600x1024      60.2  
   1400x1050      70.0     60.0  
   720x400        70.1  
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1280x800       59.9*+
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
TV disconnected (normal left inverted right x axis y axis)

Related Xlog :
(II) intel(0): I2C device "CRTDDC_A:ddc2" registered at address 0xA0.
(II) intel(0): EDID vendor "GSM", prod id 22122
(II) intel(0): EDID vendor "CMO", prod id 5414
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1280x800"x0.0   71.00  1280 1328 1360 1440  800 803 809 823 -hsync -vsync (49.3 kHz)


When I try to enable the VGA screen :
(EE) intel(0): underrun on pipe B!
(II) intel(0): EDID vendor "GSM", prod id 22122
(II) intel(0): EDID vendor "CMO", prod id 5414

related xrandr output :
Screen 0: minimum 320 x 200, current 2960 x 1050, maximum 3048 x 2048
VGA connected 1680x1050+1280+0 (normal left inverted right x axis y axis) 474mm x 296mm
   1280x1024      75.0 +   60.0     60.0  
   1680x1050      59.9*+   60.0  
   1600x1024      60.2  
   1400x1050      70.0     60.0  
   1440x900       75.0     59.9     60.0  
   720x400        70.1  
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1280x800       59.9*+
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
TV disconnected (normal left inverted right x axis y axis)


I'm trying to investigate this pipe underrun

See you