Created attachment 17346 [details]
output of lspci -vnn

Latest working kernel version: 2.6.25
Earliest failing kernel version: ? 2.6.26~rc5 (previous RCs not tested).
Distribution: Debian/testing
Hardware Environment: Thinkpad T60 (Intel video chipset)
Software Environment: 
  Debian's xserver-xorg              1:7.3+10 
  Debian's xserver-xorg-video-intel  2:2.3.2-1
  Kernel from http://kernel-archive.buildserver.net/debian-kernel/ 


Problem Description:
 If I close my laptop's panel when I have an external monitor 
 attached and enabled, my laptop freeze... i have to power it off.


Steps to reproduce:
Plug an external screen to a Thinkpad T60 laptop (based on intel chipset).
Then boot the laptop, and log into gnome. Make sure that :
1. Both screen are enabled (xrandr --auto).
2. Gnome power setting has : "When laptop lid is closed" = "Blank Screen"
3. Close the laptop's panel.
=> The laptop is now frozen.

It occurs when : using linux-image-2.6.26-rc5, rc6 or rc7.
Does not occurs with : linux-image-2.6.24 , 2.6.25 from Debian/testing.

Occurs if gnome has "When laptop lid is closed" = "Blank Screen"
Doesn't occur if it's set to "Do nothing"

Occurs on my T60, with :
  Intel 945GM/PM/GMS Express Memory Controller Hub [8086:27a0]
  Intel 945GM/GMS Express Integrated Graphics Controller [8086:27a2] 
Does NOT occur on a T61, with 
  Intel GM965/GL960 Integrated Graphics Controller [8086:2a02]
  Intel GM965/GL960 Integrated Graphics Controller [8086:2a03]

Occurs when both output are enable (crt=on + lvds=on)
Doen not occurs when only one of the screens are enabled (crt=on + lvds=off OR
crt=off + lvds=on).

Note :
The laptop can suspend or hibernate, then resumes correctly.

Running gnome screensaver is ok (but gnome doesn't seems to want
to put the screens in powersave mode).

++++
As requested by Linux kernel maintainers I've tried to enable "ForceEnablePipeA" which works.

I've attached lspci, as requested.

thanks,
Franklin

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see also:
 http://bugzilla.kernel.org/show_bug.cgi?id=10965#c4 
 http://bugs.debian.org/487672