I have an Intel 945GM and am using dual screens in extended mode. I'm 
experiencing the screen flicker as well.
I've tracked down the issue to a problem with Xorg. For some reason, it does 
DDC detection every time a new application is open (so every time a new app 
connects to the X server).The following lines are printed in the 
/var/log/Xorg.0.log EVERY TIME an application is launched:

[EMAIL PROTECTED]:~$ tail /var/log/Xorg.0.log -n 30
(II) intel(0): EDID vendor "SEC", prod id 17495
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1440x900"x0.0   95.44  1440 1504 1536 1744  900 903 
906 912 -hsync -vsync (54.7 kHz)
(II) intel(0): EDID vendor "SEC", prod id 17495
(II) intel(0): EDID vendor "SAM", prod id 549
(II) intel(0): EDID vendor "SEC", prod id 17495
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1440x900"x0.0   95.44  1440 1504 1536 1744  900 903 
906 912 -hsync -vsync (54.7 kHz)
(II) intel(0): EDID vendor "SEC", prod id 17495
(II) intel(0): EDID vendor "SAM", prod id 549
(II) intel(0): EDID vendor "SEC", prod id 17495
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1440x900"x0.0   95.44  1440 1504 1536 1744  900 903 
906 912 -hsync -vsync (54.7 kHz)


This is clearly what is causing the screen flicker. We need to file a bug 
upstream against Xorg. Maybe one has been filed already. Anyone aware of this?

This bug should probably be moved to a more generic xorg package since
it's not specific to nv. Maybe xserver-xorg-core ?

In the meantime, I've attached my /var/log/Xorg.0.log
Could others attach it as well to see if it is indeed the same issue? Thank you!

** Attachment added: "Xorg.0.log"
   http://launchpadlibrarian.net/16475429/Xorg.0.log

-- 
Screen flickers when loading applications
https://bugs.launchpad.net/bugs/245383
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