screen flickers after switching back from terminal to gdm

[Bram Kuijper]

Hi all,

If I want to fall back on a terminal, e.g. by pressing Ctrl+Alt+F1/2/3, 
it appears that I cannot go back to gdm/gnome on tty7. If I press 
Ctrl+Alt+F7 to go back to gnome, the display is grey and flickers.

I then killed all gdm-related processes and restarted gnome by using 
either the commands gdm or startx. In both cases, no luck: still, my 
screen flickers and only shows grey.

However, I only have the problem of a flickering display after going 
back from another tty to tty7 or when I restart gdm. I don't have the 
problem of the flickering display when the computer is starting up and 
boots gdm for the first time.

Does anybody have any pointers to information on flickering displays in 
cases like this?

thanks a lot for any information,


Bram

PS: my xorg error log is in pastebin:
http://pastebin.com/m246e1a5d

PS2: my graphical card is a Intel 82Q963/Q965 Integrated Graphics 
Controller. The graphics driver I use is the i810 driver.