The succesfull workaround for Xorg crashing on Intel GM45 integrated graphics on Lenovo T400 was to create the the following file
/usr/share/X11/xorg.conf.d/20-intel-gm45.conf
Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "uxa" EndSection
Swtiching from SNA to UXA alleviated all the problems.
As a side note, gtkperf tool is very reliable to reproduce SNA Xorg crashes.
The succesfull workaround for Xorg crashing on Intel GM45 integrated graphics on Lenovo T400 was to create the the following file
/usr/share/ X11/xorg. conf.d/ 20-intel- gm45.conf
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "uxa"
EndSection
Swtiching from SNA to UXA alleviated all the problems.
As a side note, gtkperf tool is very reliable to reproduce SNA Xorg crashes.