Comment 155 for bug 127101

Something strange is going on there..

Can you confirm that both:

Xorg.0.log_debug_reboot_now_working
and
Xorg.0.log_debug_clean_shutdown

are logs from the X server taken immediately after it starts and you've logged in? (No logout / login in between).
I ask because in the clean shutdown version of the log, you see it loading the kernel module for the i915 driver. In the reboot_now_working log, you don't see that which might indicate the X server isn't the first one to load in that case.

Could you dump lsmod output for both cases from a terminal in the Xserver.

Also, are you running xserver-xorg-video-intel_2.1.1-0ubuntu9~pcjc2_i386.deb now?

Peter