Apport-gpu-error-intel.py crash
Solution 1:
Install xdiagnose version 2.5.1, which I uploaded to precise-proposed the other day.
The problem is that the Intel graphics driver has these weird "false gpu hangs". The GPU locks up but then recovers so that you don't actually notice anything, but it still is enough to trigger the error handler. Disabling apport doesn't disable this handler; 2.5.1 disables the handler directly.
Solution 2:
You may want to disable Apport:
sudo gksu gedit /etc/default/apport
change "enabled" from "1" to "0", then save the file.
You can always re-enable it later on if you want, by changing "enabled" from "0" back to "1", or you can enable Apport temporarily, using the following command:
sudo service apport start force_start=1