According to your bug description, it appears you are running 12.04. However, the apport data attached to the bug indicates you are running 13.04. Did you perform an upgrade from Precise to Raring? If so, did you see this issue in both Precise and Raring?
Another thing is we see the following boot options:
drm.debug=0xe plymouth:debug
Can you boot without those options and see if this bug still exists?
According to your bug description, it appears you are running 12.04. However, the apport data attached to the bug indicates you are running 13.04. Did you perform an upgrade from Precise to Raring? If so, did you see this issue in both Precise and Raring?
Another thing is we see the following boot options:
drm.debug=0xe plymouth:debug
Can you boot without those options and see if this bug still exists?