I too am seeing this. (2.6.32-11-generic) Forced boot in recovery mode shows boot stuck at "SMP alternatives: switching to UP code" and an apparent kernel panic. Processor almost totally maxed out. No way to proceed or shut down except forced. Regress to previous kernel (2.6.32-10-generic) allows normal operation.
I too am seeing this. (2.6.32-11-generic) Forced boot in recovery mode shows boot stuck at "SMP alternatives: switching to UP code" and an apparent kernel panic. Processor almost totally maxed out. No way to proceed or shut down except forced. Regress to previous kernel (2.6.32-10-generic) allows normal operation.