I had blogged about debugging deadlocked schedulers earlier for SQL Server 2008 R2 and below releases. Since there have been some fundamental changes in SQL Server 2012, I thought it would be a good idea to post about debugging the same scenario on SQL Server 2012 instances.
Older posts:
Debugging Deadlocked Schedulers Part 1
Debugging Deadlocked Schedulers Part 2
TroubleshootingSQL 