The title says it all. Please see the attached log for more information.
nvidia-bug-report.log.gz (67.6 KB)
Dell Latitude E6520 (optimus laptop): Cannot switch to external monitor after resuming from sleep mo
Can you please describe the problem in more detail? What exactly are you doing to try to switch to the external monitor, and how is it failing?
Does the problem still occur with the latest driver release?