How can I fix the Absinthe Lockdown Error?
Some jailbreakers are receiving errors when trying to run Absinthe 2.0 to jailbreak iOS 5.1.1. These include "Could not connect to lockdown" or "Error detecting device (lockdown error -5)" during the process. There is a simple fix for the issues.
Before proceeding, make sure you backup your iPhone using iTunes or iCloud to preserve your data.
On your iOS device, navigate to Settings -> General -> Reset -> Erase All Content and Settings. After your device is cleared, proceed to follow the Absinthe jailbreak instructions as normal. After jailbreaking you can restore your content and settings from the backup.