This question already has an answer here:
I am using Ubuntu 12.04 LTS and when i try to connect my iPhone i get the following message.
The device 'Mithun's iPhone' is locked. Enter the passcode on the device and click 'Try Again'.
I get this despite the iPhone unlocked. I also get a message on my phone asking "Trust this computer? " which keeps repeating even after selecting Trust.
Along with the above message I also get
Unable to mount Mithun's iPhone
DBus error org.freedesktop,DBus.Error.NoReply:Message did not receive a reply (timeout by message bus)
Please help me out.