Same problem here, but then on Xubuntu 18.04.3 LTS computer and an old iPhone 4.
Failed to mount "Documents on XYZ iPhone". Unhandled Lockdown error (-2). When I type "idevicepair pair" in the terminal, it gives me the following message: ERROR: Could not validate with device d91d11bb8bf8225ab0dd67380ddec2a8afcbdc58 because a passcode is set. Please enter the passcode on the device and retry. However, on the iPhone itself I do not receive the "trust this device?" message, and thus am unable to continue. Rebooting the iPhone or computer does not help. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to libimobiledevice in Ubuntu. https://bugs.launchpad.net/bugs/1799913 Title: Unhandled lockdown error (-2) - iphone ios 12 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libimobiledevice/+bug/1799913/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
