Note: This has been tested on Ubuntu 17.04 and with iOS 10.3.3

As a workaround, you can mount your iOS device with ifuse.

sudo apt install ifuse

Now connect your device and make sure it is paired with your computer.

idevicepair validate

If you get a SUCCESS message, you are good, if not run idevicepair pair. Now you can use ifuse to mount your iOS images folder:

mkdir ~/pics && ifuse ~/pics

The images are now available in your $HOME folder under pics. Ready to be synced with Shotwell. To unmount the folder, use fusermount:

fusermount -u ~/pics && rmdir ~/pics

via: iphone - How do I access iOS camera pictures on Ubuntu 17.04? - Ask Ubuntu