I found this an it works fine for me:
Quick fix - run script in terminal "sudo killall gvfs-gphoto2-volume-monitor" then connect the camera.
Long-term fix (Prevent the process from starting) - run script in terminal "sudo chmod -x /usr/lib/gvfs/gvfs-gphoto2-volume-monitor"
Then go to System -> Preferences -> Removable drives and media -> Cameras and remove the "f-spot-import" with "gthumb --import-photos" or etc...
I found this an it works fine for me:
Quick fix - run script in terminal "sudo killall gvfs-gphoto2- volume- monitor" then connect the camera.
Long-term fix (Prevent the process from starting) - run script in terminal "sudo chmod -x /usr/lib/ gvfs/gvfs- gphoto2- volume- monitor"
Then go to System -> Preferences -> Removable drives and media -> Cameras and remove the "f-spot-import" with "gthumb --import-photos" or etc...