If in stock Ubuntu, as you write, the sequence is as follows.
0. Disable automount (Nautilus and everywhere)
1. Plug-in, watching syslog. If identified, rejoice. If not, dancing with a tambourine and Google
2. ddrescue (pre-smoke man)
3. Photorec (if not immediately possible, to smoke man)
4. If not all recovered or exotic formats, try something else on the way (R-Studio, ZAR etc.).