Re-bonjour
J'ai trouvé :)
C'est un bug de rhythmbox !!!
dmesg :
......
usbfs: process 1697 (rhythmbox) did not claim interface 0 before use
......
" Could not lock the device while rhythmbox is running "
If Rhythmbox is running, I can't access pictures on my Canon Powershot.
After closing Rhythmbox, everything works perfectly. !!!!!!
https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/560441
Voilà Voilou !
On va attendre la résolution du bogue.
A+
RV2D