My Canon ixus 510 HS is not recognized anymore if I plug it in a USB port after upgrading from 13.10 to 14.04. No popups or other signs from the operating system, and it does not become visible in nautilus. Mount shows no device. If I use the memory card in a reader connected to the same USB port there is no problem.
lsusb shows:
[...]
Bus 002 device 016: ID 04a9:3246 Canon, Inc
[...]
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