Do you happen to have a media player like rhythmbox running in the background? Some of those also try to mount MTP devices and will happily mount your camera making it inaccessible to other programs.
For rhythmbox the solution is simple: disable the MTP plugin. -- can't mount digital camera showing a window popup message: -60 could not lock the device message https://bugs.launchpad.net/bugs/285682 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gvfs in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs