Comment 22 for bug 1523291

How did you get that? There should be a lot more messages than that. You can either run "calibre-debug -g" from the command line and capture the output, or restart calibre in debug mode. That is done by right clicking (or equivalent on a Mac) on the preferences button and selecting "restart in debug mode". Calibre restarts and displays a message about the log. Then plugin the device and wait for the error. When that happens, close calibre and the log should be displayed. That should have a lot of debug messages.