Comment 18 for bug 1800794

Rather than pasting just a single error line, please include the full debug log for running usb-modeswitch. You can do that by modifying /etc/usb_modeswitch.conf:

EnableLogging=1

And looking under /var/log/ for the log file written by usb-modeswitch after it has run.

Having the full file means we know exactly what happens as usb-modeswitch tries to probe the device, it will be much easier to figure out what goes wrong and why.

The "Could not read attribute" might not be fatal by itself; something else is likely making it impossible to figure out what type of device exactly it is and whether it is in the right mode.