It looks like I have two libusb 0.1.12-28 and 1.0.20-1. pyusb is 1.0.0~b2-2
And yes. Locale is sv_SE.UTF-8 It has been working flawless on this machine for more than a year. This error started when I did a upgrade from Ubuntu 14.04 to 16.04. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
