I have tried installing the package from Buster. That has resolved the crash - the program ended gracefully. However the underlying problem is still there - devices without interface 0 will not work. I think this is present in upstream as well.
USB_ModeSwitch log from Wed Dec 25 16:35:30 CET 2019 Use global config file: /etc/usb_modeswitch.conf Raw parameters: {--switch-mode} {1-11} Use top device dir /sys/bus/usb/devices/1-11 Check class of first interface ... No access to interface 0. Exit -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1676763 Title: usb_modeswitch_dispatcher crashed with SIGSEGV in strrchr() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs