Hi, John Crawley wrote: > [...] a command to emulate the > unplugging and re-plugging of the keyboard would be nice to have.
The internet mentions usbreset(1), available from package "usbutils". But the source code in https://sources.debian.org/src/usbutils/1%3A018-2/usbreset.c shows that the decisive action is a call to ioctl USBDEVFS_RESET, about which the Linux kernel documentation https://www.kernel.org/doc/Documentation/driver-api/usb.rst says ----------------------------------------------------------------------- USBDEVFS_RESET Does a USB level device reset. The ioctl parameter is ignored. After the reset, this rebinds all device interfaces. File modification time is not updated by this request. **Warning** *Avoid using this call* until some usbcore bugs get fixed, since it does not fully synchronize device, interface, and driver (not just usbfs) state. ----------------------------------------------------------------------- The man page is https://manpages.debian.org/unstable/usbutils/usbreset.1.en.html Addressing the USB port looks tricky, as it does not work via /dev file paths. ("Reset by product name" could be a good choice.) Have a nice day :) Thomas
