Using the test application ffs-test.c I can reproduce this error that seems to be a bug in FunctionFS. At the host, my device shows up sometimes with .Interface having a random value, in which case "Language 0x0409 : "Source/Sink"" would be displayed. But most of the times it's 0x00 which leads to no String being displayed. Has anyone else noticed this behaviour? -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html