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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Do not attempt to detach a kernel driver under FreeBSD","articleBody":"Under FreeBSD, the original code throws an exception:\n```\nCould not detach kernel driver from interface(0): [Errno None] b'Unknown error'\n```\nKernel driver detaching is not implemented (and not necessary) under FreeBSD.\n\nThe following patch solved it for me:\n```\n--- usbtmc/usbtmc.py.orig       2017-01-18 05:35:14 UTC\n+++ usbtmc/usbtmc.py\n@@ -841,7 +841,7 @@\n             raise NotImplementedError()\n \n     def _release_kernel_driver(self, interface_number):\n-        if os.name == 'posix':\n+        if os.name == 'posix' and os.uname()[0] != 'FreeBSD':\n             if self.device.is_kernel_driver_active(interface_number):\n                 self.reattach.append(interface_number)\n                 try:\n```","author":{"url":"https://github.com/dl8dtl","@type":"Person","name":"dl8dtl"},"datePublished":"2025-03-01T21:23:53.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/67/python-usbtmc/issues/67"}