How can I hard reset a USB device?
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Cory
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Published on 2010-08-16T10:31:32Z
Indexed on
2011/01/29
23:33 UTC
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I have a USB device (a modem) that is really finicky. Sometimes it works fine, but other times it refuses to connect. The only solution I have found to fix it once it gets into a bad state is to physically unplug the device and plug it back in. However, I don't always have physical access to the machine it is plugged in on, so I'm looking for a way to do this through the command line.
This post suggests running:
sudo modprobe -w -r usb_storage; sudo modprobe usb_storage
However I get an "unknown option -w" output. This slightly modified command:
sudo modprobe -r usb_storage
Fails with the message FATAL: Module usb_storage is in use. If I try to kill -9 the processes marked [usb-storage] before running they refuse to die (I think because they are deeply tied to the kernel).
Anyone know of a way to do this?
NOTE: I cross-posted this on superuser.com as I didn't know which was more appropriate. I will delete and/or link whichever one is answered first.
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