Hi all, > > When I was doing some libusb work, I found that I needed to unbind the > interface from the driver before I could claim it with libusb. The > interface will remain unclaimed until the device is connected again. I > currently run the following commands to unbind the interface whenever > I need to use the device and libusb can't claim the interface. > > # cd /sys/bus/usb/drivers/usbhid > # echo -n interface > unbind > "interface" is the name of the interface in the > /sys/bus/usb/drivers/usbhid folder. For my device, it was something > like "6-2:1.0". It will look similar for your device. From your lsusb > output, I'd guess that your interface would have the identifier > "4-2:1.0". The first part of that identifier varies based on which bus > and port number your device is plugged into and the second part varies > with the configuration number (usually always 1) and the interface > number. >
I tried that, and the device doesn't appear in /sys/bus/usb/drivers/usbhid. Nor does it appear under any /sys/bus/usb/drivers directory: r...@puigmal:/sys/bus/usb# ls -R .: devices drivers drivers_autoprobe drivers_probe uevent ./devices: 1-0:1.0 3-1 3-1:1.2 4-1 4-2:1.0 usb1 usb4 2-0:1.0 3-1:1.0 3-1:1.3 4-1:1.0 5-0:1.0 usb2 usb5 3-0:1.0 3-1:1.1 4-0:1.0 4-2 6-0:1.0 usb3 usb6 ./drivers: btusb hiddev hub usb usbfs usbhid ./drivers/btusb: 3-1:1.0 3-1:1.1 bind module new_id uevent unbind ./drivers/hiddev: bind module new_id uevent unbind ./drivers/hub: 1-0:1.0 3-0:1.0 5-0:1.0 bind new_id unbind 2-0:1.0 4-0:1.0 6-0:1.0 module uevent ./drivers/usb: 3-1 4-1 4-2 bind uevent unbind usb1 usb2 usb3 usb4 usb5 usb6 ./drivers/usbfs: bind module new_id uevent unbind ./drivers/usbhid: 4-1:1.0 4-2:1.0 bind module new_id uevent unbind r...@puigmal:/sys/bus/usb# lsusb Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 004: ID 047d:1062 Kensington PocketMouse Max Bus 004 Device 003: ID 0fde:ca01 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 03f0:171d Hewlett-Packard Wireless (Bluetooth + WLAN) Interface [Integrated Module] Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub This was done just after starting the computer and plugging in the weather station, before running any C program. Might there be any other program claiming the interface? How could I check that? Thanks, Jordi
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