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Rebinding usb hid devices to hid-generic driver fails
using kernel 3.8.0-34-generic (Mint 15)
If I plug in a usb mouse (mfr/vendor id: 03F0:8607) it works fine and is (by default) handled with hid-generic:
# tree /sys/bus/hid/drivers/hid-generic
/sys/bus/hid/drivers/hid-generic
├── 0003:03F0:8607.0007 -> ../../../../devices/pci0000:00/0000:00:12.2/usb1/1-2/1-2.1/1-2.1.2/1-2.1.2:1.0/0003:03F0:8607.0007
├── 0003:093A:2510.0001 -> ../../../../devices/pci0000:00/0000:00:13.0/usb5/5-1/5-1:1.0/0003:093A:2510.0001
├── bind
├── module -> ../../../../module/hid_generic
├── new_id
├── uevent
└── unbind
Now I unbind the device:
# echo -n 0003:03F0:8607.0007 > /sys/bus/hid/drivers/hid-generic/unbind
The binding has gone:
# tree /sys/bus/hid/drivers/hid-generic
/sys/bus/hid/drivers/hid-generic
├── 0003:093A:2510.0001 -> ../../../../devices/pci0000:00/0000:00:13.0/usb5/5-1/5-1:1.0/0003:093A:2510.0001
├── bind
├── module -> ../../../../module/hid_generic
├── new_id
├── uevent
└── unbind
and the mouse stops working - as expected.
But now I want to rebind it:
# echo -n 0003:03F0:8607.0007 > /sys/bus/hid/drivers/hid-generic/bind
The binding apparently succeeds:
# tree /sys/bus/hid/drivers/hid-generic
/sys/bus/hid/drivers/hid-generic
├── 0003:03F0:8607.0008 -> ../../../../devices/pci0000:00/0000:00:12.2/usb1/1-2/1-2.1/1-2.1.2/1-2.1.2:1.0/0003:03F0:8607.0008
├── 0003:093A:2510.0001 -> ../../../../devices/pci0000:00/0000:00:13.0/usb5/5-1/5-1:1.0/0003:093A:2510.0001
├── bind
├── module -> ../../../../module/hid_generic
├── new_id
├── uevent
└── unbind
but the mouse doesn't start working again. Why not? The only thing that has changed is the instance number (in bold).
Would you expect this to work or is the bind/unbind process a bit more complicated?
Last edited by onamatic; 01-02-2014 at 08:48 AM.
Reason: clarity
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