Disable the external keyboard from a script

linux x11 keyboard udev xinput

5,558

Solution 1

Using a script

One method would be via a script that gets invoked as a script from UDEV. The method I would take, I fleshed out in this U&L Q&A titled: How to disable keyboard?.

There are pretty good directions on enabling/disabling a keyboard here as well, titled: Disable / enable keyboard and mouse in Linux.

Example

You can list the devices with this command.

$ xinput --list
"Virtual core pointer"  id=0    [XPointer]
"Virtual core keyboard" id=1    [XKeyboard]
"Keyboard2"     id=2    [XExtensionKeyboard]
"Mouse2"        id=3    [XExtensionKeyboard]

And disable the keyboard with this:

$ xinput set-int-prop 2 "Device Enabled" 8 0

And enable it with this one:

$ xinput set-int-prop 2 "Device Enabled" 8 1

So you could put the above commands into scripts that UDEV could call them.

NOTE: This only works for disabling the keyboard through X. So if you're on a system that isn't running X this won't work.

Using UDEV

I think you might be able to adapt one of these rules to disable a USB based keyboard using a rule similar to this one:

BUS=="usb", KERNEL=="hdb", OPTIONS+="ignore_device"

You'd need to determine the identifications for your external keyboard. I believe all the information you'd need to craft one of these rules is included in the output that you included in your question.

Solution 2

Well, you can disable any USB device, in this case, keyboard. Navigate to directory /sys/bus/usb/drivers/usbhid

It will list all the USB HID device's number. For your keyboard, find out correct number and execute the command:

echo -n 2-1.4:1.0 > unbind

It will unbind (disable) the underlying USB hardware To enable it again, execute

echo -n 2-1.4:1.0 > bind

Here, issue is to find out correct number. But that can be solved by knowing the vendor and product id

5,558

ibasaran

Updated on September 18, 2022

Comments

ibasaran over 1 year

I have a udev rule for my external keyboard. I can catch events, and by running a script I can also reach udev env variables. Can I disable keyboard with udev? Or must I use a script to disable the keyboard in another way.

There is a one way to disable keyboard with script to running xinput but it wants an "id". How can I get the id information for xinput from udev? or is there another effective way?

Whole trace when I monitor udev for keyboard:

KERNEL[2563.037091] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2 (usb)
ACTION=add
BUSNUM=002
DEVICE=/proc/bus/usb/002/003
DEVNAME=bus/usb/002/003
DEVNUM=003
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2
DEVTYPE=usb_device
MAJOR=189
MINOR=130
PRODUCT=1c4f/2/110
SEQNUM=1538
SUBSYSTEM=usb
TYPE=0/0/0
UDEV_LOG=3

KERNEL[2563.037837] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0 (usb)
ACTION=add
DEVICE=/proc/bus/usb/002/003
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0
DEVTYPE=usb_interface
INTERFACE=3/1/1
MODALIAS=usb:v1C4Fp0002d0110dc00dsc00dp00ic03isc01ip01
PRODUCT=1c4f/2/110
SEQNUM=1539
SUBSYSTEM=usb
TYPE=0/0/0
UDEV_LOG=3

KERNEL[2563.038023] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/0003:1C4F:0002.0005 (hid)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/0003:1C4F:0002.0005
HID_ID=0003:00001C4F:00000002
HID_NAME=SIGMACH1P USB Keykoard
HID_PHYS=usb-0000:09:00.0-2/input0
MODALIAS=hid:b0003v00001C4Fp00000002
SEQNUM=1540
SUBSYSTEM=hid
UDEV_LOG=3

KERNEL[2563.040754] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/input/input17 (input)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/input/input17
EV=120013
KEY=1000000000007 ff800000000007ff febeffdff3cfffff fffffffffffffffe
LED=7
MODALIAS=input:b0003v1C4Fp0002e0110-e0,1,4,11,14,k71,72,73,74,75,77,79,7A,7B,7C,7D,7E,7F,80,81,82,83,84,85,86,87,88,89,8A,B7,B8,B9,BA,BB,BC,BD,BE,BF,C0,C1,C2,F0,ram4,l0,1,2,sfw
MSC=10
NAME="SIGMACH1P USB Keykoard"
PHYS="usb-0000:09:00.0-2/input0"
PRODUCT=3/1c4f/2/110
PROP=0
SEQNUM=1541
SUBSYSTEM=input
UDEV_LOG=3
UNIQ=""

KERNEL[2563.040970] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/input/input17/event6 (input)
ACTION=add
DEVNAME=input/event6
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/input/input17/event6
MAJOR=13
MINOR=70
SEQNUM=1542
SUBSYSTEM=input
UDEV_LOG=3

KERNEL[2563.041090] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/0003:1C4F:0002.0005/hidraw/hidraw2 (hidraw)
ACTION=add
DEVNAME=hidraw2
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/0003:1C4F:0002.0005/hidraw/hidraw2
MAJOR=252
MINOR=2
SEQNUM=1543
SUBSYSTEM=hidraw
UDEV_LOG=3

KERNEL[2563.041168] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1 (usb)
ACTION=add
DEVICE=/proc/bus/usb/002/003
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1
DEVTYPE=usb_interface
INTERFACE=3/0/0
MODALIAS=usb:v1C4Fp0002d0110dc00dsc00dp00ic03isc00ip00
PRODUCT=1c4f/2/110
SEQNUM=1544
SUBSYSTEM=usb
TYPE=0/0/0
UDEV_LOG=3

KERNEL[2563.041309] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/0003:1C4F:0002.0006 (hid)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/0003:1C4F:0002.0006
HID_ID=0003:00001C4F:00000002
HID_NAME=SIGMACH1P USB Keykoard
HID_PHYS=usb-0000:09:00.0-2/input1
MODALIAS=hid:b0003v00001C4Fp00000002
SEQNUM=1545
SUBSYSTEM=hid
UDEV_LOG=3

KERNEL[2563.044144] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/input/input18 (input)
ABS=100000000
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/input/input18
EV=1f
KEY=4837fff072ff32d bf54444600000000 1 20c100b17c000 267bfad941dfed 9e168000004400 10000002
MODALIAS=input:b0003v1C4Fp0002e0110-e0,1,2,3,4,k71,72,73,74,77,80,82,83,85,86,87,88,89,8A,8B,8C,8E,8F,90,96,98,9B,9C,9E,9F,A1,A3,A4,A5,A6,A7,A8,A9,AB,AC,AD,AE,B1,B2,B5,CE,CF,D0,D1,D2,D4,D8,D9,DB,E4,EA,EB,F1,100,161,162,166,16A,16E,172,174,176,178,179,17A,17B,17C,17D,17F,180,182,183,185,188,189,18C,18D,18E,18F,190,191,192,193,195,198,199,19A,1A0,1A1,1A2,1A3,1A4,1A5,1A6,1A7,1A8,1A9,1AA,1AB,1AC,1AD,1AE,1B0,1B1,1B7,1BA,r6,a20,m4,lsfw
MSC=10
NAME="SIGMACH1P USB Keykoard"
PHYS="usb-0000:09:00.0-2/input1"
PRODUCT=3/1c4f/2/110
PROP=0
REL=40
SEQNUM=1546
SUBSYSTEM=input
UDEV_LOG=3
UNIQ=""

KERNEL[2563.044365] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/input/input18/event7 (input)
ACTION=add
DEVNAME=input/event7
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/input/input18/event7
MAJOR=13
MINOR=71
SEQNUM=1547
SUBSYSTEM=input
UDEV_LOG=3

KERNEL[2563.044560] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/0003:1C4F:0002.0006/hidraw/hidraw3 (hidraw)
ACTION=add
DEVNAME=hidraw3
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/0003:1C4F:0002.0006/hidraw/hidraw3
MAJOR=252
MINOR=3
SEQNUM=1548
SUBSYSTEM=hidraw
UDEV_LOG=3

UDEV  [2563.066401] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2 (usb)
ACTION=add
BUSNUM=002
DEVICE=/proc/bus/usb/002/003
DEVNAME=/dev/bus/usb/002/003
DEVNUM=003
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2
DEVTYPE=usb_device
ID_BUS=usb
ID_MODEL=USB_Keykoard
ID_MODEL_ENC=USB\x20Keykoard
ID_MODEL_ID=0002
ID_REVISION=0110
ID_SERIAL=SIGMACH1P_USB_Keykoard
ID_USB_INTERFACES=:030101:030000:
ID_VENDOR=SIGMACH1P
ID_VENDOR_ENC=SIGMACH1P
ID_VENDOR_ID=1c4f
MAJOR=189
MINOR=130
PRODUCT=1c4f/2/110
SEQNUM=1538
SUBSYSTEM=usb
TYPE=0/0/0
UDEV_LOG=3
USEC_INITIALIZED=2563048257

UDEV  [2563.071837] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1 (usb)
ACTION=add
DEVICE=/proc/bus/usb/002/003
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1
DEVTYPE=usb_interface
INTERFACE=3/0/0
MODALIAS=usb:v1C4Fp0002d0110dc00dsc00dp00ic03isc00ip00
PRODUCT=1c4f/2/110
SEQNUM=1544
SUBSYSTEM=usb
TYPE=0/0/0
UDEV_LOG=3
USEC_INITIALIZED=2563068334

UDEV  [2563.072377] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0 (usb)
ACTION=add
DEVICE=/proc/bus/usb/002/003
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0
DEVTYPE=usb_interface
INTERFACE=3/1/1
MODALIAS=usb:v1C4Fp0002d0110dc00dsc00dp00ic03isc01ip01
PRODUCT=1c4f/2/110
SEQNUM=1539
SUBSYSTEM=usb
TYPE=0/0/0
UDEV_LOG=3
USEC_INITIALIZED=2563068933

UDEV  [2563.079363] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/0003:1C4F:0002.0005 (hid)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/0003:1C4F:0002.0005
HID_ID=0003:00001C4F:00000002
HID_NAME=SIGMACH1P USB Keykoard
HID_PHYS=usb-0000:09:00.0-2/input0
MODALIAS=hid:b0003v00001C4Fp00000002
SEQNUM=1540
SUBSYSTEM=hid
UDEV_LOG=3
USEC_INITIALIZED=2563074770

UDEV  [2563.080760] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/0003:1C4F:0002.0005/hidraw/hidraw2 (hidraw)
ACTION=add
DEVNAME=/dev/hidraw2
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/0003:1C4F:0002.0005/hidraw/hidraw2
MAJOR=252
MINOR=2
SEQNUM=1543
SUBSYSTEM=hidraw
UDEV_LOG=3
USEC_INITIALIZED=2563080427

UDEV  [2563.084307] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/0003:1C4F:0002.0006 (hid)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/0003:1C4F:0002.0006
HID_ID=0003:00001C4F:00000002
HID_NAME=SIGMACH1P USB Keykoard
HID_PHYS=usb-0000:09:00.0-2/input1
MODALIAS=hid:b0003v00001C4Fp00000002
SEQNUM=1545
SUBSYSTEM=hid
UDEV_LOG=3
USEC_INITIALIZED=2563073436

UDEV  [2563.085738] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/0003:1C4F:0002.0006/hidraw/hidraw3 (hidraw)
ACTION=add
DEVNAME=/dev/hidraw3
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/0003:1C4F:0002.0006/hidraw/hidraw3
MAJOR=252
MINOR=3
SEQNUM=1548
SUBSYSTEM=hidraw
UDEV_LOG=3
USEC_INITIALIZED=2563085486

UDEV  [2563.238882] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/input/input18 (input)
ABS=100000000
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/input/input18
EV=1f
ID_BUS=usb
ID_INPUT=1
ID_INPUT_KEY=1
ID_MODEL=USB_Keykoard
ID_MODEL_ENC=USB\x20Keykoard
ID_MODEL_ID=0002
ID_PATH=pci-0000:09:00.0-usb-0:2:1.1
ID_PATH_TAG=pci-0000_09_00_0-usb-0_2_1_1
ID_REVISION=0110
ID_SERIAL=SIGMACH1P_USB_Keykoard
ID_TYPE=hid
ID_USB_DRIVER=usbhid
ID_USB_INTERFACES=:030101:030000:
ID_USB_INTERFACE_NUM=01
ID_VENDOR=SIGMACH1P
ID_VENDOR_ENC=SIGMACH1P
ID_VENDOR_ID=1c4f
KEY=4837fff072ff32d bf54444600000000 1 20c100b17c000 267bfad941dfed 9e168000004400 10000002
MODALIAS=input:b0003v1C4Fp0002e0110-e0,1,2,3,4,k71,72,73,74,77,80,82,83,85,86,87,88,89,8A,8B,8C,8E,8F,90,96,98,9B,9C,9E,9F,A1,A3,A4,A5,A6,A7,A8,A9,AB,AC,AD,AE,B1,B2,B5,CE,CF,D0,D1,D2,D4,D8,D9,DB,E4,EA,EB,F1,100,161,162,166,16A,16E,172,174,176,178,179,17A,17B,17C,17D,17F,180,182,183,185,188,189,18C,18D,18E,18F,190,191,192,193,195,198,199,19A,1A0,1A1,1A2,1A3,1A4,1A5,1A6,1A7,1A8,1A9,1AA,1AB,1AC,1AD,1AE,1B0,1B1,1B7,1BA,r6,a20,m4,lsfw
MSC=10
NAME="SIGMACH1P USB Keykoard"
PHYS="usb-0000:09:00.0-2/input1"
PRODUCT=3/1c4f/2/110
PROP=0
REL=40
SEQNUM=1546
SUBSYSTEM=input
UDEV_LOG=3
UNIQ=""
USEC_INITIALIZED=2563044149

UDEV  [2563.391000] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/input/input17 (input)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/input/input17
EV=120013
ID_BUS=usb
ID_INPUT=1
ID_INPUT_KEY=1
ID_INPUT_KEYBOARD=1
ID_MODEL=USB_Keykoard
ID_MODEL_ENC=USB\x20Keykoard
ID_MODEL_ID=0002
ID_PATH=pci-0000:09:00.0-usb-0:2:1.0
ID_PATH_TAG=pci-0000_09_00_0-usb-0_2_1_0
ID_REVISION=0110
ID_SERIAL=SIGMACH1P_USB_Keykoard
ID_TYPE=hid
ID_USB_DRIVER=usbhid
ID_USB_INTERFACES=:030101:030000:
ID_USB_INTERFACE_NUM=00
ID_VENDOR=SIGMACH1P
ID_VENDOR_ENC=SIGMACH1P
ID_VENDOR_ID=1c4f
KEY=1000000000007 ff800000000007ff febeffdff3cfffff fffffffffffffffe
LED=7
MODALIAS=input:b0003v1C4Fp0002e0110-e0,1,4,11,14,k71,72,73,74,75,77,79,7A,7B,7C,7D,7E,7F,80,81,82,83,84,85,86,87,88,89,8A,B7,B8,B9,BA,BB,BC,BD,BE,BF,C0,C1,C2,F0,ram4,l0,1,2,sfw
MSC=10
NAME="SIGMACH1P USB Keykoard"
PHYS="usb-0000:09:00.0-2/input0"
PRODUCT=3/1c4f/2/110
PROP=0
SEQNUM=1541
SUBSYSTEM=input
UDEV_LOG=3
UNIQ=""
USEC_INITIALIZED=2563040766

UDEV  [2563.410790] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/input/input18/event7 (input)
ACTION=add
BACKSPACE=guess
DEVLINKS=/dev/input/by-id/usb-SIGMACH1P_USB_Keykoard-event-if01 /dev/input/by-path/pci-0000:09:00.0-usb-0:2:1.1-event
DEVNAME=/dev/input/event7
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.1/input/input18/event7
ID_BUS=usb
ID_INPUT=1
ID_INPUT_KEY=1
ID_MODEL=USB_Keykoard
ID_MODEL_ENC=USB\x20Keykoard
ID_MODEL_ID=0002
ID_PATH=pci-0000:09:00.0-usb-0:2:1.1
ID_PATH_TAG=pci-0000_09_00_0-usb-0_2_1_1
ID_REVISION=0110
ID_SERIAL=SIGMACH1P_USB_Keykoard
ID_TYPE=hid
ID_USB_DRIVER=usbhid
ID_USB_INTERFACES=:030101:030000:
ID_USB_INTERFACE_NUM=01
ID_VENDOR=SIGMACH1P
ID_VENDOR_ENC=SIGMACH1P
ID_VENDOR_ID=1c4f
MAJOR=13
MINOR=71
SEQNUM=1547
SUBSYSTEM=input
UDEV_LOG=3
USEC_INITIALIZED=2563239989
XKBLAYOUT=tr
XKBMODEL=pc105
XKBOPTIONS=lv3:ralt_switch

UDEV  [2563.576817] add      /devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/input/input17/event6 (input)
ACTION=add
BACKSPACE=guess
DEVLINKS=/dev/input/by-id/usb-SIGMACH1P_USB_Keykoard-event-kbd /dev/input/by-path/pci-0000:09:00.0-usb-0:2:1.0-event-kbd
DEVNAME=/dev/input/event6
DEVPATH=/devices/pci0000:00/0000:00:1c.4/0000:09:00.0/usb2/2-2/2-2:1.0/input/input17/event6
ID_BUS=usb
ID_INPUT=1
ID_INPUT_KEY=1
ID_INPUT_KEYBOARD=1
ID_MODEL=USB_Keykoard
ID_MODEL_ENC=USB\x20Keykoard
ID_MODEL_ID=0002
ID_PATH=pci-0000:09:00.0-usb-0:2:1.0
ID_PATH_TAG=pci-0000_09_00_0-usb-0_2_1_0
ID_REVISION=0110
ID_SERIAL=SIGMACH1P_USB_Keykoard
ID_TYPE=hid
ID_USB_DRIVER=usbhid
ID_USB_INTERFACES=:030101:030000:
ID_USB_INTERFACE_NUM=00
ID_VENDOR=SIGMACH1P
ID_VENDOR_ENC=SIGMACH1P
ID_VENDOR_ID=1c4f
MAJOR=13
MINOR=70
SEQNUM=1542
SUBSYSTEM=input
UDEV_LOG=3
USEC_INITIALIZED=2563392826
XKBLAYOUT=tr
XKBMODEL=pc105
XKBOPTIONS=lv3:ralt_switch

EDIT FOR SHW POST

System info

Distributor ID: Debian Description: Debian GNU/Linux 7.2 (wheezy) Release: 7.2 Codename: wheezy

udev version 175

Unbind keyboard syslog result

Jan 16 13:47:50  acpid: input device has been disconnected, fd 13
Jan 16 13:47:51  kernel: [  694.216123] usb 1-1.3: USB disconnect, device number 17
Jan 16 13:47:51  acpid: input device has been disconnected, fd 15
Jan 16 13:47:51  kernel: [  694.507848] usb 1-1.3: new low-speed USB device number 18 using ehci_hcd
Jan 16 13:47:51  kernel: [  694.606225] usb 1-1.3: New USB device found, idVendor=1c4f, idProduct=0002
Jan 16 13:47:51  kernel: [  694.606235] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 13:47:51  kernel: [  694.606242] usb 1-1.3: Product: USB Keykoard
Jan 16 13:47:51  kernel: [  694.606246] usb 1-1.3: Manufacturer: SIGMACH1P
Jan 16 13:47:51  kernel: [  694.609792] input: SIGMACH1P USB Keykoard as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input57
Jan 16 13:47:51  kernel: [  694.610190] generic-usb 0003:1C4F:0002.0027: input,hidraw2: USB HID v1.10 Keyboard [SIGMACH1P USB Keykoard] on usb-0000:00:1a.0-1.3/input0
Jan 16 13:47:51  kernel: [  694.613248] input: SIGMACH1P USB Keykoard as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.1/input/input58
Jan 16 13:47:51  kernel: [  694.613646] generic-usb 0003:1C4F:0002.0028: input,hidraw3: USB HID v1.10 Device [SIGMACH1P USB Keykoard] on usb-0000:00:1a.0-1.3/input1
Jan 16 13:47:51  mtp-probe: checking bus 1, device 18: "/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3"
Jan 16 13:47:51  mtp-probe: bus: 1, device: 18 was not an MTP device

Admin over 10 years

unfortunately customer requirement. they want to manage keyboards.
Admin over 10 years

They want to be able to manually switch between connected keyboards? How would you do this through udev? It only detects when devices are plugged in/out. When exactly do you want the device to be disabled? Do you simply want it to be always ignored?
Admin over 10 years

they want to disable or enable keyboard dynamically. i am using udev for detect the device. i can get all information of device when plug or unplug via udev. i am searching alternative way to disable/enable keyboard dynamically. obviously, scenario - when user plug a externall keyboard i am looking user permission and if he has not permission i am disabling the keyboard if he has enabling.

ibasaran over 10 years

thanks for your reply slm. i know we can disable keyboard via xinput but how can i get id information from udev ?
slm over 10 years

@ibasaran - you have to go through the output you posted and determine which device is your keyboard. You can then make a corresponding .rules file and place it in /etc/udev/rules.d/. The key info is the rule needs to have OPTIONS+="ignore_device" in it so that UDEV will effectively disable the keyboard device.
ibasaran over 10 years

sorry for late reply, ignore_device not working anymore. lists.ubuntu.com/archives/kubuntu-users/2010-November/…
slm over 10 years

@ibasaran - can you elaborate please? Not working how?
ibasaran over 10 years

lwn.net/Articles/364728 No longer exists "ignore device"
ibasaran over 10 years

Thnks for your replay SHW. Right, this way disabling my keyboard. But one problem, i unbind my keyboard after few seconds it authomatically binds again.
SHW over 10 years

IIRC, only UDEV can bind the hardware. By any chance, are you reloading the rules OR restarting the UDEVD ?
ibasaran over 10 years

Right when i unbind device, udev binding again but i am not reloadig rules again. it is happing automatically.
ibasaran over 10 years

also i unbind a storage. storage not binding again but keyboard binding again.
SHW over 10 years

I tried at my (custom) distro. It works as expected for USB keyboard. Udev version 197 is here. Can you post dmesg output and/or /var/log/syslog file content ?
ibasaran over 10 years

edited orginal post syslog output.
SHW over 10 years

Just for cross-checking UDEV version, can you exercise this on new LIVE OS ?
ibasaran over 10 years

also i checked ubuntu 12.04 udev version. it is 175. i will try to upgrade udev for testing.
Svartalf over 9 years

The "rebind again" issue is that udev sees the keyboard and re-binds it. (Makes for a nice reset for my little project) It's a feature/misfeature of how it sees input devices.