Couldn't determine keyboard device. :/ about logkeys HOT 32 CLOSED

Thanks!

Until 'Logitech USB Receiver' gets added, you can follow
http://code.google.com/p/logkeys/wiki/Documentation#Empty_log_file_or_%27Couldn%
27t_determine_keyboard_device&
to get it going.

Same issue different HW

sudo logkeys --start --output test.log

logkeys: Couldn't determine keyboard device. :/
logkeys: Please post contents of your /proc/bus/input/devices file as a new bug 
report. Thanks!
cat /proc/bus/input/devices
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: EV=3
B: KEY=10000000000000 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: EV=3
B: KEY=10000000000000 0

I: Bus=0017 Vendor=0001 Product=0001 Version=0100
N: Name="Macintosh mouse button emulation"
P: Phys=
S: Sysfs=/devices/virtual/input/input2
U: Uniq=
H: Handlers=mouse0 event2 
B: EV=7
B: KEY=70000 0 0 0 0
B: REL=3

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v6.0"
P: Phys=usb-0000:00:1d.7-6.1/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.7/usb2/2-6/2-6.1/2-6.1:1.0/input/input3
U: Uniq=
H: Handlers=kbd event3 
B: EV=120013
B: KEY=1000000000007 ff800000000007ff febeffdff3cfffff fffffffffffffffe
B: MSC=10
B: LED=7

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v6.0"
P: Phys=usb-0000:00:1d.7-6.1/input1
S: Sysfs=/devices/pci0000:00/0000:00:1d.7/usb2/2-6/2-6.1/2-6.1:1.1/input/input4
U: Uniq=
H: Handlers=kbd mouse1 event4 
B: EV=1f
B: KEY=837fff002c3027 bf00444400000000 1f0001 f848a27c000 667bfad9415fed 
8e000000000000 0
B: REL=3c3
B: ABS=100000000
B: MSC=10

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v6.0"
P: Phys=usb-0000:00:1d.7-6.1/input2
S: Sysfs=/devices/pci0000:00/0000:00:1d.7/usb2/2-6/2-6.1/2-6.1:1.2/input/input5
U: Uniq=
H: Handlers=kbd event5 js0 
B: EV=10001f
B: KEY=837fff002c3027 bf00444400000000 c00000000000001 10f848a27c007 
ffff7bfad941dfff febeffdfffefffff fffffffffffffffe
B: REL=40
B: ABS=ffffff01000701ff
B: MSC=10

I: Bus=0003 Vendor=041e Product=4063 Version=0100
N: Name="VF0410 Live! Cam Video IM Pro"
P: Phys=usb-0000:00:1d.7-4/button
S: Sysfs=/devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/input/input6
U: Uniq=
H: Handlers=kbd event6 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0001 Vendor=10ec Product=0885 Version=0001
N: Name="HDA Digital PCBeep"
P: Phys=card0/codec#2/beep0
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/input/input7
U: Uniq=
H: Handlers=kbd event7 
B: EV=40001
B: SND=6

Forgot to add to Comment 2 above:

logkeys --help: logkeys version: 0.1.1a
uname -a  2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64 
GNU/Linux

[deleted comment]

[deleted comment]

[deleted comment]

Same issue different HW

sudo logkeys --start --output test.log

logkeys: Couldn't determine keyboard device. :/
logkeys: Please post contents of your /proc/bus/input/devices file as a new bug 
report. Thanks!

/proc/bus/input/devices and dumpkeys.ouput are attached.

the correct device is /dev/input/event3

logkeys --help: 0.1.1a
Ubuntu 10.04 lucid

I: Bus=0019 Vendor=0000 Product=0003 Version=0000
N: Name="Sleep Button"
P: Phys=PNP0C0E/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: EV=3
B: KEY=4000 0 0 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input2
U: Uniq=
H: Handlers=kbd event2 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0003 Vendor=04fc Product=05d8 Version=0100
N: Name="MLK Trust Deskset 16593"
P: Phys=usb-0000:00:10.1-2/input0
S: Sysfs=/devices/pci0000:00/0000:00:10.1/usb3/3-2/3-2:1.0/input/input3
U: Uniq=
H: Handlers=sysrq kbd event3 
B: EV=120013
B: KEY=10000 7 ff9f207a c14057ff febeffdf ffefffff ffffffff fffffffe
B: MSC=10
B: LED=1f

I: Bus=0003 Vendor=04fc Product=05d8 Version=0100
N: Name="MLK Trust Deskset 16593"
P: Phys=usb-0000:00:10.1-2/input1
S: Sysfs=/devices/pci0000:00/0000:00:10.1/usb3/3-2/3-2:1.1/input/input4
U: Uniq=
H: Handlers=kbd mouse0 event4 
B: EV=1f
B: KEY=837fff 2c3027 bf004444 0 0 1f0001 f84 8b27c000 667bfa d941dfed 9e0000 0 
0 0
B: REL=1c3
B: ABS=1 0
B: MSC=10

I: Bus=0003 Vendor=0ac8 Product=3450 Version=0900
N: Name="Vimicro USB Camera (Altair)"
P: Phys=usb-0000:00:10.4-3/button
S: Sysfs=/devices/pci0000:00/0000:00:10.4/usb1/1-3/1-3:1.0/input/input5
U: Uniq=
H: Handlers=kbd event5 
B: EV=3
B: KEY=100000 0 0 0 0 0 0

logkeys: Couldn't determine keyboard device. :/
logkeys: Please post contents of your /proc/bus/input/devices file as a new bug 
report. Thanks!

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0003 Vendor=1532 Product=0109 Version=0110
N: Name="Razer Razer Lycosa"
P: Phys=usb-0000:00:03.0-1/input0
S: Sysfs=/devices/pci0000:00/0000:00:03.0/usb2/2-1/2-1:1.0/input/input2
U: Uniq=
H: Handlers=sysrq kbd event2 
B: EV=120013
B: KEY=10000 7 ff800000 7ff febeffdf f3cfffff ffffffff fffffffe
B: MSC=10
B: LED=7

I: Bus=0003 Vendor=1532 Product=0109 Version=0110
N: Name="Razer Razer Lycosa"
P: Phys=usb-0000:00:03.0-1/input1
S: Sysfs=/devices/pci0000:00/0000:00:03.0/usb2/2-1/2-1:1.1/input/input3
U: Uniq=
H: Handlers=kbd event3 
B: EV=1f
B: KEY=837fff 2c3027 bf004444 0 0 1 c04 b27c000 267bfa d941dfed 9e0000 0 0 0
B: REL=40
B: ABS=1 0
B: MSC=10

I: Bus=0003 Vendor=1532 Product=001c Version=0111
N: Name="Razer  Razer Abyssus"
P: Phys=usb-0000:00:03.1-1/input0
S: Sysfs=/devices/pci0000:00/0000:00:03.1/usb3/3-1/3-1:1.0/input/input4
U: Uniq=
H: Handlers=mouse0 event4 
B: EV=17
B: KEY=7f0000 0 0 0 0 0 0 0 0
B: REL=103
B: MSC=10

Issue 67 has been merged into this issue.

Issue 68 has been merged into this issue.

Issue 43 has been merged into this issue.

Issue 69 has been merged into this issue.

Issue 74 has been merged into this issue.

Same issue here, I'm on a USB keyboard: 
http://www.cherrycorp.com/english/keyboards/security/Smart_Card_Keyboards/index.
htm

Correct device is, as you can see, device #0.

% cat /proc/bus/input/devices     [1]
I: Bus=0003 Vendor=046a Product=0010 Version=0111
N: Name="Cherry GmbH SmartBoard XX44"
P: Phys=usb-0000:00:13.0-1/input0
S: Sysfs=/devices/pci0000:00/0000:00:13.0/usb7/7-1/7-1:1.0/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: PROP=0
B: EV=120013
B: KEY=e080ffdf01cfffff fffffffffffffffe
B: MSC=10
B: LED=1f

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input2
U: Uniq=
H: Handlers=kbd event2 
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3
U: Uniq=
H: Handlers=kbd event3 
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA NVidia HDMI/DP"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:02.0/0000:05:00.1/sound/card1/input4
U: Uniq=
H: Handlers=event4 
B: PROP=0
B: EV=21
B: SW=100

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA NVidia HDMI/DP"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:02.0/0000:05:00.1/sound/card1/input5
U: Uniq=
H: Handlers=event5 
B: PROP=0
B: EV=21
B: SW=100

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA NVidia HDMI/DP"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:02.0/0000:05:00.1/sound/card1/input6
U: Uniq=
H: Handlers=event6 
B: PROP=0
B: EV=21
B: SW=100

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA NVidia HDMI/DP"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:02.0/0000:05:00.1/sound/card1/input7
U: Uniq=
H: Handlers=event7 
B: PROP=0
B: EV=21
B: SW=100

I: Bus=0003 Vendor=062a Product=0252 Version=0110
N: Name="Logitech  USB WheelMouse     "
P: Phys=usb-0000:00:12.0-5/input0
S: Sysfs=/devices/pci0000:00/0000:00:12.0/usb6/6-5/6-5:1.0/input/input9
U: Uniq=
H: Handlers=mouse0 event1 
B: PROP=0
B: EV=17
B: KEY=1f0000 0 0 0 0
B: REL=143
B: MSC=10

Issue 78 has been merged into this issue.

as of now, this issue is fixed in SVN (revision 92). we found a new heuristic 
that more robustly provides the event id than grepping for device name as we 
were before.
can somebody please confirm it works. :)

Issue 79 has been merged into this issue.

Issue 82 has been merged into this issue.

*event6 is the keyboard

What steps will reproduce the problem?
1.sudo logkeys --start --output test.log --device /dev/input/event6


What do you see instead?
not logging keystrokes


/proc/bus/input/devices:

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: EV=3
B: KEY=10000000000000 0

I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/PNP0C0D:00/input/input1
U: Uniq=
H: Handlers=event1 
B: EV=21
B: SW=1

I: Bus=0019 Vendor=0000 Product=0003 Version=0000
N: Name="Sleep Button"
P: Phys=PNP0C0E/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/PNP0C0E:00/input/input2
U: Uniq=
H: Handlers=kbd event2 
B: EV=3
B: KEY=4000 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3
U: Uniq=
H: Handlers=kbd event3 
B: EV=3
B: KEY=10000000000000 0

I: Bus=0011 Vendor=0001 Product=0001 Version=ab41
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/devices/platform/i8042/serio0/input/input4
U: Uniq=
H: Handlers=sysrq kbd event4 
B: EV=120013
B: KEY=10000 c020000000000 0 0 700f02000003 3803078f830f401 febfffdfffefffff 
fffffffffffffffe
B: MSC=10
B: LED=7

I: Bus=0003 Vendor=15d9 Product=0a4d Version=0111
N: Name=" USB OPTICAL MOUSE"
P: Phys=usb-0000:00:1d.0-1.2.3/input0
S: 
Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.3/2-1.2.3:1.0/input/
input5
U: Uniq=
H: Handlers=mouse0 event5 
B: EV=17
B: KEY=70000 0 0 0 0
B: REL=103
B: MSC=10

I: Bus=0003 Vendor=0a81 Product=0101 Version=0110
N: Name="CHESEN USB Keyboard"
P: Phys=usb-0000:00:1d.0-1.2.4/input0
S: 
Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.4/2-1.2.4:1.0/input/
input6
U: Uniq=
H: Handlers=sysrq kbd event6 
B: EV=120013
B: KEY=1000000000007 ff9f207ac14057ff febeffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=1f

I: Bus=0003 Vendor=0a81 Product=0101 Version=0110
N: Name="CHESEN USB Keyboard"
P: Phys=usb-0000:00:1d.0-1.2.4/input1
S: 
Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.4/2-1.2.4:1.1/input/
input7
U: Uniq=
H: Handlers=kbd event7 
B: EV=13
B: KEY=2020000 3878d801d001 1e000000000000 0
B: MSC=10

I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: 
Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:08/LNXVIDEO:01/input/in
put8
U: Uniq=
H: Handlers=kbd event8 
B: EV=3
B: KEY=3e000b00000000 0 0 0

I: Bus=0003 Vendor=0402 Product=9665 Version=0009
N: Name="1.3M WebCam"
P: Phys=usb-0000:00:1a.0-1.1/button
S: Sysfs=/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1:1.0/input/input9
U: Uniq=
H: Handlers=kbd event9 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0011 Vendor=0002 Product=0007 Version=01b1
N: Name="SynPS/2 Synaptics TouchPad"
P: Phys=isa0060/serio2/input0
S: Sysfs=/devices/platform/i8042/serio2/input/input10
U: Uniq=
H: Handlers=mouse1 event10 
B: EV=b
B: KEY=420 3000f 0 0 0 0
B: ABS=11000003


What version of the product are you using (`logkeys --help`)?
0.1.0


On what operating system?
2.6.35-22-generic #33-Ubuntu 10.10 SMP x86_64 GNU/Linux

Hi,

for my DELL L100 keyboard I use the command 

logkeys -d event3 -m -s /home/fr.map -o ...

Regards

uname -a 

Linux 2.6.31-15-generic #50-Ubuntu SMP Tue Nov 10 14:54:29 UTC 2009 i686 
Gnu/Linux

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0003 Vendor=046d Product=c518 Version=0111
N: Name="Logitech USB Receiver"
P: Phys=usb-0000:00:1d.0-2/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input2
U: Uniq=
H: Handlers=mouse0 event2 
B: EV=17
B: KEY=ffff0000 0 0 0 0 0 0 0 0
B: REL=143
B: MSC=10

I: Bus=0003 Vendor=046d Product=c518 Version=0111
N: Name="Logitech USB Receiver"
P: Phys=usb-0000:00:1d.0-2/input1
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input3
U: Uniq=
H: Handlers=kbd event3 
B: EV=1f
B: KEY=837fff 2c3027 bf004444 0 0 1 f84 8b27c000 667bfa d9415fed 8e0000 0 0 0
B: REL=40
B: ABS=1 0
B: MSC=10

I: Bus=0003 Vendor=04fc Product=05d8 Version=0100
N: Name="MLK Targus"
P: Phys=usb-0000:00:1d.3-2/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.3/usb5/5-2/5-2:1.0/input/input4
U: Uniq=
H: Handlers=sysrq kbd event4 
B: EV=120013
B: KEY=10000 7 ff9f207a c14057ff febeffdf ffefffff ffffffff fffffffe
B: MSC=10
B: LED=1f

I: Bus=0003 Vendor=04fc Product=05d8 Version=0100
N: Name="MLK Targus"
P: Phys=usb-0000:00:1d.3-2/input1
S: Sysfs=/devices/pci0000:00/0000:00:1d.3/usb5/5-2/5-2:1.1/input/input5
U: Uniq=
H: Handlers=kbd mouse1 event5 
B: EV=1f
B: KEY=837fff 2c3027 bf004444 0 0 1f0001 f84 8b27c000 667bfa d941dfed 9e0000 0 
0 0
B: REL=1c3
B: ABS=1 0
B: MSC=10

*event4 is the keyboard [Acer laptop]

What steps will reproduce the problem?
1.sudo logkeys -s -o /tmp/foo.log -d /dev/input/event4


What do you see instead?
not logging keystrokes, no messages in log file


/proc/bus/input/devices: [see attached file]


What version of the product are you using (`logkeys --help`)?
0.1.0


On what operating system?
3.5.0-17-generic #26-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux

What steps will reproduce the problem?
1. sudo logkeys -s
2. What is the expected output? 
To log ;-)
3. What do you see instead?

# logkeys -s
logkeys: Couldn't determine keyboard device. :/
logkeys: Please post contents of your /proc/bus/input/devices file as a new bug 
report. Thanks!

# cat  /proc/bus/input/devices
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v8.0"
P: Phys=usb-0000:00:14.0-2/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/input/input2
U: Uniq=
H: Handlers=kbd event2 
B: PROP=0
B: EV=120013
B: KEY=1000000000007 ff800000000007ff febeffdff3cfffff fffffffffffffffe
B: MSC=10
B: LED=7

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v8.0"
P: Phys=usb-0000:00:14.0-2/input1
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/input/input3
U: Uniq=
H: Handlers=kbd mouse0 event3 
B: PROP=0
B: EV=1f
B: KEY=4837fff072ff32d bf54444600000000 1f0001 20f908b17c000 677bfad9415fed 
9ed68000004400 10000002
B: REL=3c3
B: ABS=100000000
B: MSC=10

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v8.0"
P: Phys=usb-0000:00:14.0-2/input2
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.2/input/input4
U: Uniq=
H: Handlers=kbd event4 js0 
B: PROP=0
B: EV=10001f
B: KEY=4c37fff072ff32d bf54445600000000 c00000000000001 30f908b17c007 
ffff7bfad951dfff febeffdfffefffff fffffffffffffffe
B: REL=40
B: ABS=ffffff01000701ff
B: MSC=10

I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name="PC Speaker"
P: Phys=isa0061/input0
S: Sysfs=/devices/platform/pcspkr/input/input5
U: Uniq=
H: Handlers=kbd event5 
B: PROP=0
B: EV=40001
B: SND=6

I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="HP WMI hotkeys"
P: Phys=wmi/input0
S: Sysfs=/devices/virtual/input/input6
U: Uniq=
H: Handlers=kbd event6 
B: PROP=0
B: EV=33
B: KEY=4000000000 0 1000700000000 2100400 0 0
B: MSC=10
B: SW=22

I: Bus=0001 Vendor=10ec Product=0221 Version=0001
N: Name="HDA Digital PCBeep"
P: Phys=card0/codec#0/beep0
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/input/input7
U: Uniq=
H: Handlers=kbd event7 
B: PROP=0
B: EV=40001
B: SND=6

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input8
U: Uniq=
H: Handlers=event8 
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Line"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input9
U: Uniq=
H: Handlers=event9 
B: PROP=0
B: EV=21
B: SW=2000

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input10
U: Uniq=
H: Handlers=event10 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Front Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input11
U: Uniq=
H: Handlers=event11 
B: PROP=0
B: EV=21
B: SW=4

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Line Out"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input12
U: Uniq=
H: Handlers=event12 
B: PROP=0
B: EV=21
B: SW=40

# cat /etc/SuSE-release
openSUSE 12.2 (x86_64)
VERSION = 12.2
CODENAME = Mantis

logkeys: Couldn't determine keyboard device. :/
logkeys: Please post contents of your /proc/bus/input/devices file as a new bug 
report. Thanks!
tmp@tmp-945GCM-S2C:~$ cat /proc/bus/input/devices 
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0003 Vendor=046d Product=c063 Version=0110
N: Name="DELL DELL USB Laser Mouse"
P: Phys=usb-0000:00:1d.0-1/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/input/input2
U: Uniq=
H: Handlers=mouse0 event2 
B: PROP=0
B: EV=17
B: KEY=ff0000 0 0 0 0
B: REL=143
B: MSC=10

I: Bus=0003 Vendor=0e8f Product=0022 Version=0110
N: Name="GASIA USB KB V11"
P: Phys=usb-0000:00:1d.0-2/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input3
U: Uniq=
H: Handlers=sysrq kbd event3 
B: PROP=0
B: EV=120013
B: KEY=1000000000007 ff800000000007ff febeffdff3cfffff fffffffffffffffe
B: MSC=10
B: LED=7

I: Bus=0003 Vendor=0e8f Product=0022 Version=0110
N: Name="GASIA USB KB V11"
P: Phys=usb-0000:00:1d.0-2/input1
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input4
U: Uniq=
H: Handlers=kbd event4 
B: PROP=0
B: EV=1f
B: KEY=4837fff072ff32d bf54444600000000 1 20c100b17c000 267bfad941dfed 
9e168000004400 10000002
B: REL=40
B: ABS=100000000
B: MSC=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel Line"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input5
U: Uniq=
H: Handlers=event5 
B: PROP=0
B: EV=21
B: SW=2000

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel Front Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input6
U: Uniq=
H: Handlers=event6 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel Rear Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input7
U: Uniq=
H: Handlers=event7 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel Front Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input8
U: Uniq=
H: Handlers=event8 
B: PROP=0
B: EV=21
B: SW=4

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel Line Out"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card0/input9
U: Uniq=
H: Handlers=event9 
B: PROP=0
B: EV=21
B: SW=40

tmp@tmp-945GCM-S2C:~$ 

[deleted comment]

logkeys version: 0.1.1a
Linux tmp-945GCM-S2C 3.5.0-27-generic #46-Ubuntu SMP Mon Mar 25 19:58:17 UTC 
2013 x86_64 x86_64 x86_64 GNU/Linux

1. sudo logkeys -u --start  --device=event3
2. A logfile
3. An empty logfile
cat /proc/bus/input/devices

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0003 Vendor=046d Product=c069 Version=0110
N: Name="Logitech USB Laser Mouse"
P: Phys=usb-0000:00:10.1-1.3/input0
S: Sysfs=/devices/pci0000:00/0000:00:10.1/usb8/8-1/8-1.3/8-1.3:1.0/input/input2
U: Uniq=
H: Handlers=mouse0 event2 
B: PROP=0
B: EV=17
B: KEY=ff0000 0 0 0 0 0 0 0 0
B: REL=143
B: MSC=10

I: Bus=0003 Vendor=046d Product=c318 Version=0111
N: Name="Logitech Logitech Illuminated Keyboard"
P: Phys=usb-0000:00:10.1-1.4.3/input0
S: 
Sysfs=/devices/pci0000:00/0000:00:10.1/usb8/8-1/8-1.4/8-1.4.3/8-1.4.3:1.0/input/
input3
U: Uniq=
H: Handlers=sysrq kbd event3 
B: PROP=0
B: EV=120013
B: KEY=10000 7 ff9f207a c14057ff febeffdf ffefffff ffffffff fffffffe
B: MSC=10
B: LED=1f

I: Bus=0003 Vendor=046d Product=c318 Version=0111
N: Name="Logitech Logitech Illuminated Keyboard"
P: Phys=usb-0000:00:10.1-1.4.3/input1
S: 
Sysfs=/devices/pci0000:00/0000:00:10.1/usb8/8-1/8-1.4/8-1.4.3/8-1.4.3:1.1/input/
input4
U: Uniq=
H: Handlers=kbd event4 
B: PROP=0
B: EV=1f
B: KEY=4837fff 72ff32d bf544446 0 0 1 20f90 8b17c000 677bfa d9415fed 9ed680 
4400 0 10000002
B: REL=40
B: ABS=1 0
B: MSC=10

I: Bus=0003 Vendor=056a Product=0069 Version=0200
N: Name="Wacom Bamboo1"
P: Phys=
S: 
Sysfs=/devices/pci0000:00/0000:00:10.1/usb8/8-1/8-1.4/8-1.4.1/8-1.4.1:1.0/input/
input5
U: Uniq=
H: Handlers=mouse1 event5 
B: PROP=1
B: EV=f
B: KEY=1c43 0 70000 0 0 0 0 0 0 0 0
B: REL=100
B: ABS=100 1000003

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:01.1/sound/card0/input6
U: Uniq=
H: Handlers=event6 
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Line"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input7
U: Uniq=
H: Handlers=event7 
B: PROP=0
B: EV=21
B: SW=2000

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Rear Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input8
U: Uniq=
H: Handlers=event8 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Front Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input9
U: Uniq=
H: Handlers=event9 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Front Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input10
U: Uniq=
H: Handlers=event10 
B: PROP=0
B: EV=21
B: SW=4

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Line Out CLFE"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input11
U: Uniq=
H: Handlers=event11 
B: PROP=0
B: EV=21
B: SW=40

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Line Out Surround"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input12
U: Uniq=
H: Handlers=event12 
B: PROP=0
B: EV=21
B: SW=40

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Line Out Front"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input13
U: Uniq=
H: Handlers=event13 
B: PROP=0
B: EV=21
B: SW=40

root@FiDaTo:/home/waheguru# logkeys -s
logkeys: Couldn't determine keyboard device. :/
logkeys: Please post contents of your /proc/bus/input/devices file as a new bug 
report. Thanks!
root@FiDaTo:/home/waheguru# cat /proc/bus/input/devices
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0003 Vendor=04ca Product=0060 Version=0110
N: Name="SONiX USB Device"
P: Phys=usb-0000:00:16.0-4/input0
S: Sysfs=/devices/pci0000:00/0000:00:16.0/usb7/7-4/7-4:1.0/input/input2
U: Uniq=
H: Handlers=sysrq kbd event2 
B: PROP=0
B: EV=120013
B: KEY=10000 7 ff800000 7ff febeffdf ffefffff ffffffff fffffffe
B: MSC=10
B: LED=1f

I: Bus=0003 Vendor=04ca Product=0060 Version=0100
N: Name="SONiX USB Device"
P: Phys=usb-0000:00:16.0-4/input1
S: Sysfs=/devices/pci0000:00/0000:00:16.0/usb7/7-4/7-4:1.1/input/input3
U: Uniq=
H: Handlers=kbd mouse0 event3 
B: PROP=0
B: EV=10001f
B: KEY=4837fff 72ff32d bf544446 0 0 1f0001 20c13 b17c000 267bfa d941dfed 9e1680 
4400 0 10000002
B: REL=1c3
B: ABS=1 0
B: MSC=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Front Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card0/input4
U: Uniq=
H: Handlers=event4 
B: PROP=0
B: EV=21
B: SW=4

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Line Out"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card0/input5
U: Uniq=
H: Handlers=event5 
B: PROP=0
B: EV=21
B: SW=40

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Line"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card0/input6
U: Uniq=
H: Handlers=event6 
B: PROP=0
B: EV=21
B: SW=2000

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Rear Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card0/input7
U: Uniq=
H: Handlers=event7 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Front Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card0/input8
U: Uniq=
H: Handlers=event8 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Eee PC WMI hotkeys"
P: Phys=eeepc-wmi/input0
S: Sysfs=/devices/platform/eeepc-wmi/input/input9
U: Uniq=
H: Handlers=rfkill kbd event9 
B: PROP=0
B: EV=100013
B: KEY=7e40000 0 0 8000 0 0 0 0 0 1400b 100000 3001800 1100800 e0000 0 0 2
B: MSC=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:02.0/0000:01:00.1/sound/card1/input10
U: Uniq=
H: Handlers=event10 
B: PROP=0
B: EV=21
B: SW=140

Correct Event Id was event1
Output of /proc/bus/input/devices

I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name="PC Speaker"
P: Phys=isa0061/input0
S: Sysfs=/class/input/input3
H: Handlers=kbd event3 
B: EV=40001
B: SND=6

I: Bus=0003 Vendor=093a Product=2510 Version=0100
N: Name="PIXART USB OPTICAL MOUSE"
P: Phys=usb-0000:00:1d.0-1.1/input0
S: Sysfs=/class/input/input7
H: Handlers=mouse0 event0 
B: EV=7
B: KEY=70000 0 0 0 0
B: REL=103

I: Bus=0003 Vendor=04d9 Product=1603 Version=0310
N: Name="  USB Keyboard"
P: Phys=usb-0000:00:1d.0-1.2/input0
S: Sysfs=/class/input/input8
H: Handlers=kbd event1 
B: EV=120003
B: KEY=1000000000007 ff800000000007ff febeffdff3cfffff fffffffffffffffe
B: LED=7

I: Bus=0003 Vendor=04d9 Product=1603 Version=0310
N: Name="  USB Keyboard"
P: Phys=usb-0000:00:1d.0-1.2/input1
S: Sysfs=/class/input/input9
H: Handlers=kbd event2 
B: EV=3
B: KEY=39fad801d101 1e000000000000 0

What steps will reproduce the problem?
1. logkeys --start --device=event2
2.
3.

What is the expected output? To log ;-)
What do you see instead?

Without --device : an error, with --device with the good device : empty log 
file..

Le device is event2.

Output of /proc/bus/input/devices

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v8.0"
P: Phys=usb-0000:00:12.0-5/input0
S: Sysfs=/devices/pci0000:00/0000:00:12.0/usb4/4-5/4-5:1.0/input/input2
U: Uniq=
H: Handlers=sysrq kbd event2 
B: PROP=0
B: EV=120013
B: KEY=10000 7 ff800000 7ff febeffdf f3cfffff ffffffff fffffffe
B: MSC=10
B: LED=7

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v8.0"
P: Phys=usb-0000:00:12.0-5/input1
S: Sysfs=/devices/pci0000:00/0000:00:12.0/usb4/4-5/4-5:1.1/input/input3
U: Uniq=
H: Handlers=kbd mouse0 event3 
B: PROP=0
B: EV=1f
B: KEY=4837fff 72ff32d bf544446 0 0 1f0001 20f90 8b17c000 677bfa d9415fed 
9ed680 4400 0 10000002
B: REL=3c3
B: ABS=1 0
B: MSC=10

I: Bus=0003 Vendor=045e Product=0745 Version=0111
N: Name="Microsoft Microsoft® 2.4GHz Transceiver v8.0"
P: Phys=usb-0000:00:12.0-5/input2
S: Sysfs=/devices/pci0000:00/0000:00:12.0/usb4/4-5/4-5:1.2/input/input4
U: Uniq=
H: Handlers=sysrq kbd event4 js0 
B: PROP=0
B: EV=10001f
B: KEY=4c37fff 72ff32d bf544456 0 c000000 1 30f90 8b17c007 ffff7bfa d951dfff 
febeffdf ffefffff ffffffff fffffffe
B: REL=40
B: ABS=ffffff01 701ff
B: MSC=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:01.1/sound/card0/input5
U: Uniq=
H: Handlers=event5 
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Line"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input6
U: Uniq=
H: Handlers=event6 
B: PROP=0
B: EV=21
B: SW=2000

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Rear Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input7
U: Uniq=
H: Handlers=event7 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Front Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input8
U: Uniq=
H: Handlers=event8 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Front Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input9
U: Uniq=
H: Handlers=event9 
B: PROP=0
B: EV=21
B: SW=4

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA ATI SB Line Out"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:14.2/sound/card1/input10
U: Uniq=
H: Handlers=event10 
B: PROP=0
B: EV=21
B: SW=40