long time ago
i was have history with some scanner that didn't work standalone in ps/2
keyboard port
ther is must be a keyboard so it to work
so the scanner was reflashed for working in usual serial com port
2009/8/5 Matt Causey matt.cau...@gmail.com
Hello!
Apologies if this really is't the right forum (suggestions on the
right forum would be welcome).
Our company presently operates a large number of thin client terminals
running LTSP, with a shared NFS root filesystem, and all that stuff.
To remove the external runtime dependencies from the image, I've built
a gentoo ramdisk that contains all the tools needed for the terminals
- which can be downloaded via tftp.
Things are working well - except for one problem. One the new image,
some of the input devices don't work we expected. As you might
imagine in a production environment, we have a number of different
barcode scanners that attach to these terminals. Many of the new ones
are USB HID compliant devices - which is great. Most of them are
actually serial port devices, that connect to the terminal via a
serial -- PS/2 'wedge'. The PS/2 wedge devices are the ones that
don't work correctly.
If we connect the scanner to the thin client, and boot the image, the
scanner does not work. It does not show up at all as an input device:
blablahostname / # cat /proc/bus/input/devices
I: Bus=0003 Vendor=046d Product=c001 Version=0110
N: Name=Logitech USB Mouse
P: Phys=usb-:00:03.0-1/input0
S: Sysfs=/devices/pci:00/:00:03.0/usb2/2-1/2-1:1.0/input/input0
U: Uniq=
H: Handlers=mouse0 event0
B: EV=17
B: KEY=7 0 0 0 0 0 0 0 0
B: REL=103
B: MSC=10
I: Bus=0003 Vendor=03f0 Product=0024 Version=0110
N: Name=CHICONY HP Basic USB Keyboard
P: Phys=usb-:00:03.1-2/input0
S: Sysfs=/devices/pci:00/:00:03.1/usb3/3-2/3-2:1.0/input/input1
U: Uniq=
H: Handlers=kbd event1
B: EV=120013
B: KEY=1 7 ff9f207a c14057ff febeffdf ffef fffe
B: MSC=10
B: LED=7
I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name=PC Speaker
P: Phys=isa0061/input0
S: Sysfs=/devices/platform/pcspkr/input/input2
U: Uniq=
H: Handlers=kbd event2
B: EV=40001
B: SND=6
So, I enabled debugging on the contoller driver(serio.c), and I see
that the device generates noise when connected:
[ 458.875614] drivers/input/serio/i8042.c: f2 - i8042 (kbd-data) [444989]
[ 458.908119] drivers/input/serio/i8042.c: fe - i8042 (interrupt, 0,
1, timeout) [445022]
[ 458.908144] drivers/input/serio/i8042.c: ed - i8042 (kbd-data) [445022]
[ 458.940151] drivers/input/serio/i8042.c: fe - i8042 (interrupt, 0,
1, timeout) [445054]
[ 458.940225] drivers/input/serio/i8042.c: d4 - i8042 (command) [445054]
[ 458.940234] drivers/input/serio/i8042.c: f2 - i8042 (parameter)
[445054]
[ 458.972190] drivers/input/serio/i8042.c: fe - i8042 (interrupt, 1,
12, timeout) [445086]
[ 458.972204] drivers/input/serio/i8042.c: d4 - i8042 (command) [445086]
[ 458.972212] drivers/input/serio/i8042.c: ed - i8042 (parameter)
[445086]
[ 459.004227] drivers/input/serio/i8042.c: fe - i8042 (interrupt, 1,
12, timeout) [445118]
[20171.684870] drivers/input/serio/i8042.c: 0b - i8042 (interrupt, 0,
1) [20162195]
However - the atkbd driver does not pick the device up at all.
So, I did find a workaround (which is NOT acceptable for this
deployment). Remember the PS/2 'wedge' I mentioned? Well, it has an
extra PS/2 port for your keyboard. If I connect a PS/2 keyboard to
that thing, suddenly my scanner starts working.
We see some chatter from the controller driver, then one of these:
[23811.805578] input: AT Translated Set 2 keyboard as
/devices/platform/i8042/serio0/input/input6
Aaaand a new device is registered as an input device:
yayayayhostname# cat /proc/bus/input/devices
I: Bus=0003 Vendor=046d Product=c001 Version=0110
N: Name=Logitech USB Mouse
P: Phys=usb-:00:03.0-1/input0
S: Sysfs=/devices/pci:00/:00:03.0/usb2/2-1/2-1:1.0/input/input0
U: Uniq=
H: Handlers=mouse0 event0
B: EV=17
B: KEY=7 0 0 0 0 0 0 0 0
B: REL=103
B: MSC=10
I: Bus=0003 Vendor=03f0 Product=0024 Version=0110
N: Name=CHICONY HP Basic USB Keyboard
P: Phys=usb-:00:03.1-2/input0
S: Sysfs=/devices/pci:00/:00:03.1/usb3/3-2/3-2:1.0/input/input1
U: Uniq=
H: Handlers=kbd event1
B: EV=120013
B: KEY=1 7 ff9f207a c14057ff febeffdf ffef fffe
B: MSC=10
B: LED=7
I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name=PC Speaker
P: Phys=isa0061/input0
S: Sysfs=/devices/platform/pcspkr/input/input2
U: Uniq=
H: Handlers=kbd event2
B: EV=40001
B: SND=6
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/input6
U: Uniq=
H: Handlers=kbd event3
B: EV=120013
B: KEY=4 200 3803078 f800d001 fedf ffef fffe
B: MSC=10
B: LED=7
So, I don't get it. We
