Dear

I have a question on the Slackware distribution from version 14.2, because every time I plug in a Gertec PPC920 USB PINPAD the Kernel ejects the device as if it is no longer plugged in.
I did tests on Linux Slackware 14.1 and also other distributions like Linux Mint 19 and work without problems, already with Slackware 14.2 and also with the current version of Slackware the problem occurs.

Monitoring the UDEV we can see:

root@darkstar:/u# udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[3626.013100] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb)
KERNEL[3626.015922] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb)
KERNEL[3626.017935] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/tty/ttyACM0 (tty)
KERNEL[3626.017993] bind /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb)
KERNEL[3626.018037] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.1 (usb)
KERNEL[3626.018078] bind /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.1 (usb)
KERNEL[3626.018127] bind /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb)
KERNEL[3626.086078] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/tty/ttyACM0 (tty)
KERNEL[3626.086128] unbind /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.1 (usb)
KERNEL[3626.086160] unbind /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb)
KERNEL[3626.086192] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb)
KERNEL[3626.086225] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.1 (usb)
KERNEL[3626.086639] unbind /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb)
KERNEL[3626.086690] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb)
UDEV [3626.538480] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb)
UDEV [3626.545897] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.1 (usb)
UDEV [3626.545943] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb)
UDEV [3626.546245] bind /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.1 (usb)
UDEV [3626.547268] add /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/tty/ttyACM0 (tty)
UDEV [3626.547527] bind /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb)
UDEV [3626.547720] bind /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb)
UDEV [3626.548004] unbind /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.1 (usb)
UDEV [3626.548567] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/tty/ttyACM0 (tty)
UDEV [3626.548612] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.1 (usb)
UDEV [3626.548931] unbind /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb)
UDEV [3626.549360] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0 (usb)
UDEV [3626.549570] unbind /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb)
UDEV [3626.550063] remove /devices/pci0000:00/0000:00:1d.1/usb3/3-1 (usb)

-------------------- dmesg --------------------------------

[ 900.329260] usb 3-2: new full-speed USB device number 7 using uhci_hcd
[ 900.499278] usb 3-2: Dual-Role OTG device on non-HNP port
[ 900.502284] usb 3-2: New USB device found, idVendor=1753, idProduct=c902, bcdDevice= 0.01
[ 900.502288] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 900.502292] usb 3-2: Product: PPC920 Pinpad Terminal
[ 900.502295] usb 3-2: Manufacturer: GERTEC
[ 900.505428] cdc_acm 3-2:1.0: ttyACM0: USB ACM device
[ 900.507994] usb 3-2: USB disconnect, device number 7


Anyone with any suggestions?
Thank you!

According to this blogpost,
you need a custom udev rule
I suggest adding a file "60-gertec.rules" in /etc/udev/rules.d/ containing the above rule.

Thanks Allend but this rule is not enough.

By doing several tests, I realize that I have a problem with Slackware packaging.
Using 2 computers for the tests, follow the results:

1. Computer with USB only 1.10 - No USB device works with this device.
2. Computer with USB 2.0 and 3.0 - Some USB ports work only with this device.

Now using Linux Mint 19 - Live on the same computers
1. Computer with USB only 1.10 - All USB ports working with the device.
2. Computer with USB 2.0 and 3.0 - Also all USB ports working with the device.

Slackware simply ejects the device and ignores any rule it places for the usb device.

--------------------- LINUX MINT 19 LIVE ---------------------

root@mint:~# udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[1163.504310] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1 (usb)
KERNEL[1163.507162] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0 (usb)
KERNEL[1163.509131] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/tty/ttyACM0 (tty)
KERNEL[1163.509220] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0 (usb)
KERNEL[1163.509283] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.1 (usb)
KERNEL[1163.509356] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.1 (usb)
KERNEL[1163.509447] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1 (usb)
UDEV [1163.821591] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1 (usb)
UDEV [1163.827317] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.1 (usb)
UDEV [1163.830945] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0 (usb)
UDEV [1163.833829] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.1 (usb)
UDEV [1163.837665] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/tty/ttyACM0 (tty)
UDEV [1163.849951] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0 (usb)
UDEV [1163.854187] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1 (usb)
KERNEL[1164.516377] add /devices/parport0/ppdev0.0 (parport)
KERNEL[1164.517050] bind /devices/parport0/ppdev0.0 (parport)
KERNEL[1164.517500] unbind /devices/parport0/ppdev0.0 (parport)
KERNEL[1164.517801] remove /devices/parport0/ppdev0.0 (parport)
UDEV [1164.518488] add /devices/parport0/ppdev0.0 (parport)
UDEV [1164.519576] bind /devices/parport0/ppdev0.0 (parport)
UDEV [1164.520484] unbind /devices/parport0/ppdev0.0 (parport)
UDEV [1164.521255] remove /devices/parport0/ppdev0.0 (parport)
KERNEL[1168.910406] add /devices/parport0/ppdev0.0 (parport)
KERNEL[1168.910458] bind /devices/parport0/ppdev0.0 (parport)
UDEV [1168.913998] add /devices/parport0/ppdev0.0 (parport)
UDEV [1168.915360] bind /devices/parport0/ppdev0.0 (parport)
KERNEL[1168.956354] unbind /devices/parport0/ppdev0.0 (parport)
KERNEL[1168.957455] remove /devices/parport0/ppdev0.0 (parport)
UDEV [1168.961207] unbind /devices/parport0/ppdev0.0 (parport)
UDEV [1168.962744] remove /devices/parport0/ppdev0.0 (parport)

-------------------- dmesg --------------------------------

[ 1163.335657] usb 2-1: new full-speed USB device number 4 using uhci_hcd
[ 1163.523543] usb 2-1: New USB device found, idVendor=1753, idProduct=c902
[ 1163.523548] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1163.523552] usb 2-1: Product: PPC920 Pinpad Terminal
[ 1163.523556] usb 2-1: Manufacturer: GERTEC
[ 1163.526705] cdc_acm 2-1:1.0: ttyACM0: USB ACM device


Anyone with any suggestions?
Thank you!

Are these the USB 3 .0 ports?
This suggests a problem with your USB kernel modules. Are you using the generic kernel with an initrd?

1 members found this post helpful.

Dear

Solution to the problem is to just recompile the kernel by unchecking the CONFIG_USB_OTG option.

The .config file in the default Slackware build looks like this:
CONFIG_USB_OTG = y

The .config file in the build looks like this:
# CONFIG_USB_OTG is not set

Questions to recompile the kernel use the link:
https://edersoncorbari.github.io/tut...-build-kernel/

No need to recompile modules!

After compiling the kernel update the files:
vmlinuz-huge-smp-4.4.14-smp
System.map-huge-smp-4.4.14-smp
config-huge-smp-4.4.14-smp

And rewrite lilo again.

1 members found this post helpful.

If it included the pound/hash symbol (#) in front of it, then making that change does nothing. Those are used to "comment out" lines in kernel configs (along with many other configs and some scripting languages).

Anything in your kernel config that has a # in front of it won't be considered when compiling the kernel.

I'm not sure if you put it there as a copy/paste (which means recompiling won't change anything) or to indicate something else and in reality, they do not exist in the configs (in which case, recompiling would remove that feature). If you're curious, you can designate text as "code" using [code][/code] tags.

This can be used to make it easy to differentiate between output from a console/file/command vs just text that's being typed.

1 members found this post helpful.