Comment # 25 on bug 1007652 from Matthias Brugger

I observe this again with brltty-5.6-99.12

> udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[4621.088941] add      /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2
(usb)
KERNEL[4621.097121] add     
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
KERNEL[4621.097774] add     
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0 (usb-serial)
KERNEL[4621.099971] add     
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0/tty/ttyUSB0
(tty)
KERNEL[4621.100050] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0 (usb-serial)
KERNEL[4621.100126] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
KERNEL[4621.100187] bind     /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2
(usb)
UDEV  [4621.654409] add      /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2
(usb)
UDEV  [4621.659146] add     
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
UDEV  [4621.662476] add     
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0 (usb-serial)
UDEV  [4621.670044] add     
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0/tty/ttyUSB0
(tty)
UDEV  [4621.671403] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0 (usb-serial)
UDEV  [4621.672138] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
UDEV  [4621.673399] bind     /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2
(usb)
KERNEL[4622.826940] remove  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0/tty/ttyUSB0
(tty)
KERNEL[4622.827016] unbind  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0 (usb-serial)
KERNEL[4622.827053] remove  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0 (usb-serial)
KERNEL[4622.827107] unbind  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
KERNEL[4622.827175] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
UDEV  [4622.830975] remove  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0/tty/ttyUSB0
(tty)
UDEV  [4622.833293] unbind  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0 (usb-serial)
UDEV  [4622.835044] remove  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0 (usb-serial)
UDEV  [4622.836645] unbind  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
UDEV  [4622.839450] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
KERNEL[4625.870706] unbind  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
UDEV  [4625.874526] unbind  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
KERNEL[4626.006916] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
UDEV  [4626.011022] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
KERNEL[4627.876296] unbind  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
UDEV  [4627.880304] unbind  
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
KERNEL[4628.010895] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)
UDEV  [4628.014727] bind    
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0 (usb)

And so on until I unplug the device.