Log of udev event, when the bug happens. # udevadm monitor | grep -v power_supply monitor will print the received events for: UDEV - the event which udev sends out after rule processing KERNEL - the kernel uevent KERNEL[257777.226057] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/bsg/4:0:0:0 (bsg) KERNEL[257777.232094] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/scsi_generic/sg2 (scsi_generic) UDEV [257777.232131] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/scsi_generic/sg2 (scsi_generic) KERNEL[257777.232148] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/scsi_device/4:0:0:0 (scsi_device) UDEV [257777.232163] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/scsi_disk/4:0:0:0 (scsi_disk) KERNEL[257777.232176] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/scsi_disk/4:0:0:0 (scsi_disk) UDEV [257777.234471] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/scsi_device/4:0:0:0 (scsi_device) UDEV [257777.237032] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/bsg/4:0:0:0 (bsg) KERNEL[257785.993301] remove /devices/virtual/bdi/8:32 (bdi) KERNEL[257785.994189] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/block/sdc (block) UDEV [257785.994536] remove /devices/virtual/bdi/8:32 (bdi) UDEV [257785.996938] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0/block/sdc (block) KERNEL[257786.236165] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0 (scsi) KERNEL[257786.236196] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0 (scsi) UDEV [257786.238169] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0 (scsi) UDEV [257786.239825] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0/4:0:0:0 (scsi) KERNEL[257786.268117] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0 (scsi) KERNEL[257786.268147] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/scsi_host/host4 (scsi_host) KERNEL[257786.268166] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4 (scsi) KERNEL[257786.269320] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0 (usb) KERNEL[257786.269363] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0 (usb) KERNEL[257786.269829] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2 (usb) KERNEL[257786.269869] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2 (usb) UDEV [257786.270012] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/target4:0:0 (scsi) UDEV [257786.270648] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4/scsi_host/host4 (scsi_host) UDEV [257786.271546] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host4 (scsi) UDEV [257786.272602] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0 (usb) UDEV [257786.273926] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0 (usb) UDEV [257786.275670] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2 (usb) UDEV [257786.284734] remove /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2 (usb) KERNEL[257790.500838] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2 (usb) KERNEL[257790.501540] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0 (usb) KERNEL[257790.503117] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5 (scsi) KERNEL[257790.503138] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/scsi_host/host5 (scsi_host) KERNEL[257790.503198] bind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0 (usb) KERNEL[257790.503243] bind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2 (usb) KERNEL[257790.504419] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0 (scsi) KERNEL[257790.504445] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0 (scsi) KERNEL[257790.504458] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/scsi_disk/5:0:0:0 (scsi_disk) KERNEL[257790.504477] bind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0 (scsi) KERNEL[257790.504488] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/scsi_device/5:0:0:0 (scsi_device) KERNEL[257790.504601] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/scsi_generic/sg2 (scsi_generic) KERNEL[257790.504671] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/bsg/5:0:0:0 (bsg) KERNEL[257790.505897] add /devices/virtual/bdi/8:48 (bdi) KERNEL[257790.507578] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd (block) KERNEL[257790.507617] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd/sdd1 (block) KERNEL[257790.507647] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd/sdd2 (block) KERNEL[257790.507675] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd/sdd3 (block) KERNEL[257790.507703] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd/sdd4 (block) UDEV [257790.509233] add /devices/virtual/bdi/8:48 (bdi) UDEV [257790.539678] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2 (usb) UDEV [257790.547145] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0 (usb) UDEV [257790.550121] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5 (scsi) UDEV [257790.552446] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/scsi_host/host5 (scsi_host) UDEV [257790.554832] bind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0 (usb) UDEV [257790.556713] bind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2 (usb) UDEV [257790.558272] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0 (scsi) UDEV [257790.559847] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0 (scsi) UDEV [257790.561493] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/scsi_disk/5:0:0:0 (scsi_disk) UDEV [257790.563388] bind /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0 (scsi) UDEV [257790.566755] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/scsi_generic/sg2 (scsi_generic) UDEV [257790.567028] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/bsg/5:0:0:0 (bsg) UDEV [257790.568788] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/scsi_device/5:0:0:0 (scsi_device) UDEV [257790.592357] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd (block) UDEV [257790.618648] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd/sdd2 (block) UDEV [257790.618797] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd/sdd1 (block) UDEV [257790.621488] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd/sdd4 (block) UDEV [257790.624861] add /devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4.4/2-4.4.4/2-4.4.4.4/2-4.4.4.4.2/2-4.4.4.4.2:1.0/host5/target5:0:0/5:0:0:0/block/sdd/sdd3 (block)