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[259892.454355] 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[259892.454422] 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[259892.454441] 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) KERNEL[259892.454539] 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 [259892.457118] 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) UDEV [259892.458521] 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 [259892.458829] 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 [259892.460499] 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) KERNEL[259900.048051] remove /devices/virtual/bdi/8:32 (bdi) KERNEL[259900.048161] 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 [259900.049035] remove /devices/virtual/bdi/8:32 (bdi) UDEV [259900.050572] 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[259900.304129] 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[259900.304164] 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 [259900.307449] 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 [259900.308340] 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[259900.328191] 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[259900.328218] 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[259900.328236] 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 [259900.329867] 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 [259900.330569] 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 [259900.332031] 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[259900.347337] 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 [259900.349761] 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[259900.468456] 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[259900.468492] 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[259900.468523] 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[259900.469340] 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[259900.469396] 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[259900.469435] 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[259900.469457] 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[259900.469473] 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[259900.469585] 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[259900.469608] 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[259900.470410] add /devices/virtual/bdi/8:48 (bdi) UDEV [259900.470903] 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 [259900.471780] add /devices/virtual/bdi/8:48 (bdi) KERNEL[259900.472647] 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[259900.472679] 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[259900.472703] 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[259900.472733] 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) UDEV [259900.472791] 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 [259900.475188] 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 [259900.477597] 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 [259900.479619] 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 [259900.482015] 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 [259900.484192] 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 [259900.486796] 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 [259900.486929] 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 [259900.487243] 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 [259900.516822] 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 [259900.541388] 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 [259900.541517] 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) UDEV [259900.546077] 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)