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[10316.148582] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/bsg/4:0:0:0 (bsg) KERNEL[10316.148718] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/scsi_generic/sg2 (scsi_generic) KERNEL[10316.148737] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/scsi_device/4:0:0:0 (scsi_device) KERNEL[10316.148810] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/scsi_disk/4:0:0:0 (scsi_disk) UDEV [10316.150795] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/scsi_generic/sg2 (scsi_generic) UDEV [10316.151259] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/bsg/4:0:0:0 (bsg) UDEV [10316.153358] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/scsi_disk/4:0:0:0 (scsi_disk) UDEV [10316.153443] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/scsi_device/4:0:0:0 (scsi_device) KERNEL[10325.527284] remove /devices/virtual/bdi/8:32 (bdi) KERNEL[10325.527425] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/block/sdc (block) UDEV [10325.528344] remove /devices/virtual/bdi/8:32 (bdi) UDEV [10325.529371] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0/block/sdc (block) KERNEL[10325.772119] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0 (scsi) KERNEL[10325.772152] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0 (scsi) UDEV [10325.774112] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0 (scsi) UDEV [10325.775045] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0/4:0:0:0 (scsi) KERNEL[10325.796104] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0 (scsi) KERNEL[10325.796133] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/scsi_host/host4 (scsi_host) KERNEL[10325.796152] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4 (scsi) KERNEL[10325.796751] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb) KERNEL[10325.796785] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb) KERNEL[10325.797247] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb) KERNEL[10325.797286] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb) UDEV [10325.797543] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/target4:0:0 (scsi) UDEV [10325.798531] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4/scsi_host/host4 (scsi_host) UDEV [10325.799470] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host4 (scsi) UDEV [10325.800764] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb) UDEV [10325.801790] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb) UDEV [10325.803192] unbind /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb) UDEV [10325.822894] remove /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb) KERNEL[10328.672752] add /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb) KERNEL[10328.674111] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb) KERNEL[10328.675645] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5 (scsi) KERNEL[10328.675684] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/scsi_host/host5 (scsi_host) KERNEL[10328.675725] bind /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb) KERNEL[10328.675770] bind /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb) KERNEL[10328.676723] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0 (scsi) KERNEL[10328.677293] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0 (scsi) KERNEL[10328.677315] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/scsi_disk/5:0:0:0 (scsi_disk) KERNEL[10328.677338] bind /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0 (scsi) KERNEL[10328.677357] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/scsi_device/5:0:0:0 (scsi_device) KERNEL[10328.677379] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/scsi_generic/sg2 (scsi_generic) KERNEL[10328.677400] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/bsg/5:0:0:0 (bsg) KERNEL[10328.677975] add /devices/virtual/bdi/8:48 (bdi) UDEV [10328.679302] add /devices/virtual/bdi/8:48 (bdi) UDEV [10328.702075] add /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb) KERNEL[10328.704247] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/block/sdd (block) UDEV [10328.704374] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb) UDEV [10328.705471] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5 (scsi) UDEV [10328.706544] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/scsi_host/host5 (scsi_host) UDEV [10328.708172] bind /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb) UDEV [10328.710027] bind /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb) UDEV [10328.713565] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0 (scsi) UDEV [10328.715480] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0 (scsi) UDEV [10328.717578] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/scsi_disk/5:0:0:0 (scsi_disk) UDEV [10328.719185] bind /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0 (scsi) UDEV [10328.721087] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/scsi_device/5:0:0:0 (scsi_device) UDEV [10328.721508] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/scsi_generic/sg2 (scsi_generic) UDEV [10328.722191] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/bsg/5:0:0:0 (bsg) UDEV [10328.840285] add /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/block/sdd (block)