I'm using kernel 5.15.0-051500rc5-lowlatency from https://kernel.ubuntu.com/~kernel-ppa/mainline. I guess I could try the official standard kernel as well. udevadm monitor reports this on insertion of a USB pen drive: KERNEL[34211.745784] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3 (usb) KERNEL[34211.766347] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0 (usb) KERNEL[34211.766487] add /devices/virtual/workqueue/scsi_tmf_15 (workqueue) KERNEL[34211.766582] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15 (scsi) KERNEL[34211.766596] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/scsi_host/host15 (scsi_host) KERNEL[34211.766623] bind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0 (usb) KERNEL[34211.766651] bind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3 (usb) UDEV [34211.768695] add /devices/virtual/workqueue/scsi_tmf_15 (workqueue) UDEV [34211.782340] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3 (usb) UDEV [34211.786977] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0 (usb) UDEV [34211.787738] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15 (scsi) UDEV [34211.788758] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/scsi_host/host15 (scsi_host) UDEV [34211.789765] bind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0 (usb) UDEV [34211.792650] bind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3 (usb) KERNEL[34212.770824] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0 (scsi) KERNEL[34212.770866] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0 (scsi) KERNEL[34212.770889] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_device/15:0:0:0 (scsi_device) KERNEL[34212.770943] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_generic/sg11 (scsi_generic) KERNEL[34212.770964] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_disk/15:0:0:0 (scsi_disk) KERNEL[34212.771058] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/bsg/15:0:0:0 (bsg) UDEV [34212.772488] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0 (scsi) UDEV [34212.773741] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0 (scsi) UDEV [34212.774701] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_device/15:0:0:0 (scsi_device) UDEV [34212.775890] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_generic/sg11 (scsi_generic) UDEV [34212.776260] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_disk/15:0:0:0 (scsi_disk) UDEV [34212.776657] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/bsg/15:0:0:0 (bsg) KERNEL[34212.781211] add /devices/virtual/bdi/8:160 (bdi) UDEV [34212.781712] add /devices/virtual/bdi/8:160 (bdi) KERNEL[34212.850686] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/block/sdk (block) KERNEL[34212.850733] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/block/sdk/sdk1 (block) KERNEL[34212.852993] bind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0 (scsi) UDEV [34212.887689] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/block/sdk (block) UDEV [34212.921072] add /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/block/sdk/sdk1 (block) UDEV [34212.922117] bind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0 (scsi) ... and this on removal: KERNEL[34235.065672] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/bsg/15:0:0:0 (bsg) KERNEL[34235.065742] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_generic/sg11 (scsi_generic) KERNEL[34235.065759] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_device/15:0:0:0 (scsi_device) KERNEL[34235.065784] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_disk/15:0:0:0 (scsi_disk) KERNEL[34235.065875] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/block/sdk/sdk1 (block) KERNEL[34235.065942] remove /devices/virtual/bdi/8:160 (bdi) KERNEL[34235.066074] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/block/sdk (block) UDEV [34235.068631] remove /devices/virtual/bdi/8:160 (bdi) KERNEL[34235.077017] unbind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0 (scsi) KERNEL[34235.077055] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0 (scsi) KERNEL[34235.087524] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0 (scsi) KERNEL[34235.087544] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/scsi_host/host15 (scsi_host) KERNEL[34235.087559] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15 (scsi) KERNEL[34235.093084] remove /devices/virtual/workqueue/scsi_tmf_15 (workqueue) KERNEL[34235.093137] unbind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0 (usb) KERNEL[34235.093158] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0 (usb) UDEV [34235.094539] remove /devices/virtual/workqueue/scsi_tmf_15 (workqueue) KERNEL[34235.097101] unbind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3 (usb) KERNEL[34235.097137] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3 (usb) UDEV [34235.205820] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_device/15:0:0:0 (scsi_device) UDEV [34235.205883] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_generic/sg11 (scsi_generic) UDEV [34235.205908] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/bsg/15:0:0:0 (bsg) UDEV [34235.205928] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/scsi_disk/15:0:0:0 (scsi_disk) UDEV [34235.205946] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/scsi_host/host15 (scsi_host) UDEV [34235.206082] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/block/sdk/sdk1 (block) UDEV [34235.207722] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0/block/sdk (block) UDEV [34235.208668] unbind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0 (scsi) UDEV [34235.209325] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0/15:0:0:0 (scsi) UDEV [34235.209937] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15/target15:0:0 (scsi) UDEV [34235.210487] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0/host15 (scsi) UDEV [34235.211121] unbind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0 (usb) UDEV [34235.211603] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3/2-3:1.0 (usb) UDEV [34235.212312] unbind /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3 (usb) UDEV [34235.215889] remove /devices/pci0000:00/0000:00:01.3/0000:01:00.0/usb2/2-3 (usb)