Linux – How to stop automatic Linux device initialization

How to stop automatic Linux device initialization… here is a solution to the problem.

How to stop automatic Linux device initialization

Whenever I plug a USB mass storage device into the system, I get uevents like these from the kernel. (as shown in udevadm monitor).

KERNEL[104397.739313] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6 (usb)
KERNEL[104397.740141] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0 (usb)
KERNEL[104397.740787] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48 (scsi)
KERNEL[104397.741362] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/scsi_host/host48 (scsi_host)
KERNEL[104399.210661] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/target48:0:0 (scsi)
KERNEL[104399.211095] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/target48:0:0/48:0:0:0 (scsi)
KERNEL[104399.211502] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/target48:0:0/48:0:0:0/scsi_disk/48:0:0:0 (scsi_disk)
KERNEL[104399.211757] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/target48:0:0/48:0:0:0/scsi_device/48:0:0:0 (scsi_device)
KERNEL[104399.212464] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/target48:0:0/48:0:0:0/scsi_generic/sg1 (scsi_generic)
KERNEL[104399.212743] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/target48:0:0/48:0:0:0/bsg/48:0:0:0 (bsg)
KERNEL[104399.215444] add      /devices/virtual/bdi/8:16 (bdi)
KERNEL[104399.220099] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/target48:0:0/48:0:0:0/block/sdb (block)
KERNEL[104399.220181] add      /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/host48/target48:0:0/48:0:0:0/block/sdb/sdb1 (block)

I need to connect a USB device to KVM as soon as possible, and while udev rules allow me to invoke a script that executes the connection, kernel processing still happens automatically. I want to prevent this from happening. Can this be achieved through udev or other mechanisms?


Actually I remember

this is much simpler than I remember in the new kernel, you just run :

echo '0' > /sys/bus/usb/drivers_autoprobe

Run as root at startup, which prevents the kernel from probing USB devices when they are connected, so they will only be enumerated if you manually choose to drivers_probe them by writing something to /sys/bus/usb/

This should more or less accomplish what you want, the kernel doesn’t bind any drivers to USB devices, you are free to bind them to your VM later.

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