Arch Linux

jscbar

Member

Registered: 2021-07-26

Posts: 1

Unbound USB port keeps re-binding

So, I do automatically unbind one USB port that has a USB flash media attached to it,
which doesn't have decent power management features and so tends to get very hot because of its metallic shell,
even unmounted and un-used, just attached.

The problem is it keeps re-binding seemingly at random intervals, I have not found a reason for this.
When it gets rebound, udevadm monitoring gives the following output:

KERNEL[858173.456165] remove   /devices/pci0000:00/0000:00:15.0/usb2/2-3 (usb)
UDEV  [858173.458616] remove   /devices/pci0000:00/0000:00:15.0/usb2/2-3 (usb)
KERNEL[858174.469946] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3 (usb)
KERNEL[858174.473192] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0 (usb)
KERNEL[858174.473518] add      /devices/virtual/workqueue/scsi_tmf_2 (workqueue)
KERNEL[858174.476682] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2 (scsi)
UDEV  [858174.476826] add      /devices/virtual/workqueue/scsi_tmf_2 (workqueue)
KERNEL[858174.476898] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/scsi_host/host2 (scsi_host)
KERNEL[858174.476985] bind     /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0 (usb)
KERNEL[858174.477082] bind     /devices/pci0000:00/0000:00:15.0/usb2/2-3 (usb)
UDEV  [858174.505110] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3 (usb)
UDEV  [858174.507767] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0 (usb)
UDEV  [858174.508464] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2 (scsi)
UDEV  [858174.509200] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/scsi_host/host2 (scsi_host)
UDEV  [858174.510412] bind     /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0 (usb)
UDEV  [858174.518522] bind     /devices/pci0000:00/0000:00:15.0/usb2/2-3 (usb)
KERNEL[858175.495968] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0 (scsi)
KERNEL[858175.496087] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0 (scsi)
KERNEL[858175.496151] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/scsi_device/2:0:0:0 (scsi_device)
KERNEL[858175.497654] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/bsg/2:0:0:0 (bsg)
KERNEL[858175.497720] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/scsi_disk/2:0:0:0 (scsi_disk)
UDEV  [858175.498341] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0 (scsi)
KERNEL[858175.499516] add      /devices/virtual/bdi/8:0 (bdi)
UDEV  [858175.500141] add      /devices/virtual/bdi/8:0 (bdi)
UDEV  [858175.501971] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0 (scsi)
UDEV  [858175.503161] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/scsi_device/2:0:0:0 (scsi_device)
UDEV  [858175.504057] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/bsg/2:0:0:0 (bsg)
UDEV  [858175.505433] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/scsi_disk/2:0:0:0 (scsi_disk)
KERNEL[858175.519427] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/block/sda (block)
KERNEL[858175.519486] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/block/sda/sda1 (block)
KERNEL[858175.519527] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/block/sda/sda2 (block)
KERNEL[858175.519576] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/block/sda/sda3 (block)
KERNEL[858175.521437] bind     /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0 (scsi)
UDEV  [858175.610115] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/block/sda (block)
UDEV  [858175.763166] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/block/sda/sda2 (block)
UDEV  [858175.792920] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/block/sda/sda3 (block)
UDEV  [858175.801371] add      /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0/block/sda/sda1 (block)
UDEV  [858175.802570] bind     /devices/pci0000:00/0000:00:15.0/usb2/2-3/2-3:1.0/host2/target2:0:0/2:0:0:0 (scsi)

Last edited by jscbar (2022-01-19 07:08:00)