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A loop device is a particular type of block device, managed by the loop device driver. A loop device is a block device whose content is stored in a file, similar to the way a SCSI disk device is a block device whose content is stored on a SCSI disk, a USB storage device is a block device whose content is stored on a USB storage peripheral, etc. Linux has a ...


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You might be able to re-detect it without reboot, by unloading / re-loading the correct module (or just un-binding and re-binding the driver). For example: [ 978.527221] sd 11:0:0:1: [sdk] Attached SCSI removable disk #~> echo 11:0:0:1 > /sys/bus/scsi/drivers/sd/unbind #~> echo 11:0:0:1 > /sys/bus/scsi/drivers/sd/bind [ 5572.027119] sd ...


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Argh and grumble. I should have paid better attention to the output of dmesg | grep ftdi. There was ftdi stuff in there, but I didn't recognize any of it. In particular one brltty was showing up. I should have googled it. At which point I would have discovered this is the "Braille Display" thing. So apparently, default out of the box sets up some braille ...


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You'll probably want to write a rule for udev. Assuming no changes to udev.conf, your rules file should be placed into /etc/udev/rules.d/; it may help you to crib from packages' rules which may be found in /lib/udev/rules.d/. Writing good rules is a bit of an acquired art, but you could start with something simple if you have no other ttyACM* devices: # ...



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