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made the question more readable
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edit approved Nov 2, 2021 at 14:27
Bravo
edit approved Nov 2, 2021 at 14:27
Bravo
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crw-rw---T 1 root dialout 166, 0 Oct 15 21:51 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 15 21:50 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 15 21:50 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 15 21:50 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 15 21:50 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 15 21:50 /dev/ttyACM5

crw-rw---T 1 root dialout 166, 0 Oct 15 21:51 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 15 21:50 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 15 21:50 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 15 21:50 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 15 21:50 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 15 21:50 /dev/ttyACM5

-rw-r--r-- 1 root root 8 Oct 31 17:17 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 31 16:18 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 31 16:18 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 31 17:17 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 31 16:18 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 31 16:18 /dev/ttyACM5 crw-rw---T 1 root dialout 166, 6 Oct 31 16:18 /dev/ttyACM6

-rw-r--r-- 1 root root 8 Oct 31 17:17 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 31 16:18 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 31 16:18 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 31 17:17 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 31 16:18 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 31 16:18 /dev/ttyACM5 crw-rw---T 1 root dialout 166, 6 Oct 31 16:18 /dev/ttyACM6

crw-rw---T 1 root dialout 166, 0 Oct 15 21:51 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 15 21:50 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 15 21:50 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 15 21:50 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 15 21:50 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 15 21:50 /dev/ttyACM5

-rw-r--r-- 1 root root 8 Oct 31 17:17 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 31 16:18 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 31 16:18 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 31 17:17 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 31 16:18 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 31 16:18 /dev/ttyACM5 crw-rw---T 1 root dialout 166, 6 Oct 31 16:18 /dev/ttyACM6

crw-rw---T 1 root dialout 166, 0 Oct 15 21:51 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 15 21:50 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 15 21:50 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 15 21:50 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 15 21:50 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 15 21:50 /dev/ttyACM5 
-rw-r--r-- 1 root root 8 Oct 31 17:17 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 31 16:18 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 31 16:18 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 31 17:17 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 31 16:18 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 31 16:18 /dev/ttyACM5 crw-rw---T 1 root dialout 166, 6 Oct 31 16:18 /dev/ttyACM6
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NewtownGuy
NewtownGuy
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Why does usb enumeration create a bogus device in /dev and how do I get rid of it?

I have a USB modem that sometimes enumerates wrong and creates a false device in /dev. How do I remove that bogus device ? How do I force renumeration without rebooting ?

When the modem works correctly, it produces this:

crw-rw---T 1 root dialout 166, 0 Oct 15 21:51 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 15 21:50 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 15 21:50 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 15 21:50 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 15 21:50 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 15 21:50 /dev/ttyACM5

When there's a problem, it produces this (note the curious first line):

-rw-r--r-- 1 root root 8 Oct 31 17:17 /dev/ttyACM0 crw-rw---T 1 root dialout 166, 1 Oct 31 16:18 /dev/ttyACM1 crw-rw---T 1 root dialout 166, 2 Oct 31 16:18 /dev/ttyACM2 crw-rw---T 1 root dialout 166, 3 Oct 31 17:17 /dev/ttyACM3 crw-rw---T 1 root dialout 166, 4 Oct 31 16:18 /dev/ttyACM4 crw-rw---T 1 root dialout 166, 5 Oct 31 16:18 /dev/ttyACM5 crw-rw---T 1 root dialout 166, 6 Oct 31 16:18 /dev/ttyACM6

How do I fix this ?