Re: Linux Kernel Issue in cdc_acm V5.15.x -- /dev/ttyACM0 Does Not Work

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On 25.08.22 18:42, Noel wrote:

> 
>       Modem issue ... will re-try: [Errno 16] could not open port
> /dev/ttyACM0: [Errno 16] Device or resource busy: '/dev/ttyACM0'
>       Modem issue ... will re-try: [Errno 16] could not open port
> /dev/ttyACM0: [Errno 16] Device or resource busy: '/dev/ttyACM0'
>       Modem issue ... will re-try: [Errno 16] could not open port
> /dev/ttyACM0: [Errno 16] Device or resource busy: '/dev/ttyACM0'
>         ... eventually gives up trying

Hi,

-EBUSY is odd, because CDC-ACM does not return -EBUSY. This
seems to come from the TTY layer. But just to make sure,
what does lusb say about your device?

	Regards
		Oliver




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