Steve Cohen
Steve Cohen replied to the topic 'Errors due to port instability' in the forum. 1 week ago

Thanks, Mattia.

This issue has come back to rear its ugly head again.

I had gotten disgusted with my GPS dongle and have removed it from the system. Only to find that /dev/ttyUSB0 still disappears from the /dev/ directory listing only to find /dev/ttyUSB1 appearing in its place, even without the dongle.

I am attaching a file containing dmesg output. Perhaps it will suggest something,

I would call your attention to lines 567-580, Maybe you can help me understand what they mean.

[Thu Apr 25 21:02:33 2024] pl2303 ttyUSB0: usb_serial_generic_write_bulk_callback - nonzero urb status: -71
[Thu Apr 25 21:02:33 2024] usb 3-2: USB disconnect, device number 2
[Thu Apr 25 21:02:33 2024] usb 1-2: USB disconnect, device number 3
[Thu Apr 25 21:02:33 2024] pl2303 ttyUSB0: pl2303_read_int_callback - usb_submit_urb failed with result -19
[Thu Apr 25 21:02:33 2024] pl2303 ttyUSB0: error sending break = -19
[Thu Apr 25 21:02:33 2024] pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0
[Thu Apr 25 21:02:33 2024] pl2303 1-2:1.0: device disconnected
[Thu Apr 25 21:02:33 2024] usb 1-2: new full-speed USB device number 5 using xhci-hcd
[Thu Apr 25 21:02:34 2024] usb 1-2: New USB device found, idVendor=067b, idProduct=2303, bcdDevice= 4.00
[Thu Apr 25 21:02:34 2024] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[Thu Apr 25 21:02:34 2024] usb 1-2: Product: USB-Serial Controller D
[Thu Apr 25 21:02:34 2024] usb 1-2: Manufacturer: Prolific Technology Inc. 
[Thu Apr 25 21:02:34 2024] pl2303 1-2:1.0: pl2303 converter detected
[Thu Apr 25 21:02:34 2024] usb 1-2: pl2303 converter now attached to ttyUSB1

I also found issues with my camera and focuser, which I documented in another post under EKos as I did not originally think they were related to this, but maybe they are.

File Attachment:

File Name: dmesg.log
File Size: 48 KB


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