/dev/ttyUSB0 problems in F26

asked 2017-10-02 22:15:43 -0500

jramoz15 gravatar image

I am connecting Rapsberry or Onion Omega2 into my USB ports but when I run screen /dev/ttyUSB0 I am not able to see ttyUSB0. Neither when I run lsusb nor lsmogd | grep serial I cannot find any device associated with the two I want to connect (in fact, the output is empty). If I run modinfo cp210x I found several lines of information which could tell me that I have serial drivers installed.

Looking in some forums I also found the script that shows you which devices are connected. https://unix.stackexchange.com/questi... . But again nothing showing neither my two devices.

I am using Fedora workstation 26 kernel 4.12.14-300.fc26.x86_64

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Hi, is there any difference if you run the commands as root? Also have you look at journalctl at the moment of plugin the device? Maybe it's been recognised as serial instead of USB. Cheers

casep gravatar imagecasep ( 2017-10-03 07:40:51 -0500 )edit

Please reboot Fedora the insert and remove the USB device then run dmesg | grep -iE 'HCI|usb' and post the output of that.

MettaCrawler gravatar imageMettaCrawler ( 2017-10-04 13:10:55 -0500 )edit

@casep, Actually I have been testing as root and I have the same results. thejournalctl does not tell me anything, just remains without change.

jramoz15 gravatar imagejramoz15 ( 2017-10-04 15:46:43 -0500 )edit

@MettaCrawler I have the output but is too long to post it here. This is a temp link https://www.dropbox.com/s/3p8sfrw720i... Let me know if you can access. Thanks for replying.

jramoz15 gravatar imagejramoz15 ( 2017-10-04 15:57:56 -0500 )edit

Hi @jramoz15 I fail to see anything that looks like a USB unknown device from dmesg. Odd. When I worked with Arduino (similar thing) I only needed to add my user to tty to have access to it. But in your case I don't see recognised it at all. Have you managed to access it in a different environment? (You can use Fedora Pastebin https://paste.fedoraproject.org/ )

casep gravatar imagecasep ( 2017-10-05 03:42:38 -0500 )edit