You are right that the device recreates itself every time it is plugged in and the chmod is not persistent. However, I am a member of the dialout group, and that does not give me the required permission to access the /dev/ttyUSB0 device. I don't know why. So far, only the chmod "trick" if you will works, and it is not difficult.

On Mon, Jun 8, 2020 at 12:59 AM W Paul Mills <ac0hy@wpmills.com> wrote:
While this will work, it is not really the right way to do it. It is
also temporary. These devices recreate themselves every boot, or every
time you reinsert a device.


The right way is "sudo adduser user dialout" Substitue your user name
for "user." On some systems the group may be different.

Example:


wpmills@suzanne1:~$ ls -l /dev/ttyUSB*
crw-rw----+ 1 root dialout 188, 0 Jun  7 18:53 /dev/ttyUSB0
crw-rw----+ 1 root dialout 188, 1 Jun  8 02:49 /dev/ttyUSB1
wpmills@suzanne1:~$

wpmills@suzanne1:~$ sudo adduser wpmills dialout
[sudo] password for wpmills:
The user `wpmills' is already a member of `dialout'.
wpmills@suzanne1:~$



On 6/7/20 7:14 PM, Peter via chirp_users wrote:
> Hi all:
>
> I am not sure who came up with the brilliant tip of chmod 777
> /dev/ttyUSB0 as I have deleted the email suggesting that.
>
> So THANK YOU for that suggestion. I was getting frustrated trying to get
> Chirp on Linux Mint 19.2 to up/download from my new (to me) Icom 2100H.
> All I got was error messages that the radio had responded
> inappropriately. Until I did the chmod thing. IT WORKED.
>
> So, thanks again. Now I can get going on the next step of a very long march.
>
> Peter, VE3BBN
>

--
/**************************************************
* Amateur Radio Station AC0HY                     *
* W. Paul Mills         SN807                     *
* Assistant EC Alpha-1 ARES Shawnee/Wabaunsee, KS *
* President Kaw Valley Amateur Radio Club         *
**************************************************/

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