Re: dmesg, serial port and permissions

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On Fri, Aug 16, 2024 at 3:54 AM Frederic Muller <fred@xxxxxxxx> wrote:
>
> A few questions all related: I fly FPV drones which require to use
> betaflight to configure them over the serial port. This has been working
> ok in the past and is getting more and more confusing. The timeline is
> far from accurate but in short:
>
> 1. Everything used to work fine a few Fedora releases ago (not so many)
>
> 2. dmesg now requires sudo

Yes, that change happened recently. Do something like
<https://unix.stackexchange.com/a/401626>.

> 3. Serial port also requires sudo ( /dev/ttyACM0 ) for betaflight to be
> able to access it

Add your user to dialout group. Something like:

    sudo usermod -a -G dialout fmuller

> 4. dmesg doesn't show the serial port connection happening anymore since
> about after Monday 12th and therefore I can't do anything anymore.

Sounds unusual.

> I´ve read that the serial port access problem could be due to group
> permissions so some guidance would help but in general I'd be happy to
> run both dmesg and the serial port from my user, and eventually
> understand why suddenly connecting the flight controller to the serial
> port (USB that is) doesn't seem to work anymore.

Jeff
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