Can't see OpenMV on Ubuntu despite doing adduser dialout

OpenMV Products
#1

I’ve done all the things listed in the Linux installation instructions, including sudo adduser dialout" but the OpenMV IDE still says “Error: Permission Denied” when I try to connect

The computer is a Chromebook Pixel running Ubuntu xenial (16)

When I do a dmesg it shows that the OpenMV has been assigned to ttyACM0 (see below). Is that what the IDE is looking for? If not, how do I tell it to do so?

[87804.052239] usb 1-1: new full-speed USB device number 48 using xhci_hcd
[87804.217727] usb 1-1: New USB device found, idVendor=1209, idProduct=abd1
[87804.217747] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[87804.217762] usb 1-1: Product: OpenMV Virtual Comm Port in FS Mode
[87804.217776] usb 1-1: Manufacturer: OpenMV
[87804.217785] usb 1-1: SerialNumber: 000000000011
[87804.219490] cdc_acm 1-1:1.0: This device cannot do calls on its own. It is not a modem.
[87804.219555] cdc_acm 1-1:1.0: ttyACM0: USB ACM device
[87804.220702] usb-storage 1-1:1.2: USB Mass Storage device detected

#2

Log out first. Log back in.

" sudo adduser dialout"

Requires re-longing in.

#3

If there’s more than one serial port, the IDE will ask you to choose. Did you log out after adding the user to group dialout ? if so, you could try this udev file, just copy it to /etc/udev/rules.d/ and make it executable

sudo chmod +x /etc/udev/rules.d/50-openmv.rules

then reboot or reload udev rules

sudo udevadm control --reload
#4

Thanks guys. I did all that, but no joy – still Permission Denied. So I dug around a bit, and it turns out that the command should actually be “sudo adduser serial” (not “dialout”). Now it works

I think something has changed in Debian/Ubuntu, or perhaps that particular port is part of the serial group, not the dialout group. At any rate, might be something worth noting in the docs…

#5

Different distros setup the group stuff differently, so the real answer is to look at the /dev/ttyACM0 file and see which group it belongs to and whether there are even group write permissions.