1
\$\begingroup\$

Just finished installing arduino for the first time. I got a prompt about adding a user to a certain group. I accepted and continued. I tried to get the 'Blink' program to work. But everytime I try to upload, I get the following error;

avrdude: ser_open(): can't open device "/dev/ttyACM0": Input/output error ioctl("TIOCMGET"): Invalid argument

I started arduino as root. I know this isn't suggested. But it was the only way I could get the "SERIAL PORT" to be ungreyed. After trying to upload code and getting that error. The serial port option becomes greyed out again.

  • Did I install arduino incorrectly?
  • How can I correct the mentioned error?
  • What can I do to keep the serial port from being greyed out?
\$\endgroup\$
2
  • \$\begingroup\$ What is the output to the following commands: ls -l /dev/ttyACM0 and id? \$\endgroup\$
    – jippie
    Oct 13, 2012 at 8:59
  • \$\begingroup\$ Also add the output to dmesg | grep -iC5 ttyACM. \$\endgroup\$
    – jippie
    Oct 13, 2012 at 9:58

2 Answers 2

Reset to default
2
\$\begingroup\$

This simple fix worked for me

sudo ln /dev/ttyACM0 /dev/ttySACM0

Apparently Ubuntu wants ttyS* for the usb port; it's a bit flakey about it so the ttyACM shows up then it disappears.

\$\endgroup\$
1
\$\begingroup\$

If your problem wasn't solved with this command:

$ sudo ln /dev/ttyACM0 /dev/ttySACM0

maybe the usb port you are using is USB 3.0, then try plugging in a USB 2.0

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.