ubuntu 16.04 the selected serial port does not exist or your board is not conn

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i working fine on arduino mega 2560 board. don't know has changed , can't upload program it!!. tried mega board on same laptop , gave same error!. think it's ide don't know happened. here error message :



the selected serial port
 does not exist or board not connected

avrdude: version 6.3, compiled on dec 16 2016 @ 07:33:21
         copyright (c) 2000-2005 brian dean, http://www.bdmicro.com/
         copyright (c) 2007-2014 joerg wunsch

         system wide configuration file "/home/naji/arduino-1.8.0/hardware/tools/avr/etc/avrdude.conf"
         user configuration file "/home/naji/.avrduderc"
         user configuration file not exist or not regular file, skipping

         using port                    : /dev/ttyacm1
         using programmer              : wiring
         overriding baud rate          : 115200
avrdude: ser_open(): can't open device "/dev/ttyacm1": no such file or directory
ioctl("tiocmget"): inappropriate ioctl device
ioctl("tiocmget"): inappropriate ioctl device
avrdude: ser_send(): write error: bad file descriptor
avrdude: stk500_send(): failed send command serial port
avrdude: stk500v2_receivemessage(): timeout
avrdude: ser_send(): write error: bad file descriptor
avrdude: stk500_send(): failed send command serial port
avrdude: stk500v2_receivemessage(): timeout
avrdude: ser_send(): write error: bad file descriptor
avrdude: stk500_send(): failed send command serial port
avrdude: stk500v2_receivemessage(): timeout
avrdude: ser_send(): write error: bad file descriptor
avrdude: stk500_send(): failed send command serial port
avrdude: stk500v2_receivemessage(): timeout
avrdude: ser_send(): write error: bad file descriptor
avrdude: stk500_send(): failed send command serial port
avrdude: stk500v2_receivemessage(): timeout
avrdude: ser_send(): write error: bad file descriptor
avrdude: stk500_send(): failed send command serial port
avrdude: stk500v2_receivemessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating programmer

avrdude done.  thank you.

the selected serial port
 does not exist or board not connected

sudo chmod a+rw /dev/ttyacm1


Arduino Forum > Using Arduino > Installation & Troubleshooting > ubuntu 16.04 the selected serial port does not exist or your board is not conn


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