Serial port /dev/ttyS0 not working on ubuntu (LSR safety check engaged)

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Serial ports(COM0 and COM1) are working in windows, but not on ubuntu (14.04)



$ dmesg | grep tty



gives LSR safety check engaged for /dev/ttyS0, I have also verified that I have permission to read and write the port, and that I am a part of the dialout group.



$ setserial -g /dev/ttyS0



It contains UART: 16550A, and it is not unknown/undefined.



NOTE: The serial ports on another identical motherboard are working fine with this hardisk (ubuntu 14.04). The problem is only with the former motherboard, that too only on ubuntu (works fine on windows). I have tried it various clients like cutecom, gtkterm, putty, simple cat and echo, but none of them seem to work. I have also checked the BIOS settings and all the serial ports are enabled.



Been stuck on this for many days. Any help will be really appreciated.










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    Serial ports(COM0 and COM1) are working in windows, but not on ubuntu (14.04)



    $ dmesg | grep tty



    gives LSR safety check engaged for /dev/ttyS0, I have also verified that I have permission to read and write the port, and that I am a part of the dialout group.



    $ setserial -g /dev/ttyS0



    It contains UART: 16550A, and it is not unknown/undefined.



    NOTE: The serial ports on another identical motherboard are working fine with this hardisk (ubuntu 14.04). The problem is only with the former motherboard, that too only on ubuntu (works fine on windows). I have tried it various clients like cutecom, gtkterm, putty, simple cat and echo, but none of them seem to work. I have also checked the BIOS settings and all the serial ports are enabled.



    Been stuck on this for many days. Any help will be really appreciated.










    share|improve this question























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Serial ports(COM0 and COM1) are working in windows, but not on ubuntu (14.04)



      $ dmesg | grep tty



      gives LSR safety check engaged for /dev/ttyS0, I have also verified that I have permission to read and write the port, and that I am a part of the dialout group.



      $ setserial -g /dev/ttyS0



      It contains UART: 16550A, and it is not unknown/undefined.



      NOTE: The serial ports on another identical motherboard are working fine with this hardisk (ubuntu 14.04). The problem is only with the former motherboard, that too only on ubuntu (works fine on windows). I have tried it various clients like cutecom, gtkterm, putty, simple cat and echo, but none of them seem to work. I have also checked the BIOS settings and all the serial ports are enabled.



      Been stuck on this for many days. Any help will be really appreciated.










      share|improve this question













      Serial ports(COM0 and COM1) are working in windows, but not on ubuntu (14.04)



      $ dmesg | grep tty



      gives LSR safety check engaged for /dev/ttyS0, I have also verified that I have permission to read and write the port, and that I am a part of the dialout group.



      $ setserial -g /dev/ttyS0



      It contains UART: 16550A, and it is not unknown/undefined.



      NOTE: The serial ports on another identical motherboard are working fine with this hardisk (ubuntu 14.04). The problem is only with the former motherboard, that too only on ubuntu (works fine on windows). I have tried it various clients like cutecom, gtkterm, putty, simple cat and echo, but none of them seem to work. I have also checked the BIOS settings and all the serial ports are enabled.



      Been stuck on this for many days. Any help will be really appreciated.







      14.04 windows bios serial-port putty






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      asked Mar 5 at 11:40









      Hari Prasad

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