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I'm working on USB the code which i'm using usb cdc serial is not running on the PC which i'm using is ubuntu 14.04.In other PC's the code is running fine.I changed the compiler and test with all backup codes.Still it's not working . `

  1. The CDCDSerialDriver_GetControlLineState () is always Zero in the pc which i'm using. There Serial port is not getting ON

Why it is happening?

  • Check whether there are not conflicting drivers with cdc driver. If yes, blacklist them. – kukulo Aug 24 '18 at 10:52
  • How to check that? – crackhead.h Aug 24 '18 at 10:53
  • run lsmod command on both machines and compare the output. – kukulo Aug 24 '18 at 11:50
  • Can u give an explanation for this, How to do? – crackhead.h Aug 24 '18 at 11:53
  • open terminal application and type lsmod and hit enter. – kukulo Aug 24 '18 at 12:06

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