It's really annoying, I always turn off the serial port when I do not need it to avoid that popup during booting.
The serial port is required for the software to run, so disabling it is not an option.
Just noticed this old post. Not sure what version of WS or Fusion you're using, but try setting the following in your .vmx file,
answer.msg.serial.file.open = "Append"
Hope that helps.
Try to doing that...
serial1.present = "TRUE"
serial1.fileType = "pipe"
serial1.yieldOnMsrRead = "TRUE"
serial1.startConnected = "TRUE"
serial1.fileName = "/tmp/dev_com"
serial1.pipe.endPoint = "client"
On the target machine I added the following lines to the .vmx file.
serial0.present = "TRUE"
serial0.fileType = "pipe"
serial0.yieldOnMsrRead = "TRUE"
serial0.startConnected = "TRUE"
serial0.fileName = "/tmp/dev_com"
Then started up the target vm, edited the boot.ini file to add "/debugport=COM1 /baudrate=115200".
Now start up the windbg vm, launch WinDbg, then File | Kernel Debug. Selection serial, COM2, check the box for reconnect.
@abirhasan If you read blackpuma's OP it explicitly states "I added a new serial device and it works fine." so presenting the configuration information you have has absolutely nothing whatsoever to do with the issue, which is having to answer a message box that appears when starting/restarting the Virtual Machine to which jessepool had already provided the correct answer to!