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QUESTION: Any pointers as to why the Serial Port is grayed out on 64-bit Centos 6? In the next post, is my detailed installation log (with errors) - but here is a quick summary: I determined that I'm on 64-bit X86 Centos 6. I checked to see if the libusb drivers are installed. I checked to see what version of Java is installed. I checked to see how Java is configured. I downloaded the Energia Linux binary tarball (energia-0101E0009-linux.tgz) I untarred the Energia tarball to create an energia-0101E0009 directory. I ran the energia application. I set the board to msp430g2553 (16MHz) I failed at selecting the serial port because the selection was grayed out. I ran the default "Blink" procedure, which caused the board LEDs to blink. I modified the "Blink" procedure, and tested that it was working. I tried to open the Energia Serial Monitor - but failed. Googling for how to solve this problem, I added a udev file & rebooted. Googling further, I added user1 to the various groups and rebooted. Googling further, I obtained and compiled librxtx-master. I installed the EPEL rxtx using "sudo yum install rxtx". Yet, the serial port is still grayed out! Q: How do I diagnose WHY the MSP430 serial port is grayed out? Note: Searching this forum came up with this - but it doesn't seem to apply as it's on Windows: - serial port grayed out in IDE ver E0009