Hi Thomas. do you have brltty configured to use /dev/ttyS3? The default is /dev/ttyS0. In the ./configure, you would do ./configure --with-braille-device=/dev/ttyS3 Also, depending on how these serial ports are set up, do you have any possibility of something on another serial port that is competing for the use of /dev/ttys3? Kind of unusual that you are using the fourth serial port, but that should still work. By the way, there's no problem using speakup and brltty together, with different serial ports and different synth/display equipment. Cheryl _______________________________________________ Blinux-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/blinux-list