I am using a following command : BAUDRATE=8000000 stty -F /dev/ttyS6 ispeed $BAUDRATE ospeed $BAUDRATE -ignpar cs8 -cstopb –echo However it does not allow me to set anything above 4Mbd or at least it is not shown with a following command: $ sudo stty -a -F /dev/ttyS6 [sudo] password for ran: -bash: c$: command not found speed 4000000 baud; rows 0; columns 0; line = 0; ran@rg-debian-09:~/src$ [sudo] password for ran: intr = <undef>; quit = <undef>; erase = <undef>; kill = <undef>; eof = <undef>; -bash: [sudo]: command not found eol = <undef>; eol2 = <undef>; swtch = <undef>; start = <undef>; stop = <undef>; susp = <undef>; rprnt = <undef>; werase = <undef>; lnext = <undef> As you can see a speed is a last one from a settings before. Why? My system: RS232 card: Jetway ADMPEOX4CA Linux kernel : 3.2.53-rgm-rt75-nodebug #2 SMP PREEMPT RT By Richard -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
