On Mon, Jun 9, 2014 at 5:35 PM, Tony Luck <[email protected]> wrote: > On Mon, Jun 9, 2014 at 3:25 PM, Tony Luck <[email protected]> wrote: >> Linus' tree (HEAD=963649d735c8) is spitting out all sorts of garbage >> on the serial console - as if the baud rate is being periodically set >> to something weird, and then back to 112500. I see over a dozen >> blocks of junk interspersed with good output. > > Ah - it seems that I need to be more specific on the cmdline > > console=uart8250,io,0x3f8,115200 > > makes all the garbage disappear. > > Do I need to update: Documentation/ia64/serial.txt > which has the example of "console=uart,io,0x3f8"?
It should do auto detect of the baud-rate if it is not specified which for 8250 is just reading the baud-rate divider and calculating the baud-rate using the uart clock. It should just reprogram the divider with the same divider value. I don't see anything obvious why this would have broken. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
