document the supported baud rates beyond 38400

* doc/coreutils.texi (Special):  Document the supported baud rates
beyond 38400.

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index f60f9c7..cf46c74 100644 (file)
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -12350,13 +12350,29 @@ Print the terminal speed.
 
 @item @var{n}
 @cindex baud rate, setting
-@c FIXME: Is this still true that the baud rate can't be set
-@c higher than 38400?
-Set the input and output speeds to @var{n}.  @var{n} can be one
-of: 0 50 75 110 134 134.5 150 200 300 600 1200 1800 2400 4800 9600
-19200 38400 @code{exta} @code{extb}.  @code{exta} is the same as
-19200; @code{extb} is the same as 38400.  0 hangs up the line if
-@option{-clocal} is set.
+Set the input and output speeds to @var{n}.  @var{n} can be one of: 0
+50 75 110 134 134.5 150 200 300 600 1200 1800 2400 4800 9600 19200
+38400 @code{exta} @code{extb}.  @code{exta} is the same as 19200;
+@code{extb} is the same as 38400.  Many systems, including GNU/Linux,
+support higher speeds.  The @command{stty} command includes support
+for speeds of
+57600,
+115200,
+230400,
+460800,
+500000,
+576000,
+921600,
+1000000,
+1152000,
+1500000,
+2000000,
+2500000,
+3000000,
+3500000,
+or
+4000000 where the system supports these.
+0 hangs up the line if @option{-clocal} is set.
 @end table