svn commit: r51493 - head/en_US.ISO8859-1/books/faq

[Eitan Adler]

Author: eadler
Date: Sat Mar 17 19:18:10 2018
New Revision: 51493
URL: https://svnweb.freebsd.org/changeset/doc/51493

Log:
  faq: update serial FAQ to include uart info
  
  Also use better source of information as the kernel buffer may not have
  the reference anymore.

Modified:
  head/en_US.ISO8859-1/books/faq/book.xml

Modified: head/en_US.ISO8859-1/books/faq/book.xml
==============================================================================
--- head/en_US.ISO8859-1/books/faq/book.xml	Sat Mar 17 18:38:10 2018	(r51492)
+++ head/en_US.ISO8859-1/books/faq/book.xml	Sat Mar 17 19:18:10 2018	(r51493)
@@ -6316,7 +6316,7 @@ ATDT1234567</programlisting>
 	    or run this command after the system is up and
 	    running:</para>
 
-	  <screen>&prompt.user; <userinput>dmesg | grep -E "^sio[0-9]"</userinput>
+	  <screen>&prompt.user; <userinput>grep -E "^(sio|uart)[0-9] < /var/run/dmesg.boot"</userinput>
 sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
 sio0: type 16550A
 sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0