[PATCH] oops-tracing: mention extended VGA

Something I've found handy countless times when users do this..

Signed-off-by: Dave Jones <davej@redhat.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Documentation/oops-tracing.txt

@@ -32,7 +32,10 @@ the disk is not available then you have three options :-
     has restarted.  Messy but it is the only option if you have not
     planned for a crash. Alternatively, you can take a picture of
     the screen with a digital camera - not nice, but better than
-    nothing.
+    nothing.  If the messages scroll off the top of the console, you
+    may find that booting with a higher resolution (eg, vga=791)
+    will allow you to read more of the text. (Caveat: This needs vesafb,
+    so won't help for 'early' oopses)
 
 (2) Boot with a serial console (see Documentation/serial-console.txt),
     run a null modem to a second machine and capture the output there