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[PATCH 2/2] docs: Add documentation for the efitextmode command

From: Glenn Washburn
Subject: [PATCH 2/2] docs: Add documentation for the efitextmode command
Date: Wed, 11 May 2022 22:07:35 -0500

Signed-off-by: Glenn Washburn <>
 docs/grub.texi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/docs/grub.texi b/docs/grub.texi
index 3b5522b0a..50ef28edd 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -4202,6 +4202,7 @@ you forget a command, you can run the command 
 * distrust::                    Remove a pubkey from trusted keys
 * drivemap::                    Map a drive to another
 * echo::                        Display a line of text
+* efitextmode::                 Set/Get text output mode resolution
 * eval::                        Evaluate agruments as GRUB commands
 * export::                      Export an environment variable
 * false::                       Do nothing, unsuccessfully
@@ -4638,6 +4639,28 @@ character will print that character.
 @end deffn
+@node efitextmode
+@subsection efitextmode
+@deffn Command efitextmode [min | max | mode_num]
+When used with no arguments displays all available text output modes. The
+set mode determines the columns and rows of the text display when in
+text mode. An asterisk, @samp{*}, will be at the end of the line of the
+currently set mode.
+Otherwise the command only takes a single parameter, which can be
+@samp{min}, @samp{max}, or a mode number given by the listing when run
+with no arguments. These arguments set the mode to the minimum, maximum,
+and particular mode respectively.
+By default GRUB will start in whatever mode the EFI firmware defaults to.
+There are firmwares known to setup the default mode such that output
+behaves strangely. Setting the mode can fix this.
+Note: This command is only available on EFI platforms.
+@end deffn
 @node eval
 @subsection eval

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