Signed-off-by: Glenn Washburn <developm...@efficientek.com>
---
docs/grub.texi | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/docs/grub.texi b/docs/grub.texi
index 5de94d062..178957096 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -4049,6 +4049,7 @@ you forget a command, you can run the command
@command{help}
* 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
@@ -4505,6 +4506,31 @@ 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 set up the default mode such that output
+behaves strangely, for example the cursor in the grub shell never reaches
+the bottom of the screen or, when typing characters at the prompt,
+characters from previous command output are overwritten. Setting the mode
+may fix this.
+
+Note: This command is only available on EFI platforms.
+@end deffn
+
+
@node eval
@subsection eval
--
2.34.1
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