path: root/Documentation/fb
diff options
authorDavid Lechner <>2017-08-18 19:56:40 +0200
committerBartlomiej Zolnierkiewicz <>2017-08-18 19:56:40 +0200
commit74c1c8b3326a366d39aa74e1737a28d4cba151c8 (patch)
tree821b7647c8fc9e41f4b02eb1897d3e7e4569d980 /Documentation/fb
parent16622a8e7e46fab31fd33ca5a23672385de240f6 (diff)
fbcon: add fbcon=margin:<color> command line option
This adds a new command line option to select the fbcon margin color. The motivation for this is screens where black does not blend into the physical surroundings of the screen. For example, using an LCD (not the backlit kind), white text on a black background is hard to read, so inverting the colors is preferred. However, when you do this, most of the screen is filled with white but the margins are still filled with black. This makes a big, black, backwards 'L' on the screen. By setting fbcon=margin:7, the margins will be filled with white and the LCD looks as expected. Signed-off-by: David Lechner <> [b.zolnierkie: ported over fbcon changes] Signed-off-by: Bartlomiej Zolnierkiewicz <>
Diffstat (limited to 'Documentation/fb')
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/fb/fbcon.txt b/Documentation/fb/fbcon.txt
index 4a9739abc860..1822b190ccd6 100644
--- a/Documentation/fb/fbcon.txt
+++ b/Documentation/fb/fbcon.txt
@@ -148,6 +148,13 @@ C. Boot options
Actually, the underlying fb driver is totally ignorant of console
+5. fbcon=margin:<color>
+ This option specifies the color of the margins. The margins are the
+ leftover area at the right and the bottom of the screen that are not
+ used by text. By default, this area will be black. The 'color' value
+ is 0 to 7 where 0 is black and 7 is white.
C. Attaching, Detaching and Unloading
Before going on how to attach, detach and unload the framebuffer console, an