Commit cc3c2a62 authored by Bhaskar Chowdhury's avatar Bhaskar Chowdhury Committed by Jonathan Corbet
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docs: fb: Remove framebuffer scrollback boot option 



In commit 50145474 ("fbcon: remove soft scrollback code"), the
framebuffer scrollback mode was removed, but the documentation was not
updated.  Properly update the documentation by removing the option that
is no longer present, and update the section numbering because of the
removal.

Signed-off-by: default avatarBhaskar Chowdhury <unixbhaskar@gmail.com>
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/436cc046a8ff9cf2a467b633527db77dc7c7de19.1600333774.git.unixbhaskar@gmail.com


Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent 04301bf5

Documentation/fb/fbcon.rst

+7 −14
Original line number Diff line number Diff line
@@ -87,15 +87,8 @@ C. Boot options 
	Note, not all drivers can handle font with widths not divisible by 8,

	such as vga16fb.



2. fbcon=scrollback:<value>[k]



	The scrollback buffer is memory that is used to preserve display

	contents that has already scrolled past your view.  This is accessed

	by using the Shift-PageUp key combination.  The value 'value' is any

	integer. It defaults to 32KB.  The 'k' suffix is optional, and will

	multiply the 'value' by 1024.



3. fbcon=map:<0123>

2. fbcon=map:<0123>



	This is an interesting option. It tells which driver gets mapped to

	which console. The value '0123' is a sequence that gets repeated until
@@ -116,7 +109,7 @@ C. Boot options 
	Later on, when you want to map the console the to the framebuffer

	device, you can use the con2fbmap utility.



4. fbcon=vc:<n1>-<n2>

3. fbcon=vc:<n1>-<n2>



	This option tells fbcon to take over only a range of consoles as

	specified by the values 'n1' and 'n2'. The rest of the consoles
@@ -127,7 +120,7 @@ C. Boot options 
	is typically located on the same video card.  Thus, the consoles that

	are controlled by the VGA console will be garbled.



5. fbcon=rotate:<n>

4. fbcon=rotate:<n>



	This option changes the orientation angle of the console display. The

	value 'n' accepts the following:
@@ -152,21 +145,21 @@ C. Boot options 
	Actually, the underlying fb driver is totally ignorant of console

	rotation.



6. fbcon=margin:<color>

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 an integer number that depends on the framebuffer driver being used.



7. fbcon=nodefer

6. fbcon=nodefer



	If the kernel is compiled with deferred fbcon takeover support, normally

	the framebuffer contents, left in place by the firmware/bootloader, will

	be preserved until there actually is some text is output to the console.

	This option causes fbcon to bind immediately to the fbdev device.



8. fbcon=logo-pos:<location>

7. fbcon=logo-pos:<location>



	The only possible 'location' is 'center' (without quotes), and when

	given, the bootup logo is moved from the default top-left corner
@@ -174,7 +167,7 @@ C. Boot options 
	displayed due to multiple CPUs, the collected line of logos is moved

	as a whole.



9. fbcon=logo-count:<n>

8. fbcon=logo-count:<n>



	The value 'n' overrides the number of bootup logos. 0 disables the

	logo, and -1 gives the default which is the number of online CPUs.