Framebuffer - Revision history

JulienB: /* Login/Console */

2023-01-18T11:16:57Z

← Older revision		Revision as of 13:16, 18 January 2023
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	<pre class="apf">		<pre class="apf">
	# echo 1 > /sys/class/graphics/fbcon/cursor_blink		# echo 1 > /sys/class/graphics/fbcon/cursor_blink
			</pre>
			* To have a login on LCD, add these line in /etc/inittab of your rootfs:
			<pre class="apf">
			# Set up a getty on LCD
			tty1::respawn:/sbin/getty 38400 tty1
	</pre>		</pre>

2023-01-18T11:15:26Z

Tips

← Older revision		Revision as of 13:15, 18 January 2023
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	==Tips==		==Tips==

			===Login/Console===
	* To stop blinking cursor:		* To stop blinking cursor:
	<pre class="apf">		<pre class="apf">
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	# echo 1 > /sys/class/graphics/fbcon/cursor_blink		# echo 1 > /sys/class/graphics/fbcon/cursor_blink
	</pre>		</pre>

			===Screenshot===
	* To grab a screenshot of a running Framebuffer application, use [[FBGrab]]		* To grab a screenshot of a running Framebuffer application, use [[FBGrab]]

			===Sleep===
	* To enter in Framebuffer sleep mode:		* To enter in Framebuffer sleep mode:
	<pre class="apf">		<pre class="apf">

2017-04-20T10:47:10Z

Links

← Older revision		Revision as of 12:47, 20 April 2017
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	=Links=		=Links=
	* [[Linux_Boot_Logo\|How to change the Linux boot logo]]		* [[Linux_Boot_Logo\|How to change the Linux boot logo]]
			* [[i.MX6 Framebuffer Overlay\|How to play with Framebuffer overlay on APF6]]
	* [http://lxr.linux.no/linux/Documentation/VGA-softcursor.txt How to configure soft cursor]		* [http://lxr.linux.no/linux/Documentation/VGA-softcursor.txt How to configure soft cursor]
	* http://linux-fbdev.sourceforge.net/		* http://linux-fbdev.sourceforge.net/

2016-01-21T09:00:01Z

Other usefull ESC sequences: add tip to erase the screen

← Older revision		Revision as of 11:00, 21 January 2016
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	<pre class="apf">		<pre class="apf">
	# echo -e '\033[?5l' > /dev/tty1		# echo -e '\033[?5l' > /dev/tty1
			</pre>
			* To erase the screen
			<pre class="apf">
			echo -e '\033[2J' > /dev/tty1 (from serial console)
	</pre>		</pre>

2014-07-21T08:23:31Z

← Older revision	Revision as of 10:23, 21 July 2014
(No difference)

2013-07-12T19:54:23Z

Kernel configuration

← Older revision		Revision as of 21:54, 12 July 2013
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	==Kernel configuration==		==Kernel configuration==
	{{Note \| Framebuffer is already configured (for [[LQ043_Adapt\|Sharp LQ043 LCD]] on [[APF9328]] and for Chimei LW700 on [[APF27]]/[[APF51]]) in standard/default Armadeus kernel image. [[APF28]] has a boot option to choose the LCD.}}		{{Note \| Framebuffer is already configured (for [[LQ043_Adapt\|Sharp LQ043 LCD]] on [[APF9328]] and for Chimei LW700 on [[APF27]]/[[APF51]]) in standard/default Armadeus kernel image. [[APF28]] has a boot option to [[APF28Dev#Selecting_LCD\|choose the LCD]].}}

	Instructions to configure Linux kernel were moved to [[Talk:FrameBuffer]] and are only given as references or if you want to change the default LCD.		Instructions to configure Linux kernel were moved to [[Talk:FrameBuffer]] and are only given as references or if you want to change the default LCD.

2013-01-23T13:56:01Z

Instructions moved to Talk:

@@ Line 6: / Line 6: @@
 ==Kernel configuration==
-{{Note | Framebuffer is already configured (for [[LQ043_Adapt|Sharp LQ043 LCD]] on [[APF9328]] and for Chimei LW700 on [[APF27]]/[[APF51]]) in standard/default Armadeus kernel image.}}
+{{Note | Framebuffer is already configured (for [[LQ043_Adapt|Sharp LQ043 LCD]] on [[APF9328]] and for Chimei LW700 on [[APF27]]/[[APF51]]) in standard/default Armadeus kernel image. [[APF28]] has a boot option to choose the LCD.}}
-Following instructions are only given as references or if you want to change the default LCD:
-* launch Linux kernel configuration:
+Instructions to configure Linux kernel were moved to [[Talk:FrameBuffer]] and are only given as references or if you want to change the default LCD.
 ==Userland==

2013-01-23T12:45:57Z

← Older revision		Revision as of 14:45, 23 January 2013
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	==Introduction==		==Introduction==
	Linux Framebuffer is the lowest level (standardized) API for userspace programs to access video capabilities of the system you're running on. It allows you to directly "draw" your graphics in the video memory.		Linux Framebuffer is the lowest level (standardized) API for userspace programs to access video capabilities of the system you're running on. It allows you to directly "draw" your graphics in the video memory.
	Some higher level librairies can be put on top of the Framebuffer for more portability: SDL, Qt, GTK, etc...		Some higher level librairies can be put on top of the Framebuffer for more portability: [[SDL]], [[Qt/Embedded]], GTK, DirectFB, etc...

	==Kernel configuration==		==Kernel configuration==

2013-01-23T12:41:08Z

Tips

← Older revision		Revision as of 14:41, 23 January 2013
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	<pre class="apf">		<pre class="apf">
	# echo 0 > /sys/class/graphics/fbcon/cursor_blink		# echo 0 > /sys/class/graphics/fbcon/cursor_blink
			</pre>
			also possible at boot time (with 3.x recent kernels):
			<pre class="apf">
			BIOS> setenv extrabootargs vt.global_cursor_default=0
	</pre>		</pre>
	* To make it blinking again:		* To make it blinking again:

2012-08-06T10:31:24Z

Kernel configuration

← Older revision		Revision as of 12:31, 6 August 2012
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	* launch Linux kernel configuration:		* launch Linux kernel configuration:
	<pre class="host">		<pre class="host">
	[armadeus]$ make ~~linux26~~-menuconfig		[armadeus]$ make linux-menuconfig
	</pre>		</pre>
	* activates:		* activates: