去掉光标和制作Logo

一、去除Llinux 的开机光标
    在内核的当前目录进入到drivers/video/console/fbcon.c 文件
    将static void fb_flashcursor(void *private) 和 static void fbcon_cursor(struct vc_data *vc, int mode) 里的内容注释掉,使之变成空函数。

二、设置Linux内核启动Logo
(1)让内核支持启动LOGO
    在内核目录中 make menuconfig
    Device Drivers ---->   Graphics support ---->
    选中 Bootup logo ----> Standard 224-color Linux logo

(2)制作一张启动LOGO的PNG格式的图片logo_linux_clut224.png

(3)sudo apt-get install netpbm
    #pngtopnm logo_linux_clut224.png > logo_linux.pnm
    #pnmquant 224 logo_linux.pnm > logo_linux_224.pnm
    #pnmtoplainpnm logo_linux_224.pnm > logo_linux_clut224.ppm 

(4)将LOGO文件放入内核中
    拷贝到制作好的LOGO文件到  /drivers/video/logo 文件夹
    替换  logo_linux_clut224.ppm 文件

 (5)重新编译内核

三、居中显示
Linux 内核启动 Logo 居中显示需要修改下列两个源文件：
1.）drivers/video/console/fbcon.c
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 10c0b74..cdb3b6c 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -589,6 +589,7 @@ static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
        if (fb_get_color_depth(&info->var, &info->fix) == 1)
                erase &= ~0x400;
        logo_height = fb_prepare_logo(info, ops->rotate);
+       logo_height += (info->var.yres/2)-(logo->height/2);
        logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
        q = (unsigned short *) (vc->vc_origin +
                                vc->vc_size_row * rows);


2.）drivers/video/fbmem.c
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index b066475..c8e7fc0 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -468,8 +468,8 @@ static int fb_show_logo_line(struct fb_info *info, int rotate,
                fb_set_logo(info, logo, logo_new, fb_logo.depth);
        }
 
-       image.dx = 0;
-       image.dy = y;
+       image.dx = (info->var.xres/2)-(logo->width/2);
+       image.dy = (info->var.yres/2)-(logo->height/2);
        image.width = logo->width;
        image.height = logo->height;