如何将我的LCD设置为默认LCD？

Question

我有一个基于ARM的板(M1)，并在上面使用Ubuntu 16.04 .我有一个带有SPI连接的2.2“TFT-LCD，并使用此框架缓冲驱动程序(https://github.com/notro/fbtft)启动它。我可以使用以下命令设置我的液晶显示器：

sudo modprobe fbtft_device custom name=fb_ili9341 gpios=reset:1,dc:201,led:6 speed=16000000 rotate=90 bgr=1

在此之前，当我拥有Ubuntu桌面时，我可以通过以下命令更改显示：

FRAMEBUFFER=/dev/fb8 startx

但是在Ubuntu-server中，我得到了以下错误消息：

X.Org X Server 1.18.4
Release Date: 2016-07-19
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-97-generic armv7l Ubuntu
Current Operating System: Linux nanopim1 3.4.113-sun8i #16 SMP PREEMPT Tue Jun 13 14:15:57 CEST 2017 armv7l
Kernel command line: root=UUID=10b3b795-f372-4ea9-b78a-93ae9355c20c rootwait rootfstype=ext4 console=tty1 console=ttyS0,115200 hdmi.audio=EDID:0 disp.screen0_output_mode=1920x1080p60 panic=10 consoleblank=0 loglevel=1 ubootpart=bd75a2d6-01 ubootsource=mmc   sunxi_ve_mem_reserve=0 sunxi_g2d_mem_reserve=0 sunxi_fb_mem_reserve=16 cgroup_enable=memory swapaccount=1
Build Date: 13 October 2017  01:59:44PM
xorg-server 2:1.18.4-0ubuntu0.7 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.33.6
    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
    (++) from command line, (!!) notice, (II) informational,
    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Thu Oct 26 16:44:04 2017
(==) Using config directory: "/etc/X11/xorg.conf.d"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(EE) 
Fatal server error:
(EE) no screens found(EE) 
(EE) 
Please consult the The X.Org Foundation support 
     at http://wiki.x.org
 for help. 
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE) 
(EE) Server terminated with error (1). Closing log file.

只有一个空白的屏幕。我想知道如何设置这个LCD作为我的板默认液晶显示器，并使它运行。

此外，我必须说，我也安装了xorg和openbox。

Answer 1

我试过以下步骤：

添加到文件/etc/modules-load.d/fbtft.conf

spi-bcm2835

fbtft_device

添加到文件/etc/modprobe.d/fbtft.conf

options fbtft_device custom name=fb_ili9341 gpios=reset:1,dc:201,led:6 speed=16000000 rotate=90 bgr=1

添加到/etc/rc.local中

startx

我的SPI在系统启动时自动工作。