Eu tenho uma placa baseada em ARM ( link ) e uso o Ubuntu-server 16.04 nela. Eu tenho um 2.2 "TFT-LCD com conexão SPI, e use este driver framebuffer ( link ) para lançá-lo. LCD com este comando:
sudo modprobe fbtft_device custom name=fb_ili9341 gpios=reset:1,dc:201,led:6 speed=16000000 rotate=90 bgr=1
E antes, quando eu tinha o Ubuntu desktop, eu podia mudar a exibição com este comando:
FRAMEBUFFER=/dev/fb8 startx
Mas no servidor Ubuntu recebo esta mensagem de erro:
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.
E tem apenas uma tela em branco. Eu quero saber como posso definir este LCD como meu LCD padrão e fazê-lo funcionar.
Além disso, devo dizer que eu instalei o xorg e o openbox também.
EDITAR:
Eu encontrei este arquivo de configuração do raspberryPi e tentei substituí-lo neste arquivo: /etc/X11/xorg.conf.d/01-armbian-defaults.conf :
# FBTFT xorg config file
#
# startx -- -layout TFT
# startx -- -layout HDMI
#
# startx
# When -layout is not set, the first is used: TFT
#
Section "ServerLayout"
Identifier "TFT"
Screen 0 "ScreenTFT"
EndSection
Section "ServerLayout"
Identifier "HDMI"
Screen 0 "ScreenHDMI"
EndSection
Section "Screen"
Identifier "ScreenHDMI"
Monitor "MonitorHDMI"
Device "DeviceHDMI"
Endsection
Section "Screen"
Identifier "ScreenTFT"
Monitor "MonitorTFT"
Device "DeviceTFT"
Endsection
Section "Monitor"
Identifier "MonitorHDMI"
Endsection
Section "Monitor"
Identifier "MonitorTFT"
Endsection
Section "Device"
Identifier "DeviceHDMI"
Driver "fbturbo"
Option "fbdev" "/dev/fb0"
Option "SwapbuffersWait" "true"
EndSection
Section "Device"
Identifier "DeviceTFT"
Option "fbdev" "/dev/fb1"
EndSection
Mas não funcionou.
Este é o conteúdo antes de substituir:
Section "Monitor"
Identifier "Monitor0"
Option "DPMS" "false"
EndSection
Section "ServerFlags"
Option "BlankTime" "0"
Option "StandbyTime" "0"
Option "SuspendTime" "0"
Option "OffTime" "0"
EndSection