无外接物理显示器的Ubuntu系统的远程桌面连接(升级版)

操作步骤

“远程连接”,在设置里直接打开就可以.进行配置就行.

1.配置 GRUB 以支持无显示器启动
sudo nano /etc/default/grub
(里面有一行改为:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=vesa:off video=efifb:off nomodeset")

2.保存后更新 grub
sudo update-grub

3.设置自动登录
sudo nano /etc/gdm3/custom.conf
(修改添加:
AutomaticLoginEnable=True
AutomaticLogin=robot
WaylandEnable=false)

4.重启 GDM 服务
sudo systemctl restart gdm3

5.打开"密码和密钥" 应用程序
seahorse
(右击 "登录" ,单击 "更改密码",输入原密码后,空着密码行不输入,点击确定继续)

实践截图

这样就可以在局域网内其他电脑上,远程桌面连接访问无外接显示器的Ubuntu22.04系统的计算机.

配置 Xorg 的虚拟显示界面(升级版)

上面的配置完成后,显示的界面分辨率仅为 1080×738 .
此升级版就是想要将虚拟显示界面分辨率设置为 1920×1080 .

此配置的前提是禁用 Wayland 的界面,显示界面系统为 Xorg(X11).
查看界面:

echo $XDG_SESSION_TYPE

输出 x11 -> Xorg .
输出 wayland -> Wayland .

首先是 “/etc/default/grub” 文件更改为:

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=vesa:1920x1080 video=efifb:off"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
GRUB_GFXMODE=1920x1080

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

安装虚拟显示器驱动(xserver-xorg-video-dummy):
安装虚拟显示器驱动,强制系统识别 “虚拟屏幕” ,支持分辨率(如1920×1080).

1.
sudo apt install xserver-xorg-video-dummy

2.
sudo nano /etc/X11/xorg.conf.d/10-dummy.conf

添加内容:

Section "Device"
    Identifier "DummyDevice"
    Driver "dummy"
    VideoRam 256000
EndSection

Section "Monitor"
    Identifier "DummyMonitor"
    HorizSync 5.0-75.0
    VertRefresh 50.0-75.0
    Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
EndSection

Section "Screen"
    Identifier "Default Screen"
    Device "DummyDevice"
    Monitor "DummyMonitor"
    DefaultDepth 24
    SubSection "Display"
        Depth 24
        Modes "1920x1080"
    EndSubSection
EndSection

重新启动后,就不会在外接显示器上显示界面了,只有通过虚拟界面进行显示,若要恢复的话,只需要删除 “/etc/X11/xorg.conf.d/10-dummy.conf” 文件即可.