Starting from ubuntu 18.04 LTS, if display is not connected, screen does not refresh if connected over VNC

Firoz

12/19/22, 9:14 AM

Starting from ubuntu 18.04 LTS, if display is not connected, screen does not refresh if connected over VNC. Anybody noticed?

To fix this, either we have connect physical display to system or we have to install dummy display packages and create xorg.conf file display configs File '/etc/X11/xorg.conf' content:

Section "Device"    Identifier  "Configured Video Device"
    Driver      "dummy"
    VideoRam 256000
EndSection
Section "Monitor"
    Identifier  "Configured Monitor"
    HorizSync 5.0 - 1000.0
    VertRefresh 5.0 - 200.0
    ModeLine "1920x1080" 148.50 1920 2448 2492 2640 1080 1084 1089 1125 +Hsync +Vsync
EndSection
Section "Screen"
    Identifier  "Default Screen"
    Monitor     "Configured Monitor"
    Device      "Configured Video Device"
    DefaultDepth 24
    SubSection "Display"
    Depth 24
    Modes "1920x1080"
    EndSubSection
EndSection

Packages to be installed:

sudo apt-get install xorg-video-abi-23 -y;
sudo apt-get install xserver-xorg-video-dummy -y;
sudo apt-get install xserver-xorg-core -y

Do we have any fix for this or an alternative? Because it's not feasible to connect the physical display to each machine and installing a dummy display will not provide any output on the physical display in case we want to debug the system issue directly.

0 + 0

vnc

xorg

18.04

20.04

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Starting from ubuntu 18.04 LTS, if display is not connected, screen does not refresh if connected over VNC

TH: เริ่มจาก Ubuntu 18.04 LTS หากไม่ได้เชื่อมต่อจอแสดงผล หน้าจอจะไม่รีเฟรชหากเชื่อมต่อผ่าน VNC

RO: Începând de la ubuntu 18.04 LTS, dacă afișajul nu este conectat, ecranul nu se reîmprospătează dacă este conectat prin VNC

RU: Начиная с Ubuntu 18.04 LTS, если дисплей не подключен, экран не обновляется при подключении через VNC.

VI: Bắt đầu từ Ubuntu 18.04 LTS, nếu màn hình không được kết nối, màn hình không làm mới nếu được kết nối qua VNC

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