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Asked: 2026-05-31T06:13:09+00:00

I met a problem. I had a server which is installed redhat enterprise 5.5.

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I met a problem.
I had a server which is installed redhat enterprise 5.5.
And one Qt program was running on this server.
So what I should do is to turn on my server, the server will start automaticly with Gui and that Qt program will start automaticly.
I finished all on my desktop.
But while I start this server without monitor, we know server was running without monitor,the X server go bad.God, what should I do?

Here is the xorg log:

[root@localhost grub]# tail -n 30 /var/log/Xorg.0.log
ABI class: X.Org Video Driver, version 1.0
(II) Loading sub module "i2c"
(II) LoadModule: "i2c"
(II) Loading /usr/lib/xorg/modules/libi2c.so
(II) Module i2c: vendor="X.Org Foundation"
compiled for 7.1.1, module version = 1.2.0
ABI class: X.Org Video Driver, version 1.0
(II) intel(0): Output VGA has no monitor section
(II) intel(0): I2C bus "CRTDDC_A" initialized.
(II) intel(0): EDID for output VGA
(II) intel(0): Output VGA disconnected
(WW) intel(0): No outputs definitely connected, trying again...
(II) intel(0): Output VGA disconnected
(WW) intel(0): Unable to find initial modes
(EE) intel(0): No valid modes.
(II) UnloadModule: "intel"
(II) UnloadModule: "i2c"
(II) Unloading /usr/lib/xorg/modules/libi2c.so
(II) UnloadModule: "ddc"
(II) Unloading /usr/lib/xorg/modules/libddc.so
(II) UnloadModule: "vgahw"
(II) Unloading /usr/lib/xorg/modules/libvgahw.so
(II) UnloadModule: "vbe"
(II) Unloading /usr/lib/xorg/modules/libvbe.so
(II) UnloadModule: "int10"
(II) Unloading /usr/lib/xorg/modules/libint10.so
(EE) Screen(s) found, but none have a usable configuration.
Fatal server error:
no screens found

I searched on internet,somebody told me that I should add nomodeset in the end of the kernel line in /boot/grub/grub.conf.I did it but nothing changed.
Can anybody tell me what should I do?

smarthand123@163.com

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1 Answer

  1. Editorial Team

    Your problem is that the X server checks whether there is really a monitor attached. Your options:

    1. Attach a monitor. Simple but wasteful.

    2. Use Xvnc instead. This is like X but it renders to memory, so it doesn’t need a graphics card (and no drivers) and no monitor. You can even connect to it remotely via the VNC protocol.

    The second option is actually pretty simple to implement: Just call vncserver :42

    After export DISPLAY=:42, you can run your Qt application and it will connect to the virtual Xvnc server running on the virtual display 42 (0 is the default).

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