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May 25, 2013, 10:24pm

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Topic: Xfce doesn't start if monitor is disconnected (Read 333 times)

klaus
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Xfce doesn't start if monitor is disconnected
« Thread Started on Dec 25, 2011, 3:56pm »

I want xfce to start even if no monitor is connected, but this doesn't work.

I've tested two computers A and B with salineos installations. When I disconnect the monitor before boot and reconnect it later this is what they do:
A: System is at the login prompt and is awaiting username input (but auto login is normally enabled).
B: Monitor doesn't show anything (no signal). However salineos has started booting, there's no BIOS problem (shutdown procedure seems to work when power button is pressed).

What might be the problem?

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beardedragon
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Re: Xfce doesn't start if monitor is disconnected
« Reply #1 on Dec 25, 2011, 5:05pm »

Try SalineOS PSE, the Personal Server Edition. It should run headless.

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Robert Collard, Madison, WI
HP s5710f, 2x AMD Athlon II 260@3.2Ghz 3GB RAM, 640GB HD
Debian 7.0 XFCE-4.10 3.2.0-4-amd64

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klaus
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Re: Xfce doesn't start if monitor is disconnected
« Reply #2 on Dec 25, 2011, 8:14pm »

Haven't known that there's a special edition for this

However I was able to solve the problem for the standard edition too:
One must adjust settings in /etc/X11/xorg.conf

What helped me was:
https://wiki.archlinux.org/index.php/NVIDIA#X_with_a_TV_.28DFP.29_as_the_only_display

Problem in general is that the x server is unable to retrieve the EDID information from the monitor.
Solution is to read the EDID from the monitor and save it to a file.
Then the file can be used to supply the EDID data.

In the xorg.conf file one must add the following lines into the "Device" section:

Option "ConnectedMonitor" "DFP"
Option "CustomEDID" "DFP-0:/etc/X11/dfp0.edid"

The edid file can be created via nvidia-settings or something else like read-edid package (but this haven't worked for me).

I needed to install the nvidia drivers first. Apparently the nouveau drivers can't handle these options.

Now it works without monitor

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