Am 30.05.2017 09:14, schrieb Alkis Georgopoulos:
On 30/05/2017 10:05 πμ, Rolf-Werner Eilert wrote:
Yes, as I've written above, BIOS screen is shown, and boot menu is
shown, and the first few seconds of booting are shown. Only when
graphics is switched from text to graphics mode, the monitor says "no
signal" and goes to sleep mode. The client keeps booting until LDM and
seems not to be aware of a missing monitor.


 From epoptes, right click on the client, and select execute > open
terminal > root, locally.

There, type:
   xrandr
and paste the output here, and then:
   xrandr -s 800x600
and see if the screen now shows any output.

Maybe the client sends a bigger resolution than adapter/screen support.
If so, just use `xrandr -s xxx` until you find the proper one, and
finally put it in an lts.conf XRANDR_MODE_0 directive.


I tried this, xrandr says that all 3 graphics ports are disconnected, somehow like this:

Screen0: minimum 320x200, current 1024x768, maximum...
DP-1 disconnected primary (...)
DP-2 disconnected (...)
HDMI-1 disconnected (...)

Then I tried to force it to somewhat like 1280x1024, it does confirm, but still all ports remain disconnected.

Could I change this from BIOS? Or do I have another chance from lts.conf?

Regards
Rolf



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