plugged and unplugged monitor

From	<michaelmorgan937@gmail.com>
Newsgroups	linux.debian.user
Subject	plugged and unplugged monitor
Date	2021-09-06 19:50 +0200
Message-ID	<CUqUN-1wq-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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I have a linux machine for scientific calculations with GPU installed. It
also installed GUI but normally the default start mode is just terminal
(multi-user.target). 

 

If I start up the machine with a monitor plugged into the GPU (HDMI or
Displayport), the monitor works well (showing the terminal). However, if I
unplug the 
HDMI cable and connect it back again, there will be no signal to the monitor
any more. The same thing happens if I start up the machine without a
monitor. I 
can ssh to the machine, but there is no signal if I plug in the monitor. 

 

What could be the problem? 

 

Thank you very much.

 

Michael

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plugged and unplugged monitor <michaelmorgan937@gmail.com> - 2021-09-06 19:50 +0200
  Re: plugged and unplugged monitor Linux-Fan <Ma_Sys.ma@web.de> - 2021-09-06 21:00 +0200

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