Arch Linux

BastlWastl

Member

From: Germany

Registered: 2013-04-27

Posts: 4

Gnome 3.10 internal Display not turned off with external Monitor

Hello,

Scince the update to Gnome 3.10 it is not possible to turn off my internal Display when an external Display is connected.
I want to turn off the internal Laptopdisplay and use only the external.

In Systemsettings Gnome detected 3 Monitors, which is wrong.

1. Internal Display(marked as Secondary Display by me)
2. Unknown 0" (which is marked as off by the System)
3. Samsung 19" (marked as primary Display be me)

I suspect that the second Monitor is causing the Problem.

When i click on "Internal Display" and choose "Off" the Screen flickers a short Time but after that nothing has changed.

Gnome works as if a would have chosen an extended Desktop setting with the internal Display as secondary Device.

Any suggestions how to solve this would be great.

Thanks in advance.

BastlWastl

gnunn

Member

Registered: 2013-10-21

Posts: 102

Re: Gnome 3.10 internal Display not turned off with external Monitor

Does it work if you turn off the screen using xrandr in the command line? Also, what does xrandr show for displays?

BastlWastl

Member

From: Germany

Registered: 2013-04-27

Posts: 4

Re: Gnome 3.10 internal Display not turned off with external Monitor

Thanks for your reply gnunn.

Turn off with 

xrandr --output LVDS1 --off

via commandline results in a short flickering where both screens are off and coming back on after one second. The same behaviour as with the Gnome GUI.

xrandr show this:

sebastian@Wastl2Go ~ $ xrandr
Screen 0: minimum 320 x 200, current 2560 x 1024, maximum 32767 x 32767
LVDS1 connected 1280x800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1280x800       60.0*+   40.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 connected primary 1280x1024+1280+0 (normal left inverted right x axis y axis) 376mm x 301mm
   1280x1024      60.0*+   75.0  
   1280x960       60.0  
   1152x864       75.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     60.0  
   720x400        70.1  
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)
TV1 unknown connection (normal left inverted right x axis y axis)
   848x480        59.9 +
   640x480        59.9 +
   1024x768       59.9  
   800x600        59.9  

I have no Idea what is ment by TV1. My Laptop is a Dell Latitude E5500 which has only the VGA connector for external Monitors.

drilloman

Member

Registered: 2015-01-24

Posts: 1

Re: Gnome 3.10 internal Display not turned off with external Monitor

Hi,
you are right the problem is the second monitor, I reached the same conclusion so I focused my attention on it.
I have a similar configuration with the same issue on my Fedora 20 and I solved editing the xorg.conf.
I had to create a new 10-intel.conf in /etc/X11/xorg.conf.d because my system don't create it but you can use an existing one (ie xorg.conf) if your system is different.
The important thing is that you have a piece of code like this

Section "Monitor"
        Identifier "TV1"
        Option "Ignore" "true"
EndSection

Now I can turn off my LVDS1 via Gnome Setting > Display or xrandr

xrandr --output LVDS1 --off

because the "ghost" output isn't anywhere any more.
I tried another solution adding the kernel parameter

video=TV1:d

but it didn't work or better, worked randomly, giving more times the sequence

xrandr --auto
xrandr --output LVDS1 --off

Hope this help, bye.