[mythtv-users] Occasional projector usage - X setup advice

[Mark Wedel]

On 09/28/2018 05:16 AM, Al Bates wrote:
> My ubuntu 16.04 myth setup runs 24/7 and normally displays on a TV connected to the DVI output of my system. But i’ve recently picked up an old projector which I’ve connected to the VGA output.
> 
> When they are both connected the projector is identified as Display1 @ 1280x1024, TV as  Display 2 @ 1360x768
> 
> NB The aspect ratio/fill settings of the myth video seem to get distorted because of the different ratio of the projector.
> 
> When I restart, myth ends up on the projector display. In order to have myth display normally on the TV, I have to disable the projector display via the ubuntu Settings/Display manager
> 
> I’d like to be able to just power up the projector as and when needed, and have the system move any interface or video playback onto that display, and have the ability to switch it back and forth via a script linked to a remote keypress or even a skin button?
> 
> I’m sure a lot of people have a similar setup so just wondering how you’ve handled it? Thanks for your help!

  You don't mention what graphics card you are using.  I'm using Nvidia, and 
have this in my Device section for my TV set:

Section "Device"
	Identifier "GT440"
	Driver "nvidia"
	Option "ConnectedMonitor" "DFP-2"
	Option "CustomEDID" "DFP-2:/etc/X11/sharp.edid"
	#Option "ModeDebug" "true"
	BusID	"PCI:2:0:0"
	MatchSeat	"seat1"
EndSection

  In that way, it will run the Xserver on that display even if the TV is turned off.

  I can't remember exactly how I got that edid data, but this article looks to 
be pretty complete:

https://kodi.wiki/view/Creating_and_using_edid.bin_via_xorg.conf