[mythtv-users] Running TV out OR DVI out, not both

[Allen Edwards]

On Sat, Dec 6, 2008 at 11:49 PM, Bill Williamson <bill at bbqninja.com> wrote:
> On Sun, Dec 7, 2008 at 6:36 PM, Bill Williamson <bill at bbqninja.com> wrote:
>> On Sun, Dec 7, 2008 at 4:56 PM, Allen Edwards <allen.p.edwards at gmail.com> wrote:
>>>
>>> On Sat, Dec 6, 2008 at 8:26 PM, Bill Williamson <bill at bbqninja.com> wrote:
>>> > This is a bit more of a basic Linux question, so please forgive, but has
>>> > specifics that are valid here.  For reference, I am running ubuntu 8.10 and
>>> > myth .21 from mythbuntu packages.
>>> >
>>> > Basically what I want is a dual headed machine where only 1 head is active
>>> > at a time.  I got a nice new geforce 8400 for future use with VDAPU, and it
>>> > has tv out (going to a smaller PAL tv via component) and dvi out (going to a
>>> > 720p projector via hdmi converter).  I want to be able to run via TV, OR run
>>> > via projector.  I do not care (nor want) dual outputs.
>>> >
>>> > In the olden days (slackware 1998-ish), before gdm and the like, I'd just
>>> > run "startx" from my first two terminals, and use ctrl-alt-f7 and
>>> > ctrl-alt-f8 for the two x sessions.  I don't want to do something that
>>> > manual, but is there perhaps an easy way to tell GDM to spawn twice, with a
>>> > different xorg config?  Or is there a way to force the nvidia
>>> >
>>> > I don't mind having to do a key combination (and run blind for 10 seconds if
>>> > it starts in the wrong one), but don't want to be dropping to console/etc
>>> > every login.  I don't mind if technically it's running two x-servers as long
>>> > as mythtv works, and with the correct settings for each (I guess I'd set up
>>> > two different settings names in two different shortcuts?)
>>> >
>>> > My "ideal" setup would be similar how laptops work in windows.  You hit some
>>> > key combinations to activate TV-Out, then another combo to disable it.
>>> >
>>> > _______________________________________________
>>> > mythtv-users mailing list
>>> > mythtv-users at mythtv.org
>>> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>> >
>>> >
>>>
>>> You have the same setup I have.  Normally I watch myth with S-video
>>> out playing to a CRT TV.  When we want to use the projector, we use
>>> DVI output to a HDMI projector.  I have tried several arrangements but
>>> what I do it to have the projector switched away from the myth box (by
>>> selecting DVD on my DVI switching preamp) and start X so that it
>>> starts up on the TV.  I then do a CTRL-ALT-BS and myth shows up on the
>>> TV.  Turn the projector on and switch to it, CTRL-ALT-BS and in a few
>>> seconds myth is on the projector.  The Xorg.conf setup is key to
>>> making the setup work.  The outputs are assigned single resolutions,
>>> not auto.  I have two displays defined in xorg.  Basically if myth
>>> sees the projector, it starts up there, if not it starts up on the TV.
>>>
>>> There are other ways of doing this.  You can start myth on either
>>> display if both display/desktops are there but be sure to close myth
>>> down if you leave a display.  You can switch desktops with the mouse
>>> but the problem is that the remote will operate both instances of myth
>>> if you happen to have one on each desktop/display.  With two instances
>>> running, they will get out of sync and you have no idea what the one
>>> you are not watching is doing.  Since you cannot see a screen that is
>>> turned off, this can be a problem which led to my solution being
>>> easier even though it seems crude.
>>>
>>> If I didn't have a preamp that switched the DVI for me, I would
>>> probably just unplug the hdmi cable into the projector so that myth
>>> would not see it when X starts up.
>>>
>>> Hope this helps,
>>>
>>> Allen
>>
>> Can you post your xorg (or mail it to me privately?) That REALLY may
>> work for me, as I can boot with the projector off most of the time,
>> and with it on (and restart X) when I want.
>>
>
>
> Actually, current research may help both of us.  If you don't mind the
> ctrl-alt-f7 business, in /etc/gdm/gdm.conf there is a [servers]
> section... you can make it run more than one, and (hopefully?) specify
> the config file X will use!
>

I can make it run more than one desktop with this setup.  The problem
is that the remote works both instances of myth if I forget and leave
one on while I am watching the other.

There us a command I issue from one of the init files that deals with
overscan on the TV.  Let me know if you need that as well.  If you
don't know what I mean, you don't need it.  It is for the case where
the TV picture won't fill the screen.

Allen


Section "Screen"
	Identifier	"Screen0"
	Device		"Videocard0"
	Monitor		"Monitor0"
	Option		"TwinView"	"0"
	Option		"metamodes"	"DFP: 1280x720_60 +0+0"
	Option		"AddARGBGLXVisuals"	"True"
	SubSection "Display"
		Depth	24
	EndSubSection
	Defaultdepth	24
EndSection

Section "Screen"
	Identifier	"Screen1"
	Device		"Videocard1"
	Monitor		"Monitor1"
	Option		"TwinView"	"0"
	Option		"metamodes"	"TV: nvidia-auto-select +0+0"
	Option		"AddARGBGLXVisuals"	"True"
	SubSection "Display"
		Depth	24
	EndSubSection
	Defaultdepth	24
EndSection

Section "Device"
	Identifier	"Videocard0"
	Driver		"nvidia"
	Vendorname	"NVIDIA Corporation"
	Boardname	"GeForce 6200 LE"
	Busid		"PCI:1:0:0"
        Option    "UseEvents" "True"
	Option		"UseDisplayDevice"	"DFP"
	Screen	0
EndSection

Section "Device"
	Identifier	"Videocard1"
	Driver		"nvidia"
	Vendorname	"NVIDIA Corporation"
	Boardname	"GeForce 6200 LE"
        Option    "UseEvents" "True"
	Busid		"PCI:1:0:0"
	Option		"UseDisplayDevice"	"TV-0"
	Screen	1
EndSection

Section "InputDevice"
	# generated from default
	Identifier	"Mouse0"
	Driver		"mouse"
	Option		"Protocol"	"auto"
	Option		"Device"	"/dev/psaux"
	Option		"Emulate3Buttons"	"no"
	Option		"ZAxisMapping"	"4 5"
EndSection

Section "InputDevice"
	# generated from default
	Identifier	"Keyboard0"
	Driver		"kbd"
EndSection

Section "ServerLayout"
	Identifier	"Layout0"
  screen 0 "Screen0" 0 0
  screen 1 "Screen1" rightof "Screen0"
	Inputdevice	"Keyboard0"	"CoreKeyboard"
	Inputdevice	"Mouse0"	"CorePointer"
EndSection

Section "Module"
	Load		"dbe"
	Load		"extmod"
	Load		"type1"
	Load		"freetype"
	Load		"glx"
EndSection

Section "Monitor"
	# HorizSync source: edid, VertRefresh source: edid
	Identifier	"Monitor0"
	Vendorname	"Unknown"
	Modelname	"Panasonic AX-100"
	Horizsync	28.0	-	49.0
	Vertrefresh	24.0	-	61.0
	Option		"DPMS"
EndSection

Section "Monitor"
	# HorizSync source: xconfig, VertRefresh source: xconfig
	Identifier	"Monitor1"
	Vendorname	"Unknown"
	Modelname	"TV-0"
	Horizsync	28.0	-	49.0
	Vertrefresh	24.0	-	61.0
	Option		"DPMS"
	Option		"TVOverScan"	"1.0"
EndSection

Section "ServerFlags"
	Option		"Xinerama"	"0"
EndSection

Section "Extensions"
	Option		"Composite"	"Enable"
EndSection

Section "Files"
	Rgbpath		"/usr/X11R6/lib/X11/rgb"
EndSection