[mythtv-users] DVI vs. S-Video
Phil Bridges
gravityhammer at gmail.com
Wed Jan 16 02:52:47 UTC 2008
On Jan 15, 2008 9:46 PM, Harry Devine <lifter89 at comcast.net> wrote:
>
> Phil Bridges wrote:
> > On Jan 15, 2008 8:54 PM, Harry Devine <lifter89 at comcast.net> wrote:
> >
> >> Phil Bridges wrote:
> >>
> >>> On Jan 15, 2008 7:14 PM, Harry Devine <lifter89 at comcast.net> wrote:
> >>>
> >>>
> >>>> Phil Bridges wrote:
> >>>>
> >>>>
> >>>>> On Jan 14, 2008 8:01 AM, Harry Devine <lifter89 at comcast.net> wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>> Phil Bridges wrote:
> >>>>>>
> >>>>>> On Jan 13, 2008 8:36 PM, Harry Devine <lifter89 at comcast.net> wrote:
> >>>>>>
> >>>>>>
> >>>>>> Rich West wrote:
> >>>>>> Harry Devine wrote:
> >>>>>>
> >>>>>> Everyone,
> >>>>>>
> >>>>>> I currently have an EVGA nVidia based e-GeForce 7100GS video card in my
> >>>>>> Myth box, and I'm using the S-Video out to push the TV-Out to my Samsung 46"
> >>>>>> DLP HDTV. I've been thinking about this for a few days, and I believe that
> >>>>>> I should be using the DVI connection from that card to my TV. I have 2 HDMI
> >>>>>> inputs on my TV and 1 is being used to receive signals from my Comcast
> >>>>>> Motorola STB.
> >>>>>>
> >>>>>> I'm a little unsure how to configure my xorg.conf file to do this. Also, I
> >>>>>> suppose that I'll have to get a DVI-to-HDMI cable. Am I correct in this?
> >>>>>> I'm adding my current xorg.conf file contents below, so if anyone has any
> >>>>>> ideas, I'm all ears.
> >>>>>>
> >>>>>> The title of the Wiki entry is a bit misleading, but check out
> >>>>>> http://www.mythtv.org/wiki/index.php/ComponentOut for details on how to get
> >>>>>> this set up.
> >>>>>>
> >>>>>> -Rich
> >>>>>>
> >>>>>>
> >>>>>> Hey Rich!
> >>>>>>
> >>>>>> I just got around to getting the DVI->HDMI cable hooked up, and I can't get
> >>>>>> it working from within Linux. When my Myth box reboots, I can put my TV on
> >>>>>> HDMI2 and see the boot up process. However, once the X server starts, I get
> >>>>>> nothing. I don't see anything in my /var/log/Xorg.0.log file that indicates
> >>>>>> any problem. I tried to follow the link in the Wiki that you sent, as well
> >>>>>> as the following article to no avail:
> >>>>>> http://www.fedoraforum.org/forum/showthread.php?p=721770#post721770.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Section "Device"
> >>>>>> Identifier "Videocard0"
> >>>>>> Driver "nvidia"
> >>>>>> VendorName "nVidia"
> >>>>>> BoardName "NVIDIA GeForce"
> >>>>>> Option "TwinView"
> >>>>>> Option "TwinViewOrientation" "Clone"
> >>>>>> Option "ConnectedMontior" "CRT, TV"
> >>>>>> Option "SecondMonitorHorizSync" "30-50"
> >>>>>> Option "SecondMonitorVerRefresh" "60"
> >>>>>> Option "TVStandard" "NTSC-M"
> >>>>>> Option "TVOutFormat" "Composite"
> >>>>>>
> >>>>>>
> >>>>>> As long as you tell your Xorg to send X out of the "Composite" output
> >>>>>> of your card, that's where it will be output.
> >>>>>>
> >>>>>> Read this: http://gentoo-wiki.com/HOWTO_Xorg_HDTV#Nvidia_Settings
> >>>>>>
> >>>>>>
> >>>>>> Apparently not, because that's what I have (see "TVOutFormat" above) and I
> >>>>>> get nothing. I did read that link you sent me (even though I'm on FC6 and
> >>>>>> not gentoo), but it didn't really help much. I appreciate you sending it
> >>>>>> though. Obviously I'm missing something, but I'm not sure what it is.
> >>>>>>
> >>>>>> Thanks,
> >>>>>> Harry
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>> Are you trying to send your desktop out over the composite output?
> >>>>> Why have the DVI->HDMI cable, then? Also, if you read through the
> >>>>> sample xorg.conf in the link, you'd see that you need to set the
> >>>>> "ConnectedMonitor"to "DFP" or "DFP0" rather than "CRT".
> >>>>>
> >>>>> xorg.conf is xorg.conf - it's (for the most part) distribution-independent.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>> No, I'm trying to send it out via the DVI connector on the GeForce card,
> >>>> which is why I got the DVI->HDMI cable. I only changed it to "Composite
> >>>> because that was what one of the links sent to me in this thread
> >>>> suggested. I changed "ConnectedMonitor" to "DFP0" and "DFP", and I
> >>>> still get a blank screen.
> >>>>
> >>>>
> >>>> Any other ideas?
> >>>> Thanks,
> >>>> Harry
> >>>>
> >>>>
> >>>>
> >>>>
> >>> Do you still have these lines?
> >>> Option "TVStandard" "NTSC-M"
> >>> Option "TVOutFormat" "Composite"
> >>>
> >>> Is the xorg you posted cut-and-pasted? The reason I ask is because
> >>> the "Connected Monitor" section is misspelled.
> >>>
> >>>
> >>>
> >> It was cut-n-pasted (I see the misspelling. Ooops!), but that option
> >> isn't in there any longer. I took it out based on a few other peoples
> >> suggestions. Here's the relevant sections as they exist right now:
> >>
> >> Section "Monitor"
> >> Identifier "Monitor0"
> >> VendorName "Samsung"
> >> HorizSync 30.0 - 50.0
> >> VertRefresh 60.0 - 60.0
> >> EndSection
> >>
> >> Section "ServerFlags"
> >> Option "blank time" "0"
> >> Option "standby time" "0"
> >> Option "suspend time" "0"
> >> Option "off time" "0"
> >> EndSection
> >>
> >> Section "Device"
> >> Identifier "Videocard0"
> >> Driver "nvidia"
> >> VendorName "nVidia"
> >> BoardName "NVIDIA GeForce"
> >> Option "RenderAccel" "1"
> >> Option "NoLogo" "true"
> >> Option "UseEvents" "True"
> >> EndSection
> >>
> >> Section "Screen"
> >> Identifier "Screen0"
> >> Device "Videocard0"
> >> Monitor "Monitor0"
> >> DefaultDepth 24
> >> SubSection "Display"
> >> Viewport 0 0
> >> Depth 24
> >> Modes "1280x720_60" "720x480_60"
> >> EndSubSection
> >> EndSection
> >>
> >> Section "DRI"
> >> Group 0
> >> Mode 0666
> >> EndSection
> >>
> >> Thanks,
> >> Harry
> >>
> >>
> >>
> >
> > You still need to tell Xorg where to send your output, or it will go
> > to the default - CRT VGA.
> >
> > Try this:
> >
> > Section "Device"
> > Identifier "Card0"
> > Driver "nvidia"
> > VendorName "nVidia Corporation"
> > Option "RenderAccel" "true"
> > Option "AllowGLXWithComposite" "true"
> > Option "ConnectedMonitor" "DFP"
> > #Option "NoLogo" "1"
> > EndSection
> >
> > And see if you get any output on your DVI-connected monitor. You may
> > need to replace DFP with DFP0
> >
> >
> OK, that seemed to do it. The screen now shows up, even though it seems
> to be kicked over to the left a little more than it used to, and a few
> things seemed to be cut off the bottom (but I'm not 100% sure about that
> one). All in all, it looks much better. Would that have anything to do
> with the modes in the "Screen" section?
>
> It's not a big deal as it's now working as I hoped. Thanks alot for all
> of your help and assistance.
> Harry
>
>
You can see if the TV sends out valid EDID information. Add this line
to your "Screen" section:
Option "UseEDID" "True"
If that works, you shouldn't have to worry about modelines. If it
doesn't, comment that line out, and starting looking for a good
modeline - check the Gentoo-wiki link I sent earlier for that.
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