[mythtv-users] optimizing nvidia tv-out for widescreen rear projection tv connected via s-video

Braindead Braindead at diablops.com
Fri May 18 15:36:04 UTC 2007

now that I've been using Myth for a while... starting to wonder if I can get better picture quality, not that it's bad... seems pretty darned nice really.. but one just never knows.

My TV is a 46" sony widescreen rear projection TV, the only connection I have available on my FE is s-video or composite.. (TV has DVI, component..etc..etc..).  I have a feeling that s-video will be the limiting factor for me.  My card is nVidia Corporation NV34 [GeForce FX 5200] (rev a1)

One other thing I've noticed, that perhaps someone can chime in on.  I route most of my video devices through my receiver/amp, for whatever reason the nVidia driver/card will only initialize the tv-out if I'm directly connected to the TV (don't have to be on that particular input, TV doesn't even need to be on) or I have the receiver turned on and that input selected.  I'm guessing that the card/driver does something to attempt to detect the TV, which fails when hooked up to my receiver.

The pertinent xorg.conf  sections, I left out my other monitor config, it's rarely hooked up and I don't think have any effect on things.  I'm of course open to any and all suggestions..  


Section "Monitor"
    Identifier  "TV"
    HorizSync   30-50
    VertRefresh 60
    Option "UseEdidDpi" "FALSE"
    Option "DPI" "100 x 100"

Section "Device"
    Identifier  "nvidia1"
    Driver      "nvidia"
    Option      "NoLogo"        "true"
    VideoRam    128000
    Option      "TVStandard"    "NTSC-M"
    Option      "TVOutFormat"   "SVIDEO'
#    Option      "TVOverScan"    "0.6"
    Option      "TwinView"
    Option      "TwinViewOrientation"   "Clone"
    Option      "ConnectedMonitor"      "TV"
    # Insert Clocks lines here if appropriate

Section "Screen"
    Identifier  "TVOut"
    Device      "nvidia1"
    Monitor     "TV"
    Option      "TVStandard"    "NTSC-M"
    Option      "TVOutFormat"   "SVIDEO"
    DefaultDepth 32
    Subsection "Display"
        Depth       24
        Modes       "1024x768" "800x600" "640x480"
        ViewPort    0 0
    Subsection "Display"
        Depth       32
        Modes       "1024x768" "800x600" "640x480"
        ViewPort    0 0

Since when has the purpose of debian been to appease the interests of
the mass of unskilled consumers?        -- Steve Shorter

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