[lug] TV-out on a NTSC CRT TV

John Hernandez jph at jph.net
Sun Dec 26 21:48:39 MST 2010

Hi Davide, it would help to know more specifics about the video
hardware (lspci output) and the Linux distro/version.

This may be dated information, but I think the proprietary driver was
the fastest (perhaps only?) path to TV-out success with nVidia
systems.  I don't recall ever doing that with older ATI or Intel
hardware, but I bet someone here did...

On Sun, Dec 26, 2010 at 11:23 AM, Davide Del Vento
<davide.del.vento at gmail.com> wrote:
> Hi,
> I'm trying to have a TV (not-too-old, but CRT) working with the TV-out
> of my media laptop (a very old HP bought in Italy). Purpose: show the
> kids some cartoons on a larger screen.
> I'm struggling to have it working: I do see the image, but it is never
> good enough. The autodetected default call the "monitor" unknown, and
> use an non-interlaced mode which shows double images, partially
> overlapping in vertical, and some flickering.
> I tried these:
> http://www.arachnoid.com/modelines/
> http://www.mythtv.org/wiki/Modeline_Database#NTSC525_itu-r.2Fbt:_470_601_656
> http://smackmini.dax.nu/tv-out.html (I know, this is PAL)
> without any success, besides understanding what follows:
> 1) I figured out that using an interlaced mode, stops the flicker and
> completely separates the images, so I can see two images (squeezed in
> the vertical direction), one on top of the other - with a relatively
> large black area in between (and probably part of the images out of
> the screen). From here, I tried to play with the other numbers, to see
> if I could move one image out of the screen and enlarge the other one,
> but...
> 2) the other numbers of the modelines, don't seem to have any
> noticeable effect, maybe the TV is "autocorrecting" whatever it is
> receiving to what it thinks is the right way?
> Any suggestion on what to do?
> Thanks,
> Davide
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