[lug] TV-out on a NTSC CRT TV

Davide Del Vento davide.del.vento at gmail.com
Mon Dec 27 12:07:04 MST 2010


The machine is running Ubuntu 8.04 and that doesn't show anything on the TV.
I tried a couple of distro I had on live CD and the one those worked (sort
of). It is Ubuntu 10.04 but is not prompting me for any proprietary driver.

I thought that since I was seeing *something* (and I don't care about the
resolution, 320x200 would be ok for me :-) this was something more about the
TV than about the video card. Since it is a very old laptop (at least 5
years, probably 10), I have no idea about what hw is inside, beside the
disk, which I replaced myself. I know is an HP, only because the logo is
very noticeable :-)
Anyway tonight I'll check the make/model of the video section (and I'll
Google possible solutions before bothering you).

Thanks for the advice,
;Dav


On Sun, Dec 26, 2010 at 21:48, John Hernandez <jph at jph.net> wrote:

> 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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