Re: MIRO BT848 video displays in the wrong place.

David Woodhouse (Dave@imladris.demon.co.uk)
Mon, 13 Apr 1998 04:16:09 +0200


> > Using a Matrox Millennium II in 32-bpp mode, the window displayed by the
> > bttv driver is roughly 256 pixels left of where it should be.
>
> Which X server are you using ?

XFree86 Version 3.3.2 / X Window System
(protocol Version 11, revision 0, vendor release 6300)
Release Date: March 2 1998
If the server is older than 6-12 months, or if your card is newer
than the above date, look for a newer version before reporting
problems. (see http://www.XFree86.Org/FAQ)
Operating System: Linux 2.1.89 i586 [ELF]
Configured drivers:
SVGA: server for SVGA graphics adaptors (Patchlevel 0):

>
> In theory we ask the Xf86DGA extension to tell us what the display setup
> is so Im suprised the Millenium II has a problem. If its X lying we need to
> fix X, if its something deeply weird about the card then it needs
> addressing elsewhere
>

It works properly in 24-bit mode, so I don't think it's X lying.

Currently, I've hacked xawtv to ask the bttv driver to put the overlay 256
pixels to the right of the position it really wants. Between them, they manage
to get it right unless the window's at the RHS of the screen, in which case
xawtv asks the driver to place the image off-screen, to which it quite
reasonably seems to object.

> > I haven't got sound to work at all yet - I'll look into that further before
> > I whinge, though. How do I change the IF for the sound carrier between 5.5
> > and 6MHz, or is that hard-wired?
>
> That depends if your card has an MSP3400 on it or not

It doesn't look like it - there's nothing but the tuner on the I2C bus - at
0xc0 and 0xc2, and the only chip of interest I can see on the board is a BT848
- the rest all start 74... and look like glue logic.

The tuner module seems to have a 5.5Mhz audio IF, if I understand the
hieroglyphics on it correctly. I can't get any noise out of it at all, though.
Isn't there a demux on the BT848 that's used for switching audio channels to
the external connector? Is that supposed to be supported for the Miro PCTV, or
should I just hard-wire the audio output from the demodulator box to somewhere
useful?

---- ---- ----
David Woodhouse, Robinson College, CB3 9AN, England. (+44) 0976 658355
Dave@imladris.demon.co.uk http://www.imladris.demon.co.uk
finger pgp@dwmw2.robinson.cam.ac.uk for PGP key.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu