[mythtv] green tint on bt8x8 caused by automatic 'adjust' filter

Damian Hodgkiss mythtv at mian.net.au
Thu Aug 19 19:46:23 EDT 2004

I've seen green tint for along time (atleast 3 months?) on live-tv on
occasions when I switch between composite in and DVB-T on the same card,
which as the person pasted very below also causes the card to reset
sometimes, I can always
fix it by exiting out of and back in to live-tv, or changing channels and
then back.. both of which cause the recorder to be re-started, so I've
always assumed it's something todo with the adjust-filter not
applying/failing for some reason.

----- Original Message ----- 
From: "Torbjörn Jansson" <torbjorn.jansson at mbox200.swipnet.se>
To: "'Andrew Mahone'" <andrew.mahone at gmail.com>; "'Development of mythtv'"
<mythtv-dev at mythtv.org>
Sent: Friday, August 20, 2004 1:34 AM
Subject: RE: [mythtv] green tint on bt8x8 caused by automatic 'adjust'

> mythtv-dev-bounces at mythtv.org <> wrote:
> > Can you try to figure out when this started happening, (ie, when did
> > you check it out from CVS, have you been playing with cflags, etc)?
> > My last build from CVS was 6/30, and there is no visible tint in
> > recordings since then.  I would also suggest you try disabling the MMX
> > code (simple to do, look at the filter init function).  It may be that
> > something about your compiler or cflags has broken the MMX code, which
> > is probably a bit more fragile than the LUT-based C version.
> >
> > On Thu, 19 Aug 2004 05:43:37 +0100, Andy McMullan
> > <andy at andymcm.com> wrote:
> >> I've been having a problem where sometimes recordings have a green
> >> tint to them. Others have reported the same problem recently (e.g.
> >> Chris Petersen)
> >>
> >> I've tracked down the problem to the automatic use of the 'adjust'
> >> filter for bt8x8 cards in NuppelVideoRecorder.cpp. If I disable
> >> this, the problem goes away.
> >>
> >> I don't know whether the problem is with the adjust filter itself, or
> >> the code that invokes it in NuppelVideoRecorder.cpp, but I'd guess
> >> the former.
> >>
> >> I suggest that until the problem is resolved the automatic use of
> >> the filter is retracted.
> >>
> >> My system details are: Fedora Core 1, Athlon 1700+, Hauppauge bt878
> >> (composite input, PAL).
> >>
> >> Andy Mc
> >>
> I also get green colored recordings, but i'm also seeing messages like:
> kernel: bttv0: SCERR @ 077c101c,bits: HSYNC OFLOW SCERR*
> last message repeated 12 times
> kernel: bttv0: timeout: drop=0 irq=1919422/1919422, risc=077c101c, bits:
> kernel: bttv0: reset, reinitialize
> kernel: bttv0: PLL: 28636363 => 35468950 . Ok
> and:
> kernel: bttv0: SCERR @ 077c101c,bits: HSYNC OFLOW FBUS SCERR*
> kernel: bttv0: SCERR @ 077c101c,bits: HSYNC OFLOW FBUS SCERR*
> >From the kernel log.
> Sometimes the recordings gets recorded all black, sometimes it's green
> colored.
> I've never figured out why it happends, but i'm suspecting my crappy
> mainboard, a crapy via kt266a chipset, the one with pci hardware problems.
> I've had theese problems more or less all the time, when i used linux 2.4
> kernel it usualy lockedup, requiering a reset, instead of recording in
> black.
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