[CentOS] Very odd issue w/ a CentOS 6 system

[m.roth at 5-cent.us]

Phil Wyett wrote:
> On Wed, 2016-03-23 at 10:26 -0400, m.roth at 5-cent.us wrote:
<snip>
>> >
>> > What is the make/model of the card?
>> lspci says:
>> Brooktree Corporation Bt878 Audio Capture (rev 11)
>> >
>> > Are you supplying options when loading the bttv module?
>>
>> On and off, I've been googling to find if there's something I can tell
>> it,or the kernel on boot. Currently, I have, in /etc/modprobe.d/bttv:
>> options i2c-algo-bit bit_test=1
>> options bttv gbuffers=16 card=98,98,98,98,98,98,98,98
>> radio=0,0,0,0,0,0,0,0 tuner=4,4,4,4,4,4,4,4 chroma_agc=1 combfilter=2
>> full_luma_range=1 coring=1
>
> The options line 1 is used widely and only worth changing if all else
> fails.
>
> The second options line option of combfilter by docs indicate there is
> no 2 option and is enabled by default, so you can remove that option to
> test.
>
> I would enable two possible compatibility options and see if that helps.
>
> triton1=0/1 - for Triton1 (+others) compatibility.
>
> vsfx=0/1 - yet another chipset bug compatibility bit
>
> The triton1 insmod option sets the EN_TBFX bit in the control register.
> The vsfx insmod option does the same for EN_VSFX bit. If you have
> stability problems you can try if one of these options makes your box
> work solid.
>
> Source: http://xawdecode.sourceforge.net/aideUS/htmlpage/BTTV-param.htm
>

Ok, I've been doing some research, partly refreshing my memory, since we
bought these 2-3 years ago. As you note, above, it *says* it's an iTuner
Spectra8; *however*, when I look at bttv-cards.c, what I see is that *it*
thinks that such a card has *one* video and one audio. In fact, this is a
Bt878, and it has *four* inputs for each, with four chips on the card, one
for each channel. The nearest thing to it *appears* to be a Provideo
PV150, card=98 (which is why I have that card= line in the bttv.conf).

Now that I'm thinking about it, and while googling, I looked for the
provideo 150, and what *should* have been the link took me to one for a
provideo 950, with *16* inputs. Does anyone have opinions on:
  1. should I change the card-, radio=, and tuner= to only have four,
instead of 8, values? I realize that it multiplexes for 8, but....
  2. What is "coring"?

       mark