[mythtv-users] error in mythtv setup

[Douglas Wagner]

Couple things you can do.  First, if you're looking to check out the
permissions problems (the easier of the two) run Myth as root.  Just log in
as root and then run the myth setup and see if you get the same behavior, if
you don't (i'm guessing you will) then it's a permissions issue you need to
solve, take a deep breath and sigh with relief that it's not the second of
the problems.

However, i'm going to guess (with as little experience as I have with this)
that the nVidia card's tuner isn't linux supported.  As the message before
me mentioned, check your /var/log/messages or dmesg to make sure that the
tuner was recognized.  On my system I get the following:

Apr 29 02:04:58 ghost kernel: Linux video capture interface: v1.00
Apr 29 02:04:58 ghost kernel: cx2388x dvb driver version 0.0.5 loaded
Apr 29 02:04:58 ghost kernel: CORE cx88[0]: subsystem: 7063:3000, board:
pcHDTV
HD3000 HDTV [card",autodetected]
Apr 29 02:04:58 ghost kernel: TV tuner 52 at 0x1fe, Radio tuner -1 at 0x1fe
Apr 29 02:04:59 ghost kernel: cx2388x v4l2 driver version 0.0.5 loaded
Apr 29 02:04:59 ghost kernel: ACPI: PCI Interrupt 0000:03:05.2[A] -> GSI 17
(lev
el, low) -> IRQ 18
Apr 29 02:04:59 ghost kernel: cx88[0]/2: found at 0000:03:05.2, rev: 5, irq:
18,
 latency: 32, mmio: 0xf6000000
Apr 29 02:04:59 ghost kernel: cx88[0]/2: cx2388x based dvb card
Apr 29 02:04:59 ghost kernel: DVB: registering new adapter (cx88[0]).
Apr 29 02:05:00 ghost kernel: DVB: registering frontend 0 (Oren OR51132
VSB/QAM
Frontend)...
Apr 29 02:05:00 ghost kernel: ACPI: PCI Interrupt 0000:03:05.0[A] -> GSI 17
(lev
el, low) -> IRQ 18
Apr 29 02:05:00 ghost kernel: cx88[0]/0: found at 0000:03:05.0, rev: 5, irq:
18,
 latency: 32, mmio: 0xf5000000
Apr 29 02:05:00 ghost kernel: cx88_blackbird: Unknown symbol cx88_do_ioctl
Apr 29 02:05:00 ghost kernel: tuner 1-0061: chip found @ 0xc2 (cx88[0])
Apr 29 02:05:00 ghost kernel: tuner 1-0061: type set to 52 (Thomson DTT 7610
(AT
SC/NTSC))
Apr 29 02:05:00 ghost kernel: tda9887 1-0043: chip found @ 0x86 (cx88[0])
Apr 29 02:05:00 ghost kernel: cx88[0]/0: registered device video0 [v4l2]
Apr 29 02:05:00 ghost kernel: cx88[0]/0: registered device vbi0
Apr 29 02:05:00 ghost kernel: cx88[0]/0: registered device radio0

Which gives me a /dev/dvb/*, /dev/video* and /dev/radio* devices in the /dev
directory.

If you have a /dev/video* in /dev then something is being picked up (this is
good) however i'm guessing either you have no /dev/video* (or other) or
while the kernel thinks you have a tuner it has no way to control it and
thus accessing /dev/video* causes issues.

Now, here's where I really start throwing out the WAGs:

/dev/video* I believe is created when your tuner card is recognized by the
V4L (Video4Linux) drivers.  You can search to see if your card is on the
list as supported by V4L.  The /dev/dvb/* devices are created if your card
is recognized and controllable via the built in DVB kernel support (cards
such as the pcHDTV3000 are this way).  Other than V4L and DVB i'm not sure
what other support linux has for tuner cards...someone will have to add to
the list (i'm very unfmailiar with ivtv and am unsure if this is a package
supporting another set of cards or if this is some other thing that plugs in
in some way to this whole setup...as I said, i'm still very new to all
this).

Bottom line is your card's tuner is likely at this point to not be supported
by Linux, it is, after all, a fairly new card.

--Douglas Wagner

On 4/29/06, Joe Votour <joevph at yahoo.com> wrote:
>
>
>
> --- Allison Roth <teleute at shaw.ca> wrote:
>
> > Hi Joe;
> >
> > Thanks for the quick response.  I'm pretty sure I'm
> > okay on the driver
> > front - if I go into xorg.conf it lists my card
> > properly in there...
> >
> > As for permissions, I've put the mythtv user in the
> > card's group and
> > nothing.  Tried running as root and still nothing.
> > Is there anything
> > else I can check?  Thank you.
> >
> > -Allison
> >
>
> <snip>
>
> You need a driver for the capture card also (the VIVO
> part of the nVidia card).  This is independant of xorg
> (xorg only gives you the video out).
>
> As far as I'm aware, no such driver exists.  Do you
> have a "/dev/video0" device?  Is there anything in
> your system bootup logs (use dmesg) that indicates
> that the card was detected and a driver installed for
> it?
>
> -- Joe
>
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