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Failed BT878 Causing sound to block ?

Dear Friends,

>I have a Pinnacle PCTV card (PAL-M), and use a Debian Testing
>distribution.
>
>I was previously using kernel 2.6.10 and everything was working without
> any problem. I recently upgraded to kernel 2.6.16, and after the
>upgrade some problems started to appear. The first thing I noticed was
>that ALSA stopped working and I didn't have any kind of sound anymore.
>After trying to reinstall ALSA and picking up the most recent drivers,
>I decided to investigate the reason for this misbehavior. There seems
>that something was blocking the sound hardware. After making a trace of
> the kernel messages, I noticed that it was just after the kernel
>failed in loading the BT878 device that I was able to hear a "click" in
> the speakers and after that the sound system was dead. The message I
>got was this one:
>
>
>----------------------------------------------------------------------
>bt878: AUDIO driver version 0.0.0 loaded
>bt878: Bt878 AUDIO function found (0).
>
>ACPI: PCI Interrupt 0000:02:04.1[A] -> Link [LNKC] -> GSI 10 (level,
> low) -> IRQ 10
>
>bt878_probe: card id=[0x1211bd], Unknown card.
>Exiting..
>ACPI: PCI interrupt for device 0000:02:04.1 disabled
>bt878: probe of 0000:02:04.1 failed with error -22
>----------------------------------------------------------------------
>After that, even though the sound driver loads ok:
>----------------------------
>Intel 810 + AC97 Audio, version 1.01, 18:16:54 Apr 15 2006
>-----------------------------
>
>I don't have any kind of access anymore to the whole sound system. I
>have the impression that after failing, the module may be disabling
>something related to the sound card that avoids ALSA to use it (the
>ACPI message saying that the interrupt for the device is disabled is
>making me suspect of that). The sound driver loads after the failing
>BT878. Could you give any hint if this is some misconfiguration I am
>doing in the module parameters (that possibly changed from 2.6.10 to
>2.6.16) or if this is a bug in the newer bt878 code ? If I boot using
>2.6.10 the sound works again, so this is not caused by a problem in my
>recently upgraded ALSA files. There is also a chance that this is not
>caused by the failed BT878, but this is now my main hypothesis. I will
>appreciate any kind of comment regarding this, as I really would like
>to use a newer kernel. Ah ... by the way, ... I am using the smp
>version of 2.6.16 (the Debian image, I didn't compiled it by my own),
>because I have a Pentium IV HT processor, and I am using smp to make it
> work under multi-processing (the HT allows Linux to work as if it has
>2 processors instead just one, due to a trick in memory access). Maybe
>the multi-processing has something to do with this too.
>
>Many thanks,
>Ricardo


Hello,

I am wondering if you have gotten any further with this issue? I have a Pinnacle PCTV Pro / EMPTYV (51013170-1.4A) (NTSC version) that is exhibiting the same symptoms, and getting the same messages. I am running a Debian Sarge system, using a 2.6.16-2-k7 kernel from www.backports.org. So, you problem is not specific to the SMP version. I do not have a 2.6.10 kernel available to test and see if the card works in that version. But, perhaps I will look at the module differences and see what can be seen.


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