Mailing List Archive: MythTV: Dev

[REGRESSION] Pixelview PV-BT878P+

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jayc at CLEMSON

May 27, 2004, 11:46 PM

Post #1 of 3 (1837 views)
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[REGRESSION] Pixelview PV-BT878P+

This is a regression for a bug that was fixed in versions .11 - .14 but
has no shown its ugly head in .15

With the Prolink Pixelview PV-BT878P+, the sound will not begin until
the channel is changed. This must be done each time live tv is
watched. In addition, no recordings will be recorded with sound.

Please see this post by the person who fixed the bug originally. Oddly
enough, this bug also occurs in kernel 2.6 with version .14, incase that
is of any interest too.

http://mythtv.org/pipermail/mythtv-users/2003-August/010952.html

ijr at po

May 28, 2004, 12:05 AM

Post #2 of 3 (1765 views)
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Re: [REGRESSION] Pixelview PV-BT878P+ [In reply to]

On Friday 28 May 2004 02:46 am, Jay Camp wrote:
> This is a regression for a bug that was fixed in versions .11 - .14 but
> has no shown its ugly head in .15
>
> With the Prolink Pixelview PV-BT878P+, the sound will not begin until
> the channel is changed. This must be done each time live tv is
> watched. In addition, no recordings will be recorded with sound.
>
> Please see this post by the person who fixed the bug originally. Oddly
> enough, this bug also occurs in kernel 2.6 with version .14, incase that
> is of any interest too.

It's not a bug in mythtv. No parameters of the video_channel struct are being
modified in that function, so there is no reason to set call that ioctl.
Additionally, calling VIDIOCSCHAN there causes audio problems on other, more
common, bttv cards.

If setting the capture volume on your card mutes it, I'd say the driver is
broken and needs fixed, not mythtv.

Isaac
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mdz at debian

May 31, 2004, 3:35 PM

Post #3 of 3 (1767 views)
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Re: [REGRESSION] Pixelview PV-BT878P+ [In reply to]

On Fri, May 28, 2004 at 02:46:25AM -0400, Jay Camp wrote:

> This is a regression for a bug that was fixed in versions .11 - .14 but
> has no shown its ugly head in .15
>
> With the Prolink Pixelview PV-BT878P+, the sound will not begin until
> the channel is changed. This must be done each time live tv is
> watched. In addition, no recordings will be recorded with sound.
>
> Please see this post by the person who fixed the bug originally. Oddly
> enough, this bug also occurs in kernel 2.6 with version .14, incase that
> is of any interest too.
>
> http://mythtv.org/pipermail/mythtv-users/2003-August/010952.html

That patch is not a fix for the bug, but a workaround, because the bug would
seem to be in the bttv driver, or even in the hardware/firmware.

It seems to have been commented out in revision 1.161, though I don't know
why, and the lack of any mention in the log message may imply that it was
unintentional.

--
- mdz

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