[mythtv-users] PVR-350 and PVR-150 - Sound Problem

[Nick]

On 12/05/06, James Kaufman <jmk at kaufman.eden-prairie.mn.us> wrote:
> On Fri, May 12, 2006 at 02:35:26AM +0100, Nick wrote:
> > On 11/05/06, James Kaufman <jmk at kaufman.eden-prairie.mn.us> wrote:
> > > I bought a new-fangled PVR-150 from CompUSA a couple of days ago
> > > (with the $40 instant saving + rebate offer) and popped that in. I
> > > also updated some of the software on the myth box based on MythDora's
> > > changelog for version 2.3. This upgraded the kernel to 2.6.16, and
> > > ivtv to 0.6.1.
> > >
> > > The new PVR-150 is detected as card 0 and the original 350 is now card
> > > 1. The new 150 is not auto-detected, so I marked it as type 50. The
> > > good news is that after upgrading the software and using the IR port
> > > on the new 150, the remote control works. (It never worked using the
> > > PVR-350.) HOWEVER, I get video and audio on the new 150 card. I only
> > > get video on the 350.
> >
> > First thing to do is check your syslog for the ivtv output when the
> > ivtv modules are loaded to make sure there are no obvious issues with
> > card detection (could be PVR-350 tuner). The new 2.6.16 kernel (I
> > think) no longer wants the ivtv-msp3400 alias in your modprobe.conf as
> > the module is now in the kernel, so this could be one possible cause.
> >
>
> Brilliant.
>
> I have two sets of drivers in the /lib/modules/2.6.16-1.2096_FC4
> directory. The standard set that comes with the kernel and a set under
> an updates directory that came from
> video4linux-kmdl-2.6.16-1.2096_FC4-20060410-70.rhfc4.at. That meant
> two version of msp3400.ko and the one from the updates directory was
> getting loaded. I renamed the file, ran depmod, and now I have sound
> with the PVR-350.
>
> Does the same rule apply to the sound driver for the PVR-150? I have
> two copies of the cx25840 driver. I get sound from the 150, but it is
> significantly quieter than from the 350. (I've checked the levels
> using ivtvctl and both cards are around 95%)

The audio volume differences between different PVR-xx0 cards has been
discussed on the ivtv lists, so I'm pretty confident it's not the same
issue - only the msp3400 module has made it into the kernel, not the
rest of ivtv as I understand it - although it's quite possible that
some of the other supporting modules are there as well (the msp3400
issue was the one I'd seen special mention). Once ivtv makes it in it
will clean things up a lot.

Nick