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PostPosted: Sat Apr 09, 2005 7:14 am 
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Joined: Sun Oct 17, 2004 1:08 pm
Posts: 28
Location: Raleigh, NC
I was setting up a system at the house and when I installed a new client, it got 0.17 (via apt-get), so I upgraded the server without realizing it was brand new.

Now I've got a persisent hum under on any audio played over the network. When you turn the volume up, the hum comes up as well. More like a rumbling. :( I don't recall hearing it before but I wasn't doing much over the network before either. I'm hearing this on two different clients (a desktop and a laptop) so I don't think it's the client soundcards. I've swapped out the tuner card (it's a cheap bttv card w/a 848 chip in it. The audio gets routed through the soundcard via a patch cable for this card.

When I am watching TV, etc on the mythbackend box, the audio sounds fine. I've tried several different sound cards in the server as well. Now I'm back to the cheap on-board i810 intel sound (on an ECS 7S5a board). It's got a 1.2 gzh AMD Thunderbird, 512 megs ram, 200 gigs of hard drive... (anything else you need to know?)

Anyone else using 0.17 or has anyone heard of anything similar? I'm about to just uninstall on the server and roll back to 0.16 if no-one has any ideas.

TIA

btw, is the right forum for this post?


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PostPosted: Sat Apr 09, 2005 9:25 am 
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Joined: Mon Oct 06, 2003 10:38 am
Posts: 4978
Location: Nashville, TN
Well anyone running knoppmyth R5A10 or R5A12 is using 0.17 It's been out for a while now.

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 Post subject: Oh well...
PostPosted: Sat Apr 09, 2005 9:39 am 
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Joined: Sun Oct 17, 2004 1:08 pm
Posts: 28
Location: Raleigh, NC
Gotcha... thanks. I guess I'll just downgrade the system and see what that does for me. I was hoping to get lucky and have someone say that's caused by X, it's easy to fix. :)

The upgrade was trivial... any ideas as to whether or not database schemas, etc were upgraded in non-backwards-compatible fashion?


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PostPosted: Sat Apr 09, 2005 9:44 am 
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Joined: Thu Apr 01, 2004 10:44 am
Posts: 677
Location: WA
Quote:
etc were upgraded in non-backwards-compatible fashion



no they werent... sorry It may workstill however, but you might have random weirdness as well i wouldnt


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PostPosted: Sat Apr 09, 2005 9:44 am 
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Joined: Mon Oct 06, 2003 10:38 am
Posts: 4978
Location: Nashville, TN
the databases are definitely upgraded, not sure what will happen when trying to downgrade. Just cause I didn't answer your question about the audio doesn't mean someone else won't I don't do any (none at all) frontend backend stuff, so I have zero experience in the area you are asking about.

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 Post subject:
PostPosted: Sat Apr 09, 2005 9:44 am 
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Joined: Thu Mar 25, 2004 11:00 am
Posts: 9551
Location: Arlington, MA
Look around a bit, other folks seem to have done the downgrade successfully, so I'd guess there aren't any major obstacles...


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 Post subject: Issue resolved
PostPosted: Sun Apr 10, 2005 1:41 pm 
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Joined: Sun Oct 17, 2004 1:08 pm
Posts: 28
Location: Raleigh, NC
Hi all,

Thanks for the input, the issue has been fixed. Short version? The KDE sound system (arts) was causing the noise.

Long version: Being the person that I am, I wiped the box and re-installed Kubuntu linux, then re-installed 0.17. After hearing that lots of folks were using with no problems, I decided to forge ahead.

Tried using a new SoundBlaster Audigy for the sound card, but couldn't get any signal from /dev/dsp, although you could hear the audio when the tuner was active. I tried w/Kmix and alsa_mixer to get the line in to route properly but nothing worked, so I went back to the onboard sound with the motherboard and that's working fine.

I also tried messing around w/various audiomux settings, wasting much time, thinking that the hum was caused by me not using the card properly. This card is a very cheap (and very undocumented) card (I paid $10 for it). Turns out it was working fine though.

Finally found a web reference to the KDE sound system causing all sorts of crazy problems, so I turned it off. Go to the Control Center, select the Sound System entry and click the "Start the Sound System" checkbox. After that it all worked fine.


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