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Old 04-09-2007, 12:33 AM   #1
Registered: Apr 2007
Location: texas
Distribution: mandriva 2007.0 / edgy
Posts: 63

Rep: Reputation: 15
MUTE is reversed in software. TVTIME, bt878,

Crazy thing... I put in the ol' tv card and there was no audio. If I hit mute, I can hear audio. If I 'un=mute' it, I can't hear anything. It's reversed!... So what this does, is every time you close the application, I can hear the last tv station's audio. Also, when I'm booting up, the driver gets loaded, and its supposed to be in mute mode, but I can hear audio...

Would this be a detection issue? My card is a Hauppauge bt878 card. I'm completely new at this stuff... so if I did need to select another driver, how would I go about doing that? there doesn't seem to be a place to do this now that it's already been configured the first time through. if not... any ideas?
Old 04-09-2007, 01:09 AM   #2
Bob Jones
Registered: Mar 2007
Posts: 35

Rep: Reputation: 15
Have tried mythtv? Have you gotten sound working with mythtv via your Hauppauge bt878 card?
Old 04-10-2007, 02:13 PM   #3
Registered: Apr 2007
Location: texas
Distribution: mandriva 2007.0 / edgy
Posts: 63

Original Poster
Rep: Reputation: 15
Wow... I've spend many hours last night trying to get myth up and running, but there doesnt seem to be a difinitive approach. Every thread seems to have their own technique... however, it generally encompasses - install myth, install mysql, add mysql database for mythtv, configure mythtv, ...have fun.

the technicals in between is what's spoofing me. I'll search around the net/LQ and try and find a fool proof method, unless someone can recommend a proper method.
Old 04-10-2007, 09:42 PM   #4
Bob Jones
Registered: Mar 2007
Posts: 35

Rep: Reputation: 15
I'm pretty new to this linux stuff too - like it better than windows so far . . . but users pretty much need a brain to get stuff working sometimes. Keep plugging away. The main 'problem' (if you will) is that there are so many distros and hardware configurations - and highly customizable. So, unlike windows, systems are not universal. On the flip side this is a really good thing - we don't have a corporation watching our every move and dictating what we can do with our boxes . . . and we don't have to worry about those nasty windows viruses - haha

So anyway, enough of my ranting, what problems are you having with MythTV?

I've been in the process of installing mythtv for about a month now . . . and I finally had a breakthrough with my sound last night. Everything finally works - including live tv (but the sound still cracks). My next step is to pull and HD signal, but that is another beast all in itself I think.

Unfortunately there isn't very much forum information outside of the wikis to help with Mythtv . . . and a couple threads that I started are heavily viewed - but no responses.

So I'll keep on eye out here and try to help you if you post some info / problems. I am pretty frustrated . . . so maybe we can get a solid thread going to demystify mythtv. But as they say - it will be the blind leading the blind (or maybe in computer speak: a noob leading a noob - haha). Good luck!
Old 04-17-2017, 05:54 PM   #5
John Silvia
LQ Newbie
Registered: Apr 2017
Posts: 1

Rep: Reputation: Disabled
I know it is insane to reply to a thread 10 years old; but this is the most pertinent google result to the problem. After years of intermittently trying to fix this issue myself, I finally found the solution! If I was still searching, someone else might be too.

Some capture cards are wired wrong! The fix is to add the file /etc/modprobe.d/bttv.conf with the following contents:

# TV
alias char-major-81 bttv
options bttv reverse_mute=1

You can see if this fix will work by running
rmmod bttv
modprobe bttv reverse_mute=1


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