[mythtv-users] Varying volume in Myth

Lee Alkureishi lee_alkureishi at hotmail.com
Sat Oct 11 00:47:31 UTC 2008

Thanks to everyone who made suggestions regarding this problem. As it 
turns out, the audio problems I was experiencing were not limited to 
mythtv. I was getting the same symptoms in VLC, Kaffeine, and with the 
system sounds.

In fact, when I switched to using the OSS drivers, I was getting the 
same problems! I thought that was really weird, so it must be a hardware 
problem. Thinking it might be overheating, I added extra fans, but no 

Then, I realised that the front-panel on my pc case had an audio 
connector. I've never used it, so it never occurred to me before! I 
opened the case, yanked the front-panel (which was connected to the ASUS 
front-panel connector on the mobo), and started the pc. I'm currently 
listening to TV, and it's been about 20 minutes without any sound glitches.

Fingers crossed it stays that way!

Best regards,


Lee Alkureishi wrote:
> Hi,
> I recently installed mythtv on my new computer, and it's running 
> smoother than my old one with HD content. However, I'm having some 
> trouble with the sound.
> The system is:
> Asus P5N-E SLI motherboard
> Intel core2duo E6300
> 3Gb RAM
> Nvidia 7300 GT
> Onboard sound card - the TV speakers are connected to the green 3.5mm 
> jack (3.5mm --> phono cable).
> ATI HDTV Wonder
> Kubuntu 8.04 (all updates) with kde 3.5
> Mythtv installed from repositories.
> When I'm watching TV, the sound volume varies from normal to very 
> quiet and back again. It's can happen suddenly (as if I'd cut the 
> volume by 80%), or gradually (as if I slowly turned down the volume 
> knob). When it comes back up to normal, it's always gradual.
> I thought that it was limited to watching TV, but last night while 
> watching a video file the volume remained extremely low throughout the 
> hour-long video. I had to turn the TV right up so I could hear it!
> I've tried disabling myth's internal mixer, but it doesn't seem to 
> have any effect. The audio device is set to "ALSA:default". If I 
> change it to anything else in mythtv's setup, I get no sound at all.
> I hope someone here can give me a clue how to sort this out... The box 
> is otherwise working great!
> Thanks,
> Lee

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