[mythtv-users] Audio, but No Volume Control

Ian Newby ian at codex.org.uk
Wed Dec 13 15:22:34 UTC 2006

Tom Corcoran wrote:
> Hi
> I have spent some time configuring my new MythTV box and am nearly ready 
> to start enjoying it bar one problem, I cannot control the volume!  The 
> volume is set at 'midrange' and when I turn up or down the volume via 
> hotkeys it makes no difference whatsoever.
> My build is based on a mobo with on board AC97 sound chip (Intel), a PVR 
> 500 MCE, a PCI nVidia FX5200 which hosts KDE based FC4 and MythTV .20. 
> All functions of Myth seem to work OK bar the Volume control in Live TV, 
> I am not sure about the volume in MP3 playback I will confirm.
> I had a loop back cable from audio out on the PVR500 to Line in on the 
> Sound card but have found this seems unnecessary as when it is removed 
> audio is still present.  I originally had a bt778 capture card installed 
> and have since upgraded it to the 500 so i am unsure if this is related 
> to the problem.
> When I run dmesg I see the following;
> tveeprom 1-0050: audio processor is CX25843 (idx 37)
> ivtv0: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB
> total)
> tveeprom 2-0050: audio processor is CX25843 (idx 37)
> ivtv1: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB
> Any help would be greatly appreciated, Is any further data needed to 
> troubleshoot further?
> Many thanks for your time.
> TomC
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Hi Tom,
    I seem to be having similar problems to you. Just a thought, what
distribution are you using?
I'm using Ubuntu Edgy with the standard supplied Myth packages. Are you
using the same?

If so it may be that building from source could be the answer.

Ian Newby

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