[mythtv-users] Mute doesn't work

[Greg Oliver]

On Sat, Nov 13, 2010 at 11:19 PM, John H <arizonamythtv at gmail.com> wrote:
> I've been having a problem with the mute working as nothing happens
> when I hit the mute button. I checked the log file and it says mute
> has been activated. I'm running my audio through ladspa to normalize
> the volume so I'm not sure if this is causing an issue. It was working
> before but it went bad maybe around the time I bought a new
> motherboard. I'm using analog audio off the MB.
>
> cat /proc/asound/cards
>
>  0 [SB             ]: HDA-Intel - HDA ATI SB
>                      HDA ATI SB at 0xf7ff4000 irq 16
>
> lspci -vvv
>
> 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
>        Subsystem: Foxconn International, Inc. Device 0e11
>        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B- DisINTx-
>        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>        Latency: 64, Cache Line Size: 64 bytes
>        Interrupt: pin ? routed to IRQ 16
>        Region 0: Memory at f7ff4000 (64-bit, non-prefetchable) [size=16K]
>        Capabilities: [50] Power Management version 2
>                Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
> PME(D0+,D1-,D2-,D3hot+,D3cold+)
>                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
>        Kernel driver in use: HDA Intel
>        Kernel modules: snd-hda-intel
>
> Any ideas?

I do not control volume with the PC, however you are the second on the
list that says mute is broken with ladspa compression in use.  The
only workaround I could think of for you is to map the mute key in
lircrc to a script that runs "amixer set <cardid> <mute/unmute>".  Of
course, you would need to keep track of wether the card is muted or
unmuted so it preforms the correct action.

-Greg