On Thu, May 08, 2014 at 07:00:19PM +0000, Matthew Gillespie wrote: > Fred Smith <fredex at ...> writes: > > > > > Hi all! > > > > Using C6 on an Asus M5A99X EVO R2.0 motherboard with AMD six core FX6300. > > That board uses Realtek ALC892 audio chipset. > > > > For the first time since I got that motherboard I tried plugging in > > headphones to the front panel speaker output. I was somewhat displeased > > to note that the speakers don't mute when that happens. > > > > I recall seeing info on that in Fedora, but not Centos, and haven't > > so far scared up how to troubleshoot it. > > > > I can MANUALLY change the setting in sound preferences, which offers > > only two choices: "Analog Output" and "Analog Headphones". > > > > Suggestions will be welcomed! > > > > Fred > > Might have a look at amixer and see if you have an option you can alter > similar to: > > Simple mixer control 'Auto-Mute Mode',0 > Capabilities: enum > Items: 'Disabled' 'Speaker Only' 'Line Out+Speaker' > Item0: 'Line Out+Speaker' > > And see if you can set it ala: > > /usr/bin/amixer -c0 set "Auto-Mute Mode" "Line Out+Speaker" > > -Matthew Gillespie Matthew: thanks for the reply. so far, that isn't working, and I'm still perusing the man page. here's what I get: $ /usr/bin/amixer -c0 set "Auto-Mute Mode" "Line Out+Speaker" amixer: Unable to find simple control 'Auto-Mute Mode',0 I also note that when I do amixer -c0 controls, the resulting list does NOT contain either "Auto-Mute Mode" or "Line Out+Speaker" as permissible controls: amixer -c0 controls numid=42,iface=CARD,name='Front Headphone Phantom Jack' numid=35,iface=CARD,name='Front Mic Phantom Jack' numid=37,iface=CARD,name='Line Jack' numid=40,iface=CARD,name='Line Out CLFE Jack' numid=38,iface=CARD,name='Line Out Front Jack' numid=41,iface=CARD,name='Line Out Side Jack' numid=39,iface=CARD,name='Line Out Surround Jack' numid=36,iface=CARD,name='Rear Mic Jack' numid=43,iface=CARD,name='SPDIF Phantom Jack' numid=44,iface=CARD,name='SPDIF Phantom Jack',index=1 numid=34,iface=MIXER,name='Master Playback Switch' numid=33,iface=MIXER,name='Master Playback Volume' numid=12,iface=MIXER,name='Headphone Playback Switch' numid=11,iface=MIXER,name='Headphone Playback Volume' numid=45,iface=MIXER,name='PCM Playback Volume' numid=25,iface=MIXER,name='Front Mic Boost Volume' numid=14,iface=MIXER,name='Front Mic Playback Switch' numid=13,iface=MIXER,name='Front Mic Playback Volume' numid=2,iface=MIXER,name='Front Playback Switch' numid=1,iface=MIXER,name='Front Playback Volume' numid=4,iface=MIXER,name='Surround Playback Switch' numid=3,iface=MIXER,name='Surround Playback Volume' numid=7,iface=MIXER,name='Center Playback Switch' numid=5,iface=MIXER,name='Center Playback Volume' numid=8,iface=MIXER,name='LFE Playback Switch' numid=6,iface=MIXER,name='LFE Playback Volume' numid=27,iface=MIXER,name='Line Boost Volume' numid=18,iface=MIXER,name='Line Playback Switch' numid=17,iface=MIXER,name='Line Playback Volume' numid=22,iface=MIXER,name='Capture Switch' numid=24,iface=MIXER,name='Capture Switch',index=1 numid=21,iface=MIXER,name='Capture Volume' numid=23,iface=MIXER,name='Capture Volume',index=1 numid=32,iface=MIXER,name='IEC958 Default PCM Playback Switch' numid=28,iface=MIXER,name='IEC958 Playback Con Mask' numid=29,iface=MIXER,name='IEC958 Playback Pro Mask' numid=30,iface=MIXER,name='IEC958 Playback Default' numid=31,iface=MIXER,name='IEC958 Playback Switch' numid=19,iface=MIXER,name='Input Source' numid=20,iface=MIXER,name='Input Source',index=1 numid=26,iface=MIXER,name='Rear Mic Boost Volume' numid=16,iface=MIXER,name='Rear Mic Playback Switch' numid=15,iface=MIXER,name='Rear Mic Playback Volume' numid=10,iface=MIXER,name='Side Playback Switch' numid=9,iface=MIXER,name='Side Playback Volume' -- ------------------------------------------------------------------------------- .---- Fred Smith / ( /__ ,__. __ __ / __ : / / / / /__) / / /__) .+' Home: fredex at fcshome.stoneham.ma.us / / (__ (___ (__(_ (___ / :__ 781-438-5471 -------------------------------- Jude 1:24,25 ---------------------------------