I am running RELENG_7 from 12 Jan, I noticed that I am only getting
sound on 1 channel. Also opening up "Volume Control" from Gnome and
altering either of "Volume" or "PCM" produces crackles on the non
functioning channel, and kills susbsequent sound output on either channel!
(Just to be sure I tried the speakers out with another machine, and they
work fine - both channels)
I have hw.snd.maxautovchans=2 set in /etc/sysctl.conf - I'm wondering if
that is wrong these days.
$ dmesg|grep -i hda
hdac0: <VIA VT8251/8237A High Definition Audio Controller> mem
0xff5fc000-0xff5fffff irq 17 at device 1.0 on pci2
hdac0: HDA Driver Revision: 20081226_0122
hdac0: [ITHREAD]
hdac0: HDA Codec #0: Analog Devices AD1986A
hdac0: hdac_widget_connection_parse: nid=18 WARNING: zero cnid entnum=4
j=2 index=0 entries=8 found=2 res=0x21002211
pcm0: <HDA Analog Devices AD1986A PCM #0 Analog> at cad 0 nid 1 on hdac0
pcm1: <HDA Analog Devices AD1986A PCM #1 Digital> at cad 0 nid 1 on hdac0
hdac0: <VIA VT8251/8237A High Definition Audio Controller> mem
0xff5fc000-0xff5fffff irq 17 at device 1.0 on pci2
hdac0: HDA Driver Revision: 20081226_0122
hdac0: [ITHREAD]
hdac0: HDA Codec #0: Analog Devices AD1986A
hdac0: hdac_widget_connection_parse: nid=18 WARNING: zero cnid entnum=4
j=2 index=0 entries=8 found=2 res=0x21002211
pcm0: <HDA Analog Devices AD1986A PCM #0 Analog> at cad 0 nid 1 on hdac0
pcm1: <HDA Analog Devices AD1986A PCM #1 Digital> at cad 0 nid 1 on hdac0
hdac0: <VIA VT8251/8237A High Definition Audio Controller> mem
0xff5fc000-0xff5fffff irq 17 at device 1.0 on pci2
hdac0: HDA Driver Revision: 20081226_0122
hdac0: [ITHREAD]
hdac0: HDA Codec #0: Analog Devices AD1986A
hdac0: hdac_widget_connection_parse: nid=18 WARNING: zero cnid entnum=4
j=2 index=0 entries=8 found=2 res=0x21002211
pcm0: <HDA Analog Devices AD1986A PCM #0 Analog> at cad 0 nid 1 on hdac0
pcm1: <HDA Analog Devices AD1986A PCM #1 Digital> at cad 0 nid 1 on hdac0
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