Hi, I have a ICH8M + AD1986A machine. In 6 channel modes, if adjust the volumes when playing 2-channel or4-channel music, codec will be muted and all widget's Amp-Out vals willbe reset. If you play 2-channel files in 6 channel modes,there is noisein the jacks. By doing experiments, I found that the 6-channel bug was caused bysharing channels. If play 2-channel audio file,the rest channels will share channels withthe first 2-channel. The HDA spec doesn’t define the exact behavior under such circumstances. Majority of the codec chips support sharing channel, but seem thatAD1986A doesn’t support. I wrote a patch and tested it in my hardware,now it works well. diff -Nur a/alsa-driver-1.0.15/alsa-kernel/pci/hda/hda_codec.cb/alsa-driver-1.0.15/alsa-kernel/pci/hda/hda_codec.c--- a/alsa-driver-1.0.15/alsa-kernel/pci/hda/hda_codec.c 2007-10-2510:03:29.000000000 -0400+++ b/alsa-driver-1.0.15/alsa-kernel/pci/hda/hda_codec.c 2007-10-2510:02:46.000000000 -0400@@ -2506,7 +2506,8 @@ if (chs >= (i + 1) * 2) /* independent out */ snd_hda_codec_setup_stream(codec, nids[i], stream_tag, i * 2, format);- else /* copy front */+ else if (codec->vendor_id != 0x11d41986)+ /* copy front if it is NOT AD1986A*/ snd_hda_codec_setup_stream(codec, nids[i], stream_tag, 0, format); } In alsa bugzilla and maillist, I found a lot of issues about AD1986A6-channel .Anybody know the detail about AD1986A codec chip and give anycomments? Here is a old description of the issue. >> Hi,>> I have a ICH8M + AD1986A machine and run alsa-driver-1.0.15rc.>> I found that :> In 6 channel mode,if adjust the front or pcm volume when playingmusic,> all channel will be muted,but if adjust the volume alone(don't play> music at the same time),every thing is ok.> I use printk to display the verb in the azx_send_cmd(),> when adjusting the volume in either case, there are just two verb> (0x300) sent to the nid(0x1b) [correct action].> But in the first case, the dac widget amp-out vals are all affected.>>> Some other interesting thing,> If i adjust the Sur or CLFE volume when playing music, the printk show> that correct verb is sent, but the codec status don't change.> If I adjust them alone,every thing is ok._______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel
