At Thu, 26 Jun 2008 14:43:30 +0800, <Ashwin.Chandra@xxxxxxxxx> wrote: > > Hello, > I have found an issue with the mixer devices. I had been controlling > only one elem, "LineOut", but there is another elem named "iSpeaker" > which is the one that shows only left speaker active in alsamixer. I am > not sure why I would need to control both of them. I would expect > "Lineout" to be the master control. But anyway I can fix the problem in > my application by un setting mute on the right channel at the beginning > of the application. Good to hear that you found out the culprit. > Do you have any idea about this though? (or have seen this before)? There have been similar bug reports, but your finding isn't unknown (and thus important). Could you run alsa-info.sh with --no-upload option for both working and non-working cases, and attach the generated files? The script is found at http://www.alsa-project.org/alsa-info.sh thanks, Takashi > > -----Original Message----- > From: Takashi Iwai [mailto:tiwai@xxxxxxx] > Sent: Wednesday, June 25, 2008 11:26 PM > To: Ashwin Chandra > Cc: alsa-devel@xxxxxxxxxxxxxxxx > Subject: Re: Alsa Issue - Sound playback starts on left > speaker only > > At Thu, 26 Jun 2008 03:28:42 +0800, > <Ashwin.Chandra@xxxxxxxxx> wrote: > > > > Hi Takashi, > > Actually now I am noticing the problem (left speaker only) with > > mplayer/smplayer in their OSS emulation as well. It seems to happen > once > > I run my player first, then after that the other players exhibit the > > problem. > > In this case, mplayer will choose the ALSA mode automatically, I > guess. So the problem appears to be ALSA-mode specific, possibly > about dmix. > > Try to define the following in ~/.asoundrc: > pcm.!default "plughw" > > then it won't use dmix as default any more. (Then you can use only > one app at the same time, of course.) Check whether the problem can > be reproduced with this setting. > > > Takashi > > > > Sometimes after muting and unmuting my player, the problem goes > > away and also away on the players. It is almost like my player is > > causing bad internal state for the audio driver. Do you have any > > suggestions to work around this? > > > > -----Original Message----- > > From: Takashi Iwai [mailto:tiwai@xxxxxxx] > > Sent: Wednesday, June 25, 2008 3:23 AM > > To: Ashwin Chandra > > Cc: alsa-devel@xxxxxxxxxxxxxxxx > > Subject: Re: Alsa Issue - Sound playback starts on left > > speaker only > > > > At Wed, 25 Jun 2008 01:52:16 +0800, > > <Ashwin.Chandra@xxxxxxxxx> wrote: > > > > > > I have an Intel ALC861VD. Other players (mplayer, smplayer, aplay) > > don't > > > seem to exhibit this problem. Is there any workaround I can do in my > > > application so that upon first time sound playback, I can get it to > > play > > > on both channels? > > > > Check /proc/asound/card0/pcm0p/sub0/* files and compare between > > working and non-working states. I guess the working case uses OSS > > emulation or 16bit format. > > > > If so, try to add the following to ~/.asoundrc: > > > > defaults.pcm.dmix.format S16_LE > > > > > > Takashi > > > > > > > > -----Original Message----- > > > From: stan [mailto:ghjeold_i_mwee@xxxxxxx] > > > Sent: Tuesday, June 24, 2008 1:25 AM > > > To: Ashwin Chandra > > > Cc: alsa-devel@xxxxxxxxxxxxxxxx > > > Subject: Re: Alsa Issue - Sound playback starts on left > > > speaker only > > > > > > Ashwin.Chandra@xxxxxxxxx wrote: > > > > > > > > > > > > Hello, > > > > > > > > I am having an issue with my playback application where upon > > playback > > > > start, only the left speaker is outputted. But if I mute and > unmute > > > > (either through my application or using alsamixer), the sound > > playback > > > > resumes on both left and right speakers. This only happens on a > > > > particular system too (out of 5 systems). But I know it is my > issue > > > > because mplayer or smplayer works fine. > > > > > > > > > > > > > > > > I believe I am setting the correct HW params (ie. 2 channels), > etc. > > > > > > > > > > > > > > > > Any ideas? > > > > > > > > > > > > > > > > Thanks! > > > > > > > > > > > The ICE1724 driver has exactly this behavior. It is a known bug and > > has > > > > > > been there for years. > > > You don't say what chip is having the problem, but I would guess > that > > > this is it. Most people > > > just program a script to adjust the volume at startup to cure it. > > > _______________________________________________ > > > Alsa-devel mailing list > > > Alsa-devel@xxxxxxxxxxxxxxxx > > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > > > > > > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
