Takashi Iwai wrote: > At Thu, 8 Mar 2007 17:52:43 +0100, > Michal Piotrowski wrote: > >> On 08/03/07, Takashi Iwai <tiwai@xxxxxxx> wrote: >> >>> At Thu, 08 Mar 2007 16:42:26 +0100, >>> Michal Piotrowski wrote: >>> >>>>> Also, it'd be helpful if you compare >>>>> /proc/asound/card0/codec97#0/ac97#0-0+regs file before and after the >>>>> patch. This reveals which register bits differ actually. >>>>> >>>> a2.txt is form 2.6.21-rc3 witchout 831466f4ad2b5fe23dff77edbe6a7c244435e973 >>>> >>>> diff -uprN a2.txt /proc/asound/card0/codec97#0/ac97#0-0+regs >>>> --- a2.txt 2007-03-08 16:36:47.000000000 +0100 >>>> +++ /proc/asound/card0/codec97#0/ac97#0-0+regs 2007-03-08 16:36:49.447083597 +0100 >>>> @@ -56,8 +56,8 @@ >>>> 0:6e = 0000 >>>> 0:70 = 0000 >>>> 0:72 = 0004 >>>> -0:74 = 1001 >>>> -0:76 = 64a4 >>>> +0:74 = 1201 >>>> +0:76 = 7ca4 >>>> 0:78 = 000c >>>> 0:7a = 0000 >>>> 0:7c = 4144 >>>> >>> OK, some wrong bits there. Could you try the patch below? >>> >> Problem fixed. Thanks! >> >> (speaker-test -c6 -Dplug:surround51 is still broken) >> > > Hm, how about turning off "Spread Front To..." control and run > speaker-test? > > > Takashi > > > Michal and Takashi, I've been researching your issue this morning. I just noticed that your exchange had ensued. I configured my AD1986-based system as closely as I could to match your AD1985 mixer settings. In doing so, I experienced results similar to what I'm assuming you described: Only front channel sound came out of the surround and c/lfe jacks. Here is what I had to change to get the appropriate multichannel sound: 1) The command "speaker-test -c6" does not work on my system. I have to use "speaker-test -Dsurround51 -c6" (Perhaps this is related to running an old version of speaker-test.) 2) I disabled "Spread Front to Surround and Center/LFE" The explanation for 2) is this: There can be only one source for each of the Surround and Center/LFE jacks active at one time. When "Spread Front to Surround and Center/LFE" is disabled, the surround channels go to the the jacks; when this control is enabled, ONLY the front channels go to the surround and c/lfe jacks. Considering the register values Michal provided and Takashi's patch: The logic of the code is as follows: (Slightly simplifying,) functions is_shared_linein() and is_shared_micin() return TRUE if the mixer is configured for shared jacks AND NOT for 6 channel mode. In this case it is appropriate to set these bits (LODIS and CLDIS). Please double-check your mixer settings. I added a byte to a structure, so the mixer settings can get messed up switching between alsa-kernel versions. I don't understand why the other bit (OMS, 0x74 bit D9) is set. This may have been an oversight on my part. I am modifying alsa-kernel to run as an AD1985 on my system, to try to check these bits. Randy Cushman ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
