snd_hda, codec attaching randomly?

[David Demelier]

On 12/03/2011 19:47, David Demelier wrote:
> On 10/03/2011 08:17, David Demelier wrote:
>> Hello,
>>
>> I've setup a brand new computer from scratch, it has two HDMI output
>> (via the on board and via the ati graphic card) with one codec for the
>> main board.
>>
>> Usually I have these pcm :
>>
>> pcm0: <HDA ATI R6xx HDMI PCM #0 HDMI> at cad 0 nid 1 on hdac0
>> pcm1: <HDA Realtek ALC888 PCM #0 Analog> at cad 0 nid 1 on hdac1
>> pcm2: <HDA Realtek ALC888 PCM #1 Analog> at cad 0 nid 1 on hdac1
>> pcm3: <HDA Realtek ALC888 PCM #2 Digital> at cad 0 nid 1 on hdac1
>> pcm4: <HDA Intel G45 HDMI PCM #0 DisplayPort> at cad 3 nid 1 on hdac1
>>
>> But sometime when I boot the pcm4 disappear, with a lot of :
>>
>> hdac1: hdac_widget_connection_parse: nid=2 WARNING: zero cnid entnum=4
>> j=0 index=0 entries=17 found=0 res=0x00000000
>> hdac1: hdac_widget_connection_parse: nid=2 WARNING: zero cnid entnum=4
>> j=1 index=0 entries=17 found=1 res=0x00000000
>> hdac1: hdac_widget_connection_parse: nid=2 WARNING: zero cnid entnum=4
>> j=2 index=0 entries=17 found=2 res=0x00000000
>> hdac1: hdac_widget_connection_parse: nid=2 WARNING: zero cnid entnum=4
>> j=3 index=0 entries=17 found=3 res=0x00000000
>> [.. snip ..]
>>
>> Here you can see the normal dmesg file :
>> http://files.malikania.fr/normal.txt
>>
>> And here when the pcm disappear :
>> http://files.malikania.fr/notnormal.txt
>>
>> A simple diff from the files show some weird things:
>>
>> diff -ub normal.txt notnormal.txt
>> --- normal.txt 2011-03-10 08:06:14.000000000 +0100
>> +++ notnormal.txt 2011-03-10 08:06:18.000000000 +0100
>> @@ -116,24 +116,90 @@
>> hdac0: HDA Codec #0: ATI R6xx HDMI
>> pcm0: <HDA ATI R6xx HDMI PCM #0 HDMI> at cad 0 nid 1 on hdac0
>> hdac1: HDA Codec #0: Realtek ALC888
>> -hdac1: HDA Codec #3: Intel G45 HDMI
>> +hdac1: HDA Codec #3: Intel Q57 HDMI
>> +hdac1: hdac_widget_connection_parse: nid=2 WARNING: zero cnid entnum=4
>> j=0 index=0 entries=17 found=0 res=0x00000000
>> +hdac1: hdac_widget_connection_parse: nid=2 WARNING: zero cnid entnum=4
>> j=1 index=0 entries=17 found=1 res=0x00000000
>>
>> [... message repeated a lot of time ...]
>>
>> pcm1: <HDA Realtek ALC888 PCM #0 Analog> at cad 0 nid 1 on hdac1
>> pcm2: <HDA Realtek ALC888 PCM #1 Analog> at cad 0 nid 1 on hdac1
>> pcm3: <HDA Realtek ALC888 PCM #2 Digital> at cad 0 nid 1 on hdac1
>> -pcm4: <HDA Intel G45 HDMI PCM #0 DisplayPort> at cad 3 nid 1 on hdac1
>>
>> Why does the HDMI codec is renamed to Q57?
>>
>> I didn't tweak snd_hda(4) much, I only added the following in my
>> /boot/devices.hints to get a proper jack-sense on my front panel:
>>
>> hint.hdac.1.cad0.nid27.config="as=1 seq=15"
>>
>> Cheers,
>>
>
> Oh I noticed something weird too:
>
> SMP: AP CPU #1 Launched!
> -SMP: AP CPU #3 Launched!
> SMP: AP CPU #2 Launched!
> +SMP: AP CPU #3 Launched!
>
> It seems the order of CPU change? I know that the Intel GMA HD graphics
> needs a Intel CPU compatible to get this video chipset working.
>
> So maybe the audio codec is attaching to the wrong core? I have no
> really idea, it appears really randomly nothing can change the behavior
>
> Cheers,
>

The update of the bios seems to solve the problem (not appears for 10 times)

Users of Intel DH55HC are encouraged to upgrade the bios following this 
link :

http://downloadcenter.intel.com/Detail_Desc.aspx?lang=eng&amp;changeLang=true&DwnldId=19947

No need to install windows, put the .BIO file on a usb key and press F7 
when booting.

Hope it will helps someone.

Cheers,

-- 
David Demelier