SiS748/963L + CMI9739, no IRQs from card?

SiS748/963L + CMI9739, no IRQs from card?

[Friedrich Ewaldt]

Hi,

I've described my problem some days ago on the user list, but it seems 
like no user knows a solution to this -- which is no big surprise as the 
hardware I'm using is quite new.
Perhaps one of the developers can help out.

Here a short summary of the problem:
(details, logs, etc. can be found in my previous messages:
http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg10537.html
http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg10562.html
)

* Alsa rc1

* ASrock Mainboard K7S8XE with SiS748/963L + CMI9739 onboard sound

* modules loaded without problems
(snd-intel8x0, snd-ac97-codec, ...)

* soundcard is correctly(?) detected: alsamixer shows:
SiS SI7012, C-Media Electronics CMI9739

* mixer is working fine (I can control e.g. the volume of CD analog input)

* PCM playback blocks: applications seem to wait for interrupt from 
soundcard. When running e.g. aplay,
proc/asound/card0/pcm0p/sub0/state shows

state: RUNNING
trigger_time: 1070397701.434501000
tstamp      : 1070397750.192659000
delay       : 7194
avail       : 4806
avail_max   : 0
-----
hw_ptr      : 4804
appl_ptr    : 11998

and hw_ptr doesn't change over time. I have no sound daemon running. 
Before starting aplay the sub0/state was 'closed'.

* same behaviour with oss-layer, alsa, alsa mmap. xmms hangs when I hit 
the play button.

* No PCM sound is output

* /proc/interrupts shows no IRQs sent from soundcard:
...
2:          0          XT-PIC  cascade
5:          0          XT-PIC  usb-ohci, ehci_hcd, SiS SI7012
8:          1          XT-PIC  rtc
...

Is there anything else I could try? Any additional debugging information 
I can provide besides the info in the 2 user-list mails mentioned above?
Thanks in advance for any help!




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Re: SiS748/963L + CMI9739, no IRQs from card?

[Tim Goetze]

Friedrich Ewaldt wrote:

>Is there anything else I could try? Any additional debugging information
>I can provide besides the info in the 2 user-list mails mentioned above?
>Thanks in advance for any help!

have you tried enabling the kernel build options 'IO-APIC support on
uniprocessors' and 'Local APIC Support on Uniprocessors' yet (provided
your box does ACPI; probably so since you say it is a recent design)?

i ask because on this box there were dropped interrupts from the audio
interface when the interrupt line was also shared between three
devices. enabling the above options rendered the interface with an
exclusive interrupt line, with good results.

if your kernel was already built with those options turned on, check
the kernel boot options for 'pci=noacpi' or 'acpi=off'.

hth,

tim


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Re: SiS748/963L + CMI9739, no IRQs from card?

[Andrew Burgess]

>have you tried enabling the kernel build options 'IO-APIC support on
>uniprocessors' and 'Local APIC Support on Uniprocessors' yet (provided
>your box does ACPI; probably so since you say it is a recent design)?

Good advice. 

Also try changing BIOS setting related to interrupts, mine has a
selection 'assign pci interrupts' or something like that.

HTH


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