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SubjectRe: [SOUND] SBx00 sound card using snd_hda_codec_analog auto mutes
Date
Takashi Iwai <tiwai@suse.de> writes:

> At Fri, 11 Feb 2011 20:23:21 +0800,
> Wang Lei wrote:
>>
>> Thanks for your reply!
>>
>> Takashi Iwai <tiwai@suse.de> writes:
>>
>> > At Thu, 10 Feb 2011 20:49:51 +0800,
>> > Wang Lei wrote:
>> >>
>> >> On my laptop, the sound card auto mutes some seconds after i enable it.
>> >> And play a audio file can't make sound. This is not a powersave feature,
>> >> because i haven't enable it. I guess it's a driver problem. It occurs
>> >> since 2.6.36.X. Please help.
>> >
>> > Then a possible cause would be the badly working interrupts.
>> > Or, I remember vaguely some reports mentioning conflicts with radeon
>> > driver.
>> >
>> > Anyway, try to reproduce without the graphic interface first.
>> >
>>
>> I have reproduced it without the graphic interface.
>>
>> > Also, try to pass enable_msi=0 or 1. AMD controllers tend to unstable
>> > regarding MSI.
>> >
>>
>> And pass enable_msi=0 or 1 to snd_hda_intel, or even add boot parameter
>> pci=nomsi (i actually don't know whether this is reasonable), the
>> problem occurs.
>>
>> I have forgot to mention this, when passing apci=off to the boot kernel,
>> there is no this problem.
>
> Then check whether the interrupt is properly generated during PCM
> playback by watching /proc/interrupts. If not, it's likely an ACPI or
> BIOS problem.
>

I hope i did the right thing. I `cat /proc/interrupts > 1', then use
alsamixer increase the PCM channel, then `cat /proc/interrupts >2'.

This is the diff output:
--------------------
[~]$ diff -u 1 2
--- 1 2011-02-11 20:54:29.205759305 +0800
+++ 2 2011-02-11 20:54:35.912611712 +0800
@@ -1,21 +1,21 @@
CPU0 CPU1
- 0: 11355 9074412 IO-APIC-edge timer
- 1: 28 7111 IO-APIC-edge i8042
+ 0: 11355 9081104 IO-APIC-edge timer
+ 1: 28 7141 IO-APIC-edge i8042
7: 1 0 IO-APIC-edge
8: 0 0 IO-APIC-edge rtc0
9: 1 49 IO-APIC-fasteoi acpi
12: 4193 1186548 IO-APIC-edge i8042
14: 1 52 IO-APIC-edge pata_atiixp
15: 0 0 IO-APIC-edge pata_atiixp
- 16: 760 271833 IO-APIC-fasteoi ahci, hda_intel
+ 16: 760 271846 IO-APIC-fasteoi ahci, hda_intel
17: 344 84956 IO-APIC-fasteoi ohci_hcd:usb3, ohci_hcd:usb4, ohci_hcd:usb5, ohci_hcd:usb6
23: 1 7 IO-APIC-fasteoi ehci_hcd:usb1, ohci_hcd:usb2
NMI: 0 0 Non-maskable interrupts
-LOC: 9074392 11170 Local timer interrupts
+LOC: 9081084 11170 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 0 0 Performance monitoring interrupts
IWI: 0 0 IRQ work interrupts
-RES: 833684 997760 Rescheduling interrupts
+RES: 834075 998023 Rescheduling interrupts
CAL: 16 6 Function call interrupts
TLB: 21213 18762 TLB shootdowns
THR: 0 0 Threshold APIC interrupts
[~]$
--------------------
>
> Takashi


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