Messages in this thread | | | Date | Fri, 11 Feb 2011 13:50:16 +0100 | From | Takashi Iwai <> | Subject | Re: [SOUND] SBx00 sound card using snd_hda_codec_analog auto mutes |
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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.
Takashi
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