Messages in this thread | | | Date | Wed, 15 Jan 2003 10:31:38 +0100 | From | Takashi Iwai <> | Subject | Re: [BUG/WARNING?] 2.5.57 ALSA sound/core/pcm_lib.c |
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At Wed, 15 Jan 2003 01:27:37 +0100 (CET), Martijn Uffing wrote: > > Ave people. > > In 2.5.57 I get a bug/warning when I'm using xmms. Xmms is configured for > OSS output,and the kernel is configured for ALSA sound including OSS emulation. > > The following message is found in dmesg. > "ALSA sound/core/pcm_lib.c:123: Unexpected hw_pointer value (stream = 0, > delta: -280, max jitter = 8192): wrong interrupt acknowledge? " > I tried to reproduce the error and got another one. Only know the > delta > is -1008. > > I didn't notice this messages until I looked in dmesg. So no hickup or > something from xmms. The song played fine. > So the question is: Is this just a warning or a bug?
the message appears when the period (fragment) has not been processed enough fast as expected. a typical reason is the delay of hardware interrupts, but this could be, of course, a bug of the driver, too.
this would be a bit problem if the application uses small numbers of periods. but in the case of xmms, it won't be serious. if you don't see such a message not too often, you can ignore it... (at least, i've never heard about this kind of bug on ens1371 driver.)
-- Takashi Iwai <tiwai@suse.de> SuSE Linux AG - www.suse.de ALSA Developer ALSA Project - www.alsa-project.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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