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[Openvortex-dev] Re: au8830 - front / rear channels swapped after first


From: Raymond
Subject: [Openvortex-dev] Re: au8830 - front / rear channels swapped after first play and Surround40
Date: Sun, 27 Mar 2005 00:38:11 +0800
User-agent: Mozilla/5.0 (X11; U; Linux i686; zh-CN; rv:1.4.3) Gecko/20041005


>>Using "vortex_adbdma_stopfifo()" instead of vortex_adbdma_pausefifo()"
>>in snd_vortex_pcm_trigger() (just like the last version of au88x0 in
>>alsa-driver before it merged into alsa-kernel) seem to fix the
>>front/rear channels swap when playing 4 channels sound in au8830.

Manuel Jander wrote:
>
> Does the IRQ fifo error appear once for every sound played or a lot
> more than that ? if it appears once for every PCM plaayback start, it
> may be that this error is just a harmless "fifo empty" error, and as
> such could be just ignored. An if it really signals a FIFO empty
> error, it maybe useful to detect xruns ?

The fifo error also occur when using the pause/resume button of xmms 1.2.10 (alsa 1.2.10 output plugin) to pause and resume of the playing of music.

vortex: start 0
vortex: IRQ fifo error
vortex: pause 0
vortex: resume 0
vortex: IRQ fifo error
vortex: pause 0
vortex: resume 0
vortex: pause 0
vortex: resume 0
vortex: IRQ fifo error
vortex: pause 0
vortex: resume 0
vortex: IRQ fifo error
vortex: stop 0


1) How to prove that it is just a harmless "fifo empty" error ?

The outls.wav and outrs.wav (may be too short) cannot be paused in xmms.


Raymond












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