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    SubjectRe: [regression] 2.6.25-rc4 snd-es18xx broken on Alpha
    On 10-03-08 16:17, Rene Herman wrote:

    > On 10-03-08 08:34, Michael Cree wrote:
    >
    >> Bob Tracy wrote:
    >
    >>> Supposedly with the ES1888, dma1 is for capture, dma2 is for
    >>> playback. dma2 == 5 is a 16-bit channel, yes? That could explain
    >>> much...
    >
    > It is, but what would it explain? You're only having playback problems,
    > right?
    >
    >>>
    >>> As for the values "chosen" for dma1 and dma2, they are the ones that
    >>> keep showing up in the Alpha sound "howto" postings/documents.
    >>
    >> Running 'show config' in SRM on my Alphas (PWS500au and XP1000) reveals
    >> the settings (except possibly for mpu_port) for the ESS1888 sound chip.
    >> I recall that they are as reported in Alpha sound howtos.
    >
    > Can it be forced to use dma2=0 (an 8-bit channel, and the usual capture
    > channel on es18xx)? However, that might not be the issue anyway:
    >
    >> I hadn't been using the ESS1888 for awhile, but have just tried it out
    >> since you reported problems. I am running kernel 2.6.24.3 and Debian
    >> testing on the XP1000. I tried playing a number of wav files with
    >> alsa's aplay, sox's play and with mocp. I found that aplay and mocp
    >> worked reliably through the ESS1888. Sox's play on some files did play
    >> back a small extra segment of the file - particularly on short files and
    >> usually some section near the end of the file - once it had completed
    >> playing the file once; maybe this is what you are also observing.
    >
    > This sounds very suspiciously like a difference with playing through the
    > native ALSA interface and the OSS emulaion. Could you and/or Bob confirm
    > that sox is using the OSS emulation and not ALSA natively?

    Bob is spam-blocking me (sigh...) so perhaps you can make sure he sees this.

    > I could very well imagine the ALSA OSS emulation being broken on Alpha.
    > I doubt any of teh developers has an Alpha. And if aplay works correctly
    > this seems very likely.
    >
    > "sox" _can_ use ALSA natively as well by the way (see manpage for the
    > version you have installed).
    >
    >> More onerously, my testing eventually ended in a complete system lock up!
    >> I ran play (or was it aplay - sorry can't remember now)
    >
    > Vital if play is using the OSS interface...
    >
    >> and the system locked up. Got a response with ping across the network but
    >> couldn't log in via ssh. Have been playing mplayer through the ESS1888
    >> for the last couple of days (don't like it though - the sound quality of
    >> the ESS1888 is not good enough for my ears) and haven't had another one
    >> of those lockups since.
    >
    > Mmm.

    Rene


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