XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Martin Schlemmer [c]]

[-- Attachment #1: Type: text/plain, Size: 16657 bytes --]

Hi,

I have mailed below to alsa-user a time or two already, but no
response as of yet, so I am wondering if anybody here have had
similar issues.  Not much has changed, but I have also tried
BMP, and alsa-player, with similar results.

-----------

I have a Asus P4C800-E with a SoundMax 1985 audio chip on.
Alsa-lib-1.0.[56] and 2.6.[6789] kernel.  I have dmix setup (.asoundrc
below).

Now I mostly use XMMS for playing mp3's, and intermittently xmms
will just 'hang'.  It is not locked or anything, but the 'graph'
just stand still, and no audio.  If I press play again, it starts
to play for some time again.  This is especially easy to duplicate
if the box is under heavy load.  If I use the device directly,
without the dmix plugin, it works fine, or if I use oss emulation,
it works fine as well ...

If any more info is needed, let me know.  My .asoundrc and a strace
of XMMS pid follows.


My .asoundrc looks like this:

---
pcm.!default {
    type plug
    slave.pcm "asymed"
}

pcm.dsp0 {
    type plug
    slave.pcm "asymed"
}

ctl.mixer0 {
    type hw
    card 0
}

pcm.asymed {
    type asym
    playback.pcm "dmixer"
    capture.pcm "mixin"
}

pcm.dmixer  {
    type dmix
    ipc_key 1025
    slave {
        pcm "hw:0,0"
#        period_time 0
#        period_size 1024
#        buffer_size 4096
#        periods 128
#        rate 48000
    }
    bindings {
        0 0
        1 1
    }
}

pcm.mixin {
    type dsnoop
    ipc_key 1026
    ipc_key_add_uid yes
    slave {
        pcm "hw:0,0"
        channels 2
#        period_size 1024
#        buffer_size 4096
#        rate 48000
#        periods 0
#        period_time 0
    }
    bindings {
        0 0
        0 1
    }
}
---

And a strace of the xmms pid something like this (keeps looping,
and stops for a few seconds at every other poll):

---
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 0) = 0
gettimeofday({1090098067, 90349}, NULL) = 0
gettimeofday({1090098067, 90384}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\240\2\0\0L\0\20"..., 116) = 116
read(3, "\1\2\257\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098067, 90817}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098067, 101150}, NULL) = 0
gettimeofday({1090098067, 101214}, NULL) = 0
gettimeofday({1090098067, 101275}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 8) = 0
gettimeofday({1090098067, 110151}, NULL) = 0
gettimeofday({1090098067, 110194}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 0) = 0
gettimeofday({1090098067, 110350}, NULL) = 0
gettimeofday({1090098067, 110387}, NULL) = 0
gettimeofday({1090098067, 110485}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\0\2\20\0L\0\20"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098067, 120150}, NULL) = 0
gettimeofday({1090098067, 120191}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 0) = 0
gettimeofday({1090098067, 120345}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\253\0\0\0p\0"..., 76) = 76
read(3, "\1\2\264\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098067, 120680}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098067, 130139}, NULL) = 0
gettimeofday({1090098067, 130176}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 0) = 0
gettimeofday({1090098067, 130319}, NULL) = 0
gettimeofday({1090098067, 130353}, NULL) = 0
gettimeofday({1090098067, 130438}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0P\2\20\0L\0\20\0"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 727050}, NULL) = 0
gettimeofday({1090098071, 727116}, NULL) = 0
gettimeofday({1090098071, 727154}, NULL) = 0
gettimeofday({1090098071, 727261}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\240\2\20\0L\0\20"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 738803}, NULL) = 0
gettimeofday({1090098071, 738864}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\254\0\0\0p\0"..., 76) = 76
read(3, "\1\2\272\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098071, 739165}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 750043}, NULL) = 0
gettimeofday({1090098071, 750108}, NULL) = 0
gettimeofday({1090098071, 750145}, NULL) = 0
gettimeofday({1090098071, 750249}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\0\2 \0L\0\20\0"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 6) = 0
gettimeofday({1090098071, 758043}, NULL) = 0
gettimeofday({1090098071, 758090}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 1) = 0
gettimeofday({1090098071, 760033}, NULL) = 0
gettimeofday({1090098071, 760075}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 0) = 0
gettimeofday({1090098071, 760254}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\255\0\0\0p\0"..., 76) = 76
read(3, "\1\2\277\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098071, 760592}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 776028}, NULL) = 0
gettimeofday({1090098071, 776093}, NULL) = 0
gettimeofday({1090098071, 776128}, NULL) = 0
gettimeofday({1090098071, 776232}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0P\2 \0L\0\20\0\30"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 809155}, NULL) = 0
gettimeofday({1090098071, 809234}, NULL) = 0
gettimeofday({1090098071, 809273}, NULL) = 0
read(15, 0xbfffe850, 72)                = -1 EAGAIN (Resource temporarily unavailable)
gettimeofday({1090098071, 809426}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\240\2 \0L\0\20"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 820034}, NULL) = 0
gettimeofday({1090098071, 820103}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\256\0\0\0p\0"..., 76) = 76
read(3, "\1\2\305\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098071, 820476}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 831020}, NULL) = 0
gettimeofday({1090098071, 831083}, NULL) = 0
gettimeofday({1090098071, 831119}, NULL) = 0
gettimeofday({1090098071, 831223}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\0\0020\0L\0\20"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 7) = 0
gettimeofday({1090098071, 840020}, NULL) = 0
gettimeofday({1090098071, 840066}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 0) = 0
gettimeofday({1090098071, 840250}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\257\0\0\0p\0"..., 76) = 76
read(3, "\1\2\312\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098071, 840586}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 852096}, NULL) = 0
gettimeofday({1090098071, 852161}, NULL) = 0
gettimeofday({1090098071, 852211}, NULL) = 0
gettimeofday({1090098071, 852306}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0P\0020\0L\0\20\0"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 864690}, NULL) = 0
gettimeofday({1090098071, 864754}, NULL) = 0
gettimeofday({1090098071, 864817}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 5) = 0
gettimeofday({1090098071, 871014}, NULL) = 0
gettimeofday({1090098071, 871057}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 3) = 0
gettimeofday({1090098071, 875023}, NULL) = 0
gettimeofday({1090098071, 875094}, NULL) = 0
gettimeofday({1090098071, 875135}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\240\0020\0L\0\20"..., 88) = 88
read(3, "\1\2\317\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098071, 875567}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
select(4, [3], NULL, NULL, {0, 0})      = 0 (Timeout)
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 904090}, NULL) = 0
gettimeofday({1090098071, 904151}, NULL) = 0
gettimeofday({1090098071, 904197}, NULL) = 0
gettimeofday({1090098071, 904288}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\0\3\0\0L\0\20\0"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 915044}, NULL) = 0
gettimeofday({1090098071, 915135}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\1\0\0\0p\0\31"..., 48) = 48
read(3, "\1\2\323\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098071, 915546}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 932763}, NULL) = 0
gettimeofday({1090098071, 932831}, NULL) = 0
gettimeofday({1090098071, 932869}, NULL) = 0
gettimeofday({1090098071, 932976}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0P\3\0\0L\0\20\0"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 1) = 0
gettimeofday({1090098071, 935996}, NULL) = 0
gettimeofday({1090098071, 936049}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 6) = 0
gettimeofday({1090098071, 943001}, NULL) = 0
gettimeofday({1090098071, 943068}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\2\0\0\0p\0\31"..., 48) = 48
read(3, "\1\2\327\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098071, 943424}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 954008}, NULL) = 0
gettimeofday({1090098071, 954069}, NULL) = 0
gettimeofday({1090098071, 954103}, NULL) = 0
read(15, 0xbfffe850, 72)                = -1 EAGAIN (Resource temporarily unavailable)
gettimeofday({1090098071, 954256}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\240\3\0\0L\0\20"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098071, 968303}, NULL) = 0
gettimeofday({1090098071, 968368}, NULL) = 0
gettimeofday({1090098071, 968408}, NULL) = 0
gettimeofday({1090098071, 968516}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\0\3\20\0L\0\20"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098072, 2636}, NULL)  = 0
gettimeofday({1090098072, 2699}, NULL)  = 0
gettimeofday({1090098072, 2736}, NULL)  = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0P\3\20\0L\0\20\0"..., 88) = 88
read(3, "\1\2\335\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098072, 3081}, NULL)  = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098072, 13986}, NULL) = 0
gettimeofday({1090098072, 14056}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\4\0\0\0p\0\31"..., 48) = 48
read(3, "\1\2\340\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098072, 14404}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098072, 25462}, NULL) = 0
gettimeofday({1090098072, 25524}, NULL) = 0
gettimeofday({1090098072, 25559}, NULL) = 0
gettimeofday({1090098072, 25649}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\240\3\20\0L\0\20"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 6) = 0
gettimeofday({1090098072, 32981}, NULL) = 0
gettimeofday({1090098072, 33028}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 2) = 0
gettimeofday({1090098072, 36059}, NULL) = 0
gettimeofday({1090098072, 36129}, NULL) = 0
write(3, ">\3\7\0\213\7\300\2\32\0\300\0029\0\300\2\5\0\0\0p\0\31"..., 48) = 48
read(3, "\1\2\344\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098072, 36464}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098072, 46970}, NULL) = 0
gettimeofday({1090098072, 47034}, NULL) = 0
gettimeofday({1090098072, 47070}, NULL) = 0
gettimeofday({1090098072, 47176}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\0\3 \0L\0\20\0"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098072, 58798}, NULL) = 0
gettimeofday({1090098072, 58861}, NULL) = 0
gettimeofday({1090098072, 58931}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 4) = 0
gettimeofday({1090098072, 64932}, NULL) = 0
gettimeofday({1090098072, 64976}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 3) = 0
gettimeofday({1090098072, 68955}, NULL) = 0
gettimeofday({1090098072, 69020}, NULL) = 0
gettimeofday({1090098072, 69058}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0P\3 \0L\0\20\0\30"..., 88) = 88
read(3, "\1\2\351\376\0\0\0\0\22\0\240\2\0\0\0\0\0\0\0\0\1\0\0\0"..., 32) = 32
gettimeofday({1090098072, 69435}, NULL) = 0
ioctl(3, FIONREAD, [0])                 = 0
poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 3, 9) = 0
gettimeofday({1090098072, 106582}, NULL) = 0
gettimeofday({1090098072, 106663}, NULL) = 0
gettimeofday({1090098072, 106709}, NULL) = 0
gettimeofday({1090098072, 106836}, NULL) = 0
write(3, "\226\3\n\0\34\0\300\0029\0\300\2\0\6@\0\240\3 \0L\0\20"..., 40) = 40
ioctl(3, FIONREAD, [0])                 = 0
poll(
---

-- 
Martin Schlemmer

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Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Clemens Schwaighofer]

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On 11/01/2004 01:42 PM, Martin Schlemmer [c] wrote:
| Hi,
|
| I have mailed below to alsa-user a time or two already, but no
| response as of yet, so I am wondering if anybody here have had
| similar issues.  Not much has changed, but I have also tried
| BMP, and alsa-player, with similar results.
|
| -----------
|
| I have a Asus P4C800-E with a SoundMax 1985 audio chip on.
| Alsa-lib-1.0.[56] and 2.6.[6789] kernel.  I have dmix setup (.asoundrc
| below).
|
| Now I mostly use XMMS for playing mp3's, and intermittently xmms
| will just 'hang'.  It is not locked or anything, but the 'graph'
| just stand still, and no audio.  If I press play again, it starts
| to play for some time again.  This is especially easy to duplicate
| if the box is under heavy load.  If I use the device directly,
| without the dmix plugin, it works fine, or if I use oss emulation,
| it works fine as well ...

I have the same problem at home, I changed something in the .asoundrc
and it went away. it still plays a little bit skippy, but better than
suddenly stop.

I had this problem on a Sony Laptop (GRX series) with an i8x0 chipsetz
and a yamaha soundchip (which is controlled by the i8x0 drivers).

I can give more info if needed.

- --
[ Clemens Schwaighofer                      -----=====:::::~ ]
[ TBWA\ && TEQUILA\ Japan IT Group                           ]
[                6-17-2 Ginza Chuo-ku, Tokyo 104-0061, JAPAN ]
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Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Christophe Saout]

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Am Montag, den 01.11.2004, 06:42 +0200 schrieb Martin Schlemmer [c]:

> I have mailed below to alsa-user a time or two already, but no
> response as of yet, so I am wondering if anybody here have had
> similar issues.  Not much has changed, but I have also tried
> BMP, and alsa-player, with similar results.

I've tracked this down to what seems to be a bug in the libalsa dmix
code with mmap emulation. If the sound output was stopped for some
reason (stream paused or underrun) the library will accept more data
until the buffer is full but never restart the output.

https://bugtrack.alsa-project.org/alsa-bug/view.php?id=209


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Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Jan Knutar]

On Tuesday 02 November 2004 10:57, Christophe Saout wrote:

> I've tracked this down to what seems to be a bug in the libalsa dmix
> code with mmap emulation. If the sound output was stopped for some
> reason (stream paused or underrun) the library will accept more data
> until the buffer is full but never restart the output.

Strangely, I've observed these kinds of "Hangs" with bmp and mplayer,
without mmap mode enabled in either. Also using dmix as in the other
reports here. Could of course be some third application using alsa in
mmap mode, I suppose.

Unfortunately, I have no strace to offer right now as the bug is happening
randomly and I haven't been able to find any method by which to reproduce
it.

What's strange is that almost always when it happens, either mplayer or
beep-media-player will have an extra forked process. As bmp is threaded
and I shouldn't see more than one bmp in ps aux on NPTL, this seemed a
bit strange. Strace on the process that looked more recent makes it usually
wake up from deep sleep, and then it promptly vanishes after only a few syscalls.
The strace itself seems to wake it up... After the 'extra' process is gone,
sound output usually resumes, but not always. Other times strace only reveals
the app doing nanosleep's and nothing else, and the only solution is to kill
all apps that might've touched sound.

Another dmix+mplayer issue I have is that mplayer's get_delay for alsa seems
to return bogus values for alsa+dmix case, but I digress...

Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Christophe Saout]

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Am Dienstag, den 02.11.2004, 13:40 +0200 schrieb Jan Knutar:

> > I've tracked this down to what seems to be a bug in the libalsa dmix
> > code with mmap emulation. If the sound output was stopped for some
> > reason (stream paused or underrun) the library will accept more data
> > until the buffer is full but never restart the output.
> 
> Strangely, I've observed these kinds of "Hangs" with bmp and mplayer,
> without mmap mode enabled in either. Also using dmix as in the other
> reports here. Could of course be some third application using alsa in
> mmap mode, I suppose.

It might have something to do whether dmix needs to convert the data or
not. In my case /proc shows that the card supports 48kHz but bmp plays a
44kHz file.

> Unfortunately, I have no strace to offer right now as the bug is happening
> randomly and I haven't been able to find any method by which to reproduce
> it.

100% reproducable on my machine. I stopped debugging when I found out
that it happened somewhere deep inside the libalsa dmix core, the code
didn't look easy to follow.

> What's strange is that almost always when it happens, either mplayer or
> beep-media-player will have an extra forked process.

This has something to do with dmix forking off a process, I don't know
exactly what it is for, it does something with the dmix unix socket
in /tmp.


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Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Jan Knutar]

On Tuesday 02 November 2004 13:52, Christophe Saout wrote:

> > What's strange is that almost always when it happens, either mplayer or
> > beep-media-player will have an extra forked process.
> 
> This has something to do with dmix forking off a process, I don't know
> exactly what it is for, it does something with the dmix unix socket
> in /tmp.

Aha. I've also, I recall, seen player hang right on start, and then also presumably
in alsa-lib trying to open the socket in /tmp but blocking forever on that for some
reason... Intermittent bugs are the most annoying of all :-)

Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Martin Schlemmer [c]]

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On Tue, 2004-11-02 at 16:43 +0900, Clemens Schwaighofer wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 11/01/2004 01:42 PM, Martin Schlemmer [c] wrote:

> | Now I mostly use XMMS for playing mp3's, and intermittently xmms
> | will just 'hang'.  It is not locked or anything, but the 'graph'
> | just stand still, and no audio.  If I press play again, it starts
> | to play for some time again.  This is especially easy to duplicate
> | if the box is under heavy load.  If I use the device directly,
> | without the dmix plugin, it works fine, or if I use oss emulation,
> | it works fine as well ...
> 
> I have the same problem at home, I changed something in the .asoundrc
> and it went away. it still plays a little bit skippy, but better than
> suddenly stop.
> 
> I had this problem on a Sony Laptop (GRX series) with an i8x0 chipsetz
> and a yamaha soundchip (which is controlled by the i8x0 drivers).
> 
> I can give more info if needed.
> 

I would appreciate that.  Any workaround currently will be nice.


Thanks,

-- 
Martin Schlemmer


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Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Martin Schlemmer [c]]

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On Tue, 2004-11-02 at 09:57 +0100, Christophe Saout wrote:
> Am Montag, den 01.11.2004, 06:42 +0200 schrieb Martin Schlemmer [c]:
> 
> > I have mailed below to alsa-user a time or two already, but no
> > response as of yet, so I am wondering if anybody here have had
> > similar issues.  Not much has changed, but I have also tried
> > BMP, and alsa-player, with similar results.
> 
> I've tracked this down to what seems to be a bug in the libalsa dmix
> code with mmap emulation. If the sound output was stopped for some
> reason (stream paused or underrun) the library will accept more data
> until the buffer is full but never restart the output.
> 
> https://bugtrack.alsa-project.org/alsa-bug/view.php?id=209
> 

I will be honest that I cannot remember the outcome when I tried without
mmap support - was some time back.  I will try now again.

I also had a look at the bug, and it seems like it could be if it must
do conversion - any way to disable it, or some other workaround ?  Or
anybody to bug/help to patch this ? =)


Thanks,

-- 
Martin Schlemmer


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Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Martin Schlemmer [c]]

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On Tue, 2004-11-02 at 13:40 +0200, Jan Knutar wrote:
> On Tuesday 02 November 2004 10:57, Christophe Saout wrote:
> 
> > I've tracked this down to what seems to be a bug in the libalsa dmix
> > code with mmap emulation. If the sound output was stopped for some
> > reason (stream paused or underrun) the library will accept more data
> > until the buffer is full but never restart the output.
> 
> Strangely, I've observed these kinds of "Hangs" with bmp and mplayer,
> without mmap mode enabled in either. Also using dmix as in the other
> reports here. Could of course be some third application using alsa in
> mmap mode, I suppose.
> 
> Unfortunately, I have no strace to offer right now as the bug is happening
> randomly and I haven't been able to find any method by which to reproduce
> it.
> 
> What's strange is that almost always when it happens, either mplayer or
> beep-media-player will have an extra forked process. As bmp is threaded
> and I shouldn't see more than one bmp in ps aux on NPTL, this seemed a
> bit strange. Strace on the process that looked more recent makes it usually
> wake up from deep sleep, and then it promptly vanishes after only a few syscalls.
> The strace itself seems to wake it up... After the 'extra' process is gone,
> sound output usually resumes, but not always. Other times strace only reveals
> the app doing nanosleep's and nothing else, and the only solution is to kill
> all apps that might've touched sound.
> 

I cannot say that I have seen this.  It always just resumes fine if I
click on play again, and I cannot remember it having an extra process.
But then I mostly tried it with mmap enabled (as without it also had
this issue), so I will have a look without mmap, and report if similar
issues happens this side.


Thanks,

-- 
Martin Schlemmer


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Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Clemens Schwaighofer]

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On 11/03/2004 10:45 AM, Martin Schlemmer [c] wrote:

> I would appreciate that.  Any workaround currently will be nice.

attached my .asoundrc

What I did, I halfed the buffer_size from 8K to 4K. After that it worked
fine.

I really don't know why that is.

my soundcard acording to lspci is:

0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801CA/CAM AC'97
Audio Controller (rev 02)
        Subsystem: Sony Corporation: Unknown device 80fa
        Flags: bus master, medium devsel, latency 0, IRQ 9
        I/O ports at 1c00 [size=256]
        I/O ports at 18c0 [size=64]

but I know there is a yamaha chip behind, because in windows xp, I use
yamaha drivers.

lg, clemens

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pcm.!default {
	type plug
	slave.pcm "dmixer"
}

pcm.dsp0 {
	type plug
	slave.pcm "dmixer"
}

pcm.dmixer {
	type dmix
	ipc_key 1024
	slave {
		pcm "hw:0,0"
		period_time 0
		period_size 1024
		buffer_size 4096
		rate 44100
	}
	bindings {
		0 0
		1 1
	}
}

ctl.dmixer {
	type hw
	card 0
}

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Re: XMMS (or some other audio player) 'hang' issues with intel8x0 and dmix plugin [u]

[Martin Schlemmer [c]]

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On Wed, 2004-11-03 at 15:36 +0900, Clemens Schwaighofer wrote:
> On 11/03/2004 10:45 AM, Martin Schlemmer [c] wrote:
> 
> > I would appreciate that.  Any workaround currently will be nice.
> 
> attached my .asoundrc
> 
> What I did, I halfed the buffer_size from 8K to 4K. After that it worked
> fine.
> 

I will try this, thanks.  I had my period/buffer size the same, but the
rate I had 48000 .. maybe this could be it.

Also, I am positive that with alsa-lib-1.0.5, with/without mmap, it
would do the same, but I put it on without mmap last night, and now
about 22/24 hours later it was still playing, so it might be fixed
for non-mmap at least.

My audio controller is also an Intel (SoundMax):

-----
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801EB/ER
(ICH5/ICH5R) AC'97 Audio Controller (rev 02)
        Subsystem: ASUSTeK Computer Inc. P4P800 Mainboard
        Flags: bus master, medium devsel, latency 0, IRQ 201
        I/O ports at e800
        I/O ports at ee80 [size=64]
        Memory at febff800 (32-bit, non-prefetchable) [size=512]
        Memory at febff400 (32-bit, non-prefetchable) [size=256]
        Capabilities: [50] Power Management version 2
-----

and somebody else had an intel chipset mobo with yamaha sound chip
on, so I do not know if it might be with intel chipset based ac97
sound that this issue comes to light - anybody else have an sis/nvidia
based board?


Thanks,

-- 
Martin Schlemmer


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