At Fri, 17 Oct 2008 11:57:08 +0400,The Source wrote:> > Takashi Iwai пишет:> > At Thu, 16 Oct 2008 22:18:07 +0400,> > The Source wrote:> > > >>>> Ok. OpenAL with alsa also seem to cause problems.> >>>> > >>>> > >>> In both cases, check the period_size and buffer_size values (shown in> >>> the kernel message, or /proc/asound/card0/pcm0p/sub0/hw_params).> >>> And, try to aplay with these parameters, whether you get the similar> >>> problem.> >>>> >>> % aplay -v --period-size=xxx --buffer-size=yyy foo.wav> >>>> >>>> >>> Takashi> >>>> >>> > >>> > >> I'm sorry, but any attemp to play file with ossplay results in complete > >> system hang with error:> >> unable to handle NULL ponter dereference at address > >> 0000000000000008.....(hang, no more output).> >> I tried many wav formats. So I can't get error log or period and buffer > >> sizes, sorry.> >> > >> > Can anyone confirm to reproduce Oops with OSS apps (ossplay)?> >> > I'm wondering whether this has anything to do with the capture.> > Can you record the sound, and change the capture mixer element properly?> >> >> > thanks,> >> > Takashi> >> > > I checked mplayer. It uses period size 1024 instead of 4096 and 16384 > buffer size (default). Sound is choppy (sound pauses is more frequent > when rate is lower).> However an attempt to play the same file with the same period and buffer > sizes with aplay results in complete system hang.
OK, that looks like a problem. Looks like the timer resolution can beshort like that, or something racy in the timer handling.
Can you check whether this happens with XXX_SYSTEM_TIMER, too?
Or, does the patch below avoid the problem, at least?
thanks,
Takashi
diff --git a/sound/pci/sbxfi/sbxfi.c b/sound/pci/sbxfi/sbxfi.cindex 26a6cd3..5ceb228 100644--- a/sound/pci/sbxfi/sbxfi.c+++ b/sound/pci/sbxfi/sbxfi.c@@ -277,6 +277,7 @@ static void sbxfi_rearm_timer(struct sbxfi *chip, int ticks) #else #define MAX_TICKS ((1 << 13) - 1)+#define MIN_TICKS 1000 /* FIXME: really so? */ static void sbxfi_init_timer(struct sbxfi *chip) {@@ -287,6 +288,8 @@ static void sbxfi_set_timer(struct sbxfi *chip, int ticks) LOG(2, "SET TIMER TICKS = %d\n", ticks); if (ticks > MAX_TICKS) ticks = MAX_TICKS;+ else if (ticks < MIN_TICKS)+ ticks = MIN_TICKS; sbxfi_write(chip, TIMR, ticks | TIMR_IE | TIMR_IP); } static void sbxfi_stop_timer(struct sbxfi *chip)_______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel
