Damien Sandras wrote:
I subscribed to this mailing list, because GnomeMeeting users have
reported a problem using ALSA 0.9.0RC5 together with GnomeMeeting and
RedHat 8.0.
Actually, the problem is simple to explain, hard to fix, at least for
me. Several users complained that using GnomeMeeting was freezing their
machine. This corresponds to a driver bug, somewhere, as "user-space"
programs can't crash a machine directly. The only particularity of
GnomeMeeting is that it is reading and writing to the device at the same
time.
I had similar problems. A patch from Jaroslav Kysela fixed the problem
for me (see attachment).
Thanks,
bye,
Wilfried
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/core/oss/pcm_oss.c,v
retrieving revision 1.21
retrieving revision 1.22
diff -u -r1.21 -r1.22
--- alsa/alsa-kernel/core/oss/pcm_oss.c 2002/10/21 18:28:20 1.21
+++ alsa/alsa-kernel/core/oss/pcm_oss.c 2002/10/30 20:29:15 1.22
@@ -564,7 +564,15 @@
} else {
ret = snd_pcm_lib_read(substream, ptr, frames);
}
- if (ret != -EPIPE && ret != -ESTRPIPE)
+ if (ret == -EPIPE) {
+ if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
+ ret = snd_pcm_kernel_ioctl(substream,
+SNDRV_PCM_IOCTL_DROP, 0);
+ if (ret < 0)
+ break;
+ }
+ continue;
+ }
+ if (ret != -ESTRPIPE)
break;
}
return ret;
