Red Hat Bugzilla – Bug 140260
FC3 alsa emu10k1 no spdif ac3 passthrough
Last modified: 2007-11-30 17:10:55 EST
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Description of problem:
SBLive sound card.
I can enable digital output with alsamixer and pass PCM data to and
external reciever but using mplayer -ao alsa -ac hwac3 ... doesn't
pass ac3 to the receiver. The audio receiver detects a 5.1 stream but
goes in and out so I'm assuming the stream is corrupted somehow.
After reinstalling FC2 I can varify that spdif output works fine in
fc3. There are no errors in /var/log/messages I wish that I could post
some more diagnostic info but there are no errors to report other than
ac3 passthrough not working. /etc/modprobe is default from
system-config-soundcard and used alsamixer to unmute digital-out.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Install fc3.
2. Enable digital-out with alsamixer
3. PCM fine. No ac3
Actual Results: No ac3 output to external audio receiver.
Expected Results: Receiver should have detected a 5.1 ditial signal
This works just fine in fc2.
Someone else seems to be having the same problem with madrake on a 2.6
kernel...not much info.
This seems to be a problem with the stock kernels for fedora core 3. I
tried downloading and compiling kernel 2.6.7 and 2.6.10 from
kernel.org. Running with these kernels the spdif works perfectly.
Also while running core 2 i experienced this problem when upgrading to
a new kernel (sorry can't remember which one, think it was
And what about kernel in devel branch? Does it work too?
Seems to be fine now with 2.6.10-1.741smp. You can probably close this.