Bug 196045 - Soundcard does not work with xen kernel
Soundcard does not work with xen kernel
Status: CLOSED WONTFIX
Product: Fedora
Classification: Fedora
Component: kernel-xen (Show other bugs)
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All Linux
medium Severity medium
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Assigned To: Eduardo Habkost
Virtualization Bugs
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Reported: 2006-06-20 12:16 EDT by Dennis Jacobfeuerborn
Modified: 2009-12-14 15:37 EST (History)
3 users (show)

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Doc Type: Bug Fix
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Last Closed: 2008-02-26 18:11:52 EST
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Attachments (Terms of Use)
logfile of soundcard detection on xen enabled kernel (13.96 KB, text/plain)
2006-06-20 12:16 EDT, Dennis Jacobfeuerborn
no flags Details
s-c-s logfile (41.85 KB, text/plain)
2007-03-22 16:58 EDT, Dennis Jacobfeuerborn
no flags Details

  None (edit)
Description Dennis Jacobfeuerborn 2006-06-20 12:16:29 EDT
When booting kernel-xen-2.6.16-1.2289_FC6 my soundcard (Audiophile 24/96) no
longer gets initialized properly. The snd_ice1712 shows up in lsmod but
/proc/asound/cards is empty. After booting back into a regular kernel audio
works fine again.

scsound.log attached
Comment 1 Dennis Jacobfeuerborn 2006-06-20 12:16:29 EDT
Created attachment 131205 [details]
logfile of soundcard detection on xen enabled kernel
Comment 2 Dennis Jacobfeuerborn 2007-03-21 19:26:14 EDT
I switched to a new box but kept the same soundcard and this still doesn't work.
The kernel (2.6.19-1.2898.2.3.fc7xen) does seem to detect the soundcard but
misses out on the pcm bits. Here is what scsrun.log says:

ALSA lib pcm_hw.c:1357:(_snd_pcm_hw_open) Invalid value for card
aplay: main:550: audio open error: No such device
cat: /etc/asound.conf: No such file or directory
amixer: Mixer attach default error: No such device
Running from command-line...
Comment 3 Stephen Tweedie 2007-03-22 08:22:26 EDT
Can you please include kernel logs of the soundcard detection?  All I can see
attached so far is the user-space alsa/alsalib logs, but we really need to see
what the kernel is reporting at boot time to debug this.  Thanks!
Comment 4 Dennis Jacobfeuerborn 2007-03-22 16:58:56 EDT
Created attachment 150698 [details]
s-c-s logfile

This is a current logfile generated by s-c-s. I checked both the dmesg output
and /var/log/messages but neither seem to contain any messages related to the
soundcard whatsoever. How do I get to the information you need?
Comment 5 Stephen Tweedie 2007-03-26 11:30:13 EDT
"dmesg" shortly after boot should have it.  From your quote "The kernel
(2.6.19-1.2898.2.3.fc7xen) does seem to detect the soundcard" can we assume that
the kernel is giving at least _some_ indication of having found it?
Comment 6 Dennis Jacobfeuerborn 2007-03-28 10:44:52 EDT
The dmesg output is present in the logfiles above but I've never seen any output
by the sound-subsystem in the kernel messages either using xen or the regular
kernel.

I assumed that the modules found something by looking at /proc/asound/devices
which contained this:
  2:        : timer
  3:        : sequencer
but thinking about it now these are probably some generic elements that would
appear even without a soundcard present.

So it looks like the kernel loads the appropriate modules without indicating an
error but alsa doesn't quite seem to pick it up from there. Is there any way to
get more verbose output when loading the modules or initializing the audio
subsystem?
Comment 7 Red Hat Bugzilla 2007-07-24 19:55:50 EDT
change QA contact
Comment 8 Chris Lalancette 2008-02-26 18:11:52 EST
This report targets FC6, which is now end-of-life.

Please re-test against Fedora 7 or later, and if the issue persists, open a new bug.

Thanks

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