[Bugme-new] [Bug 11419] New: No sound output with cmipci on SP/DIF

bugme-daemon at bugzilla.kernel.org bugme-daemon at bugzilla.kernel.org
Sun Aug 24 13:57:21 PDT 2008


http://bugzilla.kernel.org/show_bug.cgi?id=11419

           Summary: No sound output with cmipci on SP/DIF
           Product: Drivers
           Version: 2.5
     KernelVersion: 2.6.26
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Sound(ALSA)
        AssignedTo: perex at perex.cz
        ReportedBy: jmm at debian.org


Latest working kernel version: 2.6.18 (maybe later ones as well)
Earliest failing kernel version: 2.6.25
Distribution: Debian
Hardware Environment: C-Media CMI8738
Software Environment: Debian Lenny
Problem Description:

I've upgraded my system from Debian Etch with a 2.6.18 kernel to the current
pre-release version of Debian Lenny and I no longer have sound output on
SP/DIF.

I've tested 2.6.25 and 2.6.26 kernels. All media players seem to process the
audio just fine. If I boot the 2.6.18 kernel sound output works fine again.

Steps to reproduce: Play any sound file.

I'm attaching the output of /proc/asound/DEVICE/cmipci as advised in the ALSA
wiki:

2.6.18:
C-Media PCI CMI8738-MC6 (model 55) at 0xd800, irq 11

00: 02 00 01 00
04: 50 1d 00 00
08: 03 00 09 00
0c: 00 00 01 08
10: c0 00 00 00
14: 00 00 80 00
18: 00 80 80 0c
1c: 00 00 fe ff
20: 10 40 08 00
24: 00 01 00 00
28: ff ff ff ff
2c: ff ff ff ff
30: 00 00 00 00
34: 00 00 00 00
38: 00 00 00 00
3c: 00 00 00 00

C-Media CMI8738 (model 55) at 0xd800, irq 11

00: 02 00 01 00
04: 10 1c 00 00
08: 03 00 09 00
0c: 00 00 01 08
10: c0 00 00 00
14: 00 00 00 00
18: 00 80 80 0c
1c: 00 00 fe ff
20: 10 40 08 00
24: 00 01 00 04
90: 20 09 00 00

Please let me know if you need further information.


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