[Bug 194804] New: [sound] [snd_hda]Creative SB0880 X-Fi: changing play.vchanformat causes system freeze

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194804

            Bug ID: 194804
           Summary: [sound] [snd_hda]Creative SB0880 X-Fi: changing
                    play.vchanformat causes system freeze
           Product: Base System
           Version: 10.1-RC2
          Hardware: amd64
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: d.akiyakov at gmail.com

Created attachment 149016
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=149016&action=edit
system info

Hello, I'd like to submit a bug, which happens with me from 9-stable, as I
remember. Bug occurs on Creative SB0880 X-Fi device.

# pciconf -lv -a hdac2
hdac2 at pci0:6:0:0:       class=0x040300 card=0x00421102 chip=0x000b1102 rev=0x04
hdr=0x00
    vendor     = 'Creative Labs'
    device     = 'X-Fi Titanium series [EMU20k2]'
    class      = multimedia
    subclass   = HDA

The system information is in attachment.

The problem happens when I switch dev.pcm.7.play.vchanformat: s16le:2.0 to
s16le:5.1. After this switching system freezes if I run any sound in any
application. Only reset button helps. Also, must say, internal sound card on
motherboard works fine with play.vchanformat:s16le:5.1.

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