[Bug 86274] New: If client PC(note guest OS)'s audio driver is disabled, Spice's Lip-Sync function is of no use.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86274

            Bug ID: 86274
           Summary: If client PC(note guest OS)'s audio driver is
                    disabled, Spice's Lip-Sync function is of no use.
           Product: Spice
           Version: unspecified
          Hardware: All
                OS: Windows (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: spice-gtk
          Assignee: spice-bugs at lists.freedesktop.org
          Reporter: djeum at e-trons.co.kr

guest os: windows 7 professional 32 bit (or 64bit)
client: VirtViewer 0.5.6 or any version.
client os: windows 7 Profession 32bit (or 64bit)

Client PC environment : A desktop PC with Realtek audio chip and don't connect
any headphone and Speaker in audio jack. This will make the PC's sound function
disabled( not mute)
(If you want to test your windows os notebook, just set to audio driver "don't
use" in Device Manager.)

Reproducing Step:

1. Make set upper environment to your PC

2. With  virt-viewer 0.5.6 (or any version) , connect SPICE KVM VM (guest OS :
windows 7).

3. Play any movie with any player.

4. Movie screen display is not progressing, just stoped . 

Reproducible : 100%

Expected Function : 
         1. Check Client PC's audio device function.
         2. If audio is disabled, Spice protocol should don't use lip-sync     
function. Sever just should send Video Data to client PC without using lip-sync
function.

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