[Qemu-devel] [Bug 1246890] Re: AC97 sound card crashes QEMU

[John Arbuckle]

This problem also affects qemu-system-i386.

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https://bugs.launchpad.net/bugs/1246890

Title:
  AC97 sound card crashes QEMU

Status in QEMU:
  New

Bug description:
  The AC97 sound card does not work. It stops QEMU on startup. The cause
  appears to be some kind of deadlock.

  Steps to reproduce:
  Just add -soundhw ac97 to QEMU's arguments. Example: qemu-system-ppc -soundhw 
ac97

  The example above is all it takes to reproduce the problem.

  This problem has been observed on Mac OS X and Debian Linux.

  I question whether the ac97 support ever worked. It is a file that was
  taken from VirtualBox and added to QEMU. I do know that VirtualBox's
  support for the ac97 sound card works perfectly.

  The exact line of code that stops QEMU in its tracks is located in the
  file main-loop.c, in the function os_host_main_loop_wait(), the call
  made to qemu_mutex_lock_iothread(). The is where QEMU stops under Mac
  OS X.

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