[wdmaudiodev] Re: audiodg.exe hangs while system is shutting down on Windows 8.1
- From: Dhaval Kavar <dkavar47@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Thu, 24 Jul 2014 12:20:13 +0530
Hi Matthew,
We have sent you dump file with required information.
Please let us know if you need more information.
Regards,
Dhaval
On Wed, Jul 23, 2014 at 6:49 PM, Matthew van Eerde <
Matthew.van.Eerde@xxxxxxxxxxxxx> wrote:
> Hmm…. can you create a dump file of audiodg.exe in the hung state, and
> send it to me off-list?
>
>
>
> 1. Set the DisableProtectedAudioDg registry key as described here:
> http://msdn.microsoft.com/en-us/library/windows/hardware/ff538609(v=vs.85).aspx
>
> 2. Reboot (or just *net stop audiosrv* and *net start audiosrv*) so
> the key change takes effect
>
> 3. Get into the hung state (*net stop audiosrv* should take the
> place of shutting down so you can still interact with the computer)
>
> 4. Go into Task Manager | More details | Details | Find the
> audiodg.exe process | Right-click | Create dump file
>
>
>
> Symbols for your APO .dll would also help.
>
>
>
> *From:* wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:
> wdmaudiodev-bounce@xxxxxxxxxxxxx] *On Behalf Of *Dhaval Kavar
> *Sent:* Tuesday, July 22, 2014 11:48 PM
> *To:* wdmaudiodev@xxxxxxxxxxxxx
> *Subject:* [wdmaudiodev] audiodg.exe hangs while system is shutting down
> on Windows 8.1
>
>
>
> Hi All,
>
> We are developing an APO for Input devices.
>
> For echo cancellation, we use Loop-back feature and we use similar method
> as described in:
> *http://msdn.microsoft.com/en-us/library/windows/desktop/dd370800%28v=vs.85%29.aspx
> <http://msdn.microsoft.com/en-us/library/windows/desktop/dd370800%28v=vs.85%29.aspx>*
>
> To capture the render audio data, we have a thread in APO.
>
> We are facing issues on Windows 8.1 OS (both 32bit and 64bit) that happen
> in below use case:
> a. Start Windows Sound Recorder. This will load our Input APO (MFX on
> Windows 8.1 or LFX on Windows 7) in memory under audidg.exe.
> b. Shutdown the Windows OS.
>
> When system is getting shutting down, input APO gets APO::UnlockForProcess
> and then we make a call to IAudioClient -> Stop method. But, IAudioClient
> -> Stop method hangs! This is issue 1.
>
> IAudioClient -> Stop executes in a capture thread and we wait for the
> thread to complete its task. Because capture thread is already in hung
> state WaitForSingleObject on thread handle times out. Then we release the
> objects that we hold and IAudioCaptureClient -> Release hangs too. This is
> issue number 2.
>
> *Some consequences that we saw on above hangs are as follows:*
> Because audiodg.exe is in hung state, System does not shutdown properly
> and "System" process (process ID: 4) makes the system to Sleep. We observe
> this behavior via Event Viewer application where we can see an Event ID 42
> is added with "The system is entering sleep. Sleep Reason: Application API"
> description.
>
> When we start the machine again, it starts in the same state where
> audiodg.exe is in hung state! So, we cannot use input or output device
> anymore unless we kill audiodg.exe and restart the audio services again.
>
> *More analysis:*
> We saw that when we make IAudioClient -> Stop method call,
> IAudioSessionEvents::
>
> OnStateChanged -> AudioSessionStateInactive gets called on Windows 7 while
> system is shutting down. But, same method does not executed on Windows 8.1!
>
> Any help or idea on how to solve these issues would be much appreciated.
>
> Regards,
> Dhaval
>
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