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Anyone knows how to troubleshoot this issue?

: VBox_HotAudioNotResponding.png (27.64 KiB) Viewed 24808 times

How about reading the last sentence in the error message?

Y E T I wrote:How about reading the last sentence in the error message?

I'm not the OP, but I have this same problem. The only audio error I'm seeing in the logs is concerning opening up the input devices(mic and line-in). I don't understand why it's trying to open these exclusively anyway.

00:00:03.905 Audio: Trying driver 'dsound'.
00:00:04.014 DSound: Could not initialize DirectSoundCapture
00:00:04.016 Audio: set_record_source ars=0 als=0 (not implemented)
00:00:04.017 AC97: WARNING: Unable to open PCM IN!
00:00:04.017 AC97: WARNING: Unable to open PCM MC!
00:00:04.017 VM: Raising runtime error 'HostAudioNotResponding' (fFlags=0x0)
00:00:04.017 Console: VM runtime error: fatal=false, errorID=HostAudioNotResponding message="Some audio devices (PCM_in, PCM_mic) could not be opened. Guest applications generating audio output or depending on audio input may hang. Make sure your host audio device is working properly. Check the logfile for error messages of the audio subsystem"

I've tried enabling and disabling exclusive access to the sound card in Windows 7 as well as running VirtualBox as an administrator. Nothing I've tried gets rid of this issue

I did not have this before 4.0.10... but since upgraded to 4.0.10 I am having this error too on my existing machines that were working fine.
upgraded now to 4.0.12 and still having this error. so I have no idea.
However... I can listen to guest sounds... so I don't know what this warning means.

I have the exact same problem and same error message
running Virtual Box 4.1.0, this is my first installation. Windows 7 Professional host OS, Windows 98 guest.
Tried installing the Guest Additions but received an error that they will not install on this version of windows (not sure if that referred to host or guest OS!)

thanks for any clues

00:00:02.241 NAT: value of BindIP has been ignored
00:00:02.242 Chipset cannot do MSI: VERR_NOT_IMPLEMENTED
00:00:02.242 Audio: Trying driver 'dsound'.
00:00:02.411 DSound: Could not initialize DirectSoundCapture
00:00:02.414 HDAcodec: can't open in fmt(freq: 44100)
00:00:02.417 HDAcodec: can't open out fmt(freq: 44100)
00:00:02.417 HDA: WARNING: Unable to open PCM IN!
00:00:02.417 VM: Raising runtime error 'HostAudioNotResponding' (fFlags=0x0)

I have seen this error very long time always when starting any guest on my W7 host. The log shows similar as shown in one of the previous messages.

I solved my problem this way:

I plugged my headphones + microphone onto the computer (there was none before) and now I do not see the error anymore!

I had the same problem. Plugged my earphones. Works like a dream now.

Just chiming in with a "I also have this issue". I had ported over two VMs from a Windows 10 host over to an OSX host, and all sound worked fine... Until I upgraded to VB 5.1.2, and now I get the sound error at boot (and subsequently, no sound) for both VMs.

I'm using El Capitan 10.11.6 as the host, and the VMs are Windows XP SP3 and Windows 7 SP1.

I have this issue too. I had installed WinXP VMs on iMac (VB 5.0.24) host and Windows 10 (VB 5.0.22) host, all sound worked fine. but when i installed VB 5.1.2 on MacAir (Host) EL Capitan 10.11.6, WinXP VM guest, i got alert "The virtual machine execution may run into an error condition as described below. We suggest that you take a appropriate action to avert the error".

When i downgraded from VB version 5.1.2 to 5.0.24, no waring message, and sound is back.

So you're using an OS X host and that's why you're posting in the Windows host section of the forum, did I get that right?

Yes, they both are. I'm not sure if I should simply point them to the OSX hosts discussion (Sound doesn't work on VB 5.1.2), to the bug reports (#15659, #15660) or if I should move their messages to the appropriate thread. I think I'll just point them for the moment...

seeing it on debian linux hosts too since 5.1.2

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Host Audio Not Responding?

Host Audio Not Responding?

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