[Fixed] VBox 6.0, sound on guest is choppy

[wyattbiker]

I am using Virtualbox 6.0 o Mac OS X High Sierra. Using ICH AC97 drivers. Installed Linuxmint, Ubuntu and Windows 7. In all cases the sound is really choppy. I even tried to use the Intel HD driver, I don't hear sound. How can I fix this?

P.S. No other issues running these guest OSes

[socratis]

ICH AC97 broke somewhere between 6.0.0 RC1 and Release. They're working on it.

In the mean time, try the HDA one. If you have a problem, focus on a single VM. We need to see a complete VBox.log, from a complete VM run, where the problem occurs:

• Start the VM from cold-boot (not from a paused or saved state) / Observe problem / Shutdown the VM (force close it if you have to).
• With the VM completely shut down (not paused or saved), right-click on the VM in the VirtualBox Manager and select "Show Log".
• Save only the first "VBox.log", ZIP it and attach it to your response. See the "Upload attachment" tab below the reply form.

[wyattbiker]

Attached. I am setup to use 4 CPUS and 8GB RAM. I also tried the single VM. Sound works but Linux is very slow.

[socratis]

00:00:01.720409 NumCPUs <integer> = 0x0000000000000004 (4)
00:00:01.854331 CPUM: Physical host cores: 4

You have assigned all your CPUs to the VM. The host is going to run low on resources, since VirtualBox cares about physical processors (cores), not logical ones (threads).

00:00:01.720664 [/Devices/ich9pci/0/] (level 3)
00:00:01.720665   Trusted <integer> = 0x0000000000000001 (1)

Can you please explain to me the reason why you chose the ICH9 experimental, OSX-only chipset? Not a good reason I bet. Please revert to PIIX3.

00:00:01.720690 [/Devices/ichac97/0/LUN#0/] (level 4)
00:00:01.720692   Driver <string>  = "AUDIO" (cb=6)

I thought I mentioned that ICH AC97 is broke and you should switch to HDA. You mentioned that you didn't have any sound. Interesting because all the Mint ones (17, 19) that I've tried I had no problem with the HDA one.

Can you make all the changes above and try again?

[wyattbiker]

Issue has been fixed in latest release
VirtualBox Graphical User Interface
Version 6.0.4 r128413 (Qt5.6.3). Thanks!

[socratis]

Great, thanks for the feedback. Marking as [Fixed].