No sound in linux guests since 5.0 (affects VMs created with 5.0, not updated from 4.x)

[Pulfer]

There's no sound in linux guests since 5.0. The issue affects only VMs created with 5.0, not updated from 4.x. It happens because VBox 5.0 introduced audio codec option which doesn't seem to work properly for AC97.

The workaround is either to set Intel HD Audio instead of AC97 as the default controller for all guest OS presets. Or to switch audio controller from AC97 to Intel HD Audio and back in VM settings (like suggested here  https://bbs.archlinux.org/viewtopic.php?id=202362 ). Switching audio controller removes codec option from VM settings so sound starts working properly.

[frank]

Should be fixed in the next 5.0.x maintenance release.

[frank]

Fix is part of VBox 5.0.10.