﻿id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
16667	"ALSA: Failed to open ""default"" as output device: No such file or directory"	mrbumpy409		"Today my VirtualBox package was upgraded from version 5.1.18-114002~Ubuntu~xenial to 5.1.20-114628~Ubuntu~xenial. Now when I try to launch a virtual machine with the host audio driver set to ""ALSA Audio Driver"", I get an error message from VirtualBox with the following details:

{{{
No audio devices could be opened. Selecting the NULL audio backend with the consequence that no sound is audible.

Error ID: 
HostAudioNotResponding
Severity: 
Warning
}}}

The log file (attached) shows:

{{{
00:00:00.839799 ALSA: Failed to open ""default"" as input device: No such file or directory
00:00:00.840590 ALSA: Failed to open ""default"" as input device: No such file or directory
00:00:00.841414 ALSA: Failed to open ""default"" as output device: No such file or directory
00:00:00.842197 ALSA: Failed to open ""default"" as output device: No such file or directory
}}}

This is happening on both of my linux systems. Here are their details:

**System 1:**
* OS: KDE Neon 5.9.4 64-bit (Plasma Desktop 5.9.4, KDE Frameworks 5.33.0, Qt 5.7.1)
* CPU: Intel Core i7 930 (2.8 GHz quad-core)
* RAM: 12GB DDR3
* Video: NVIDIA GeForce GTX 970 w/ 4GB RAM (PCI Express)
* Sound Card 1: Sound Blaster Audigy 2 ZS Gold
* Sound Card 2: Echo Gina3G
* Linux Kernel: 4.8.0.46-generic
* NVIDIA video driver: 375.39

**System 2:**
* OS: KDE Neon 5.9.4 64-bit (Plasma Desktop 5.9.4, KDE Frameworks 5.33.0, Qt 5.7.1)
* PC: HP Pavilion m6-1035dx
* CPU/GPU: AMD A10-4600M APU with Radeon HD 7660G Graphics (using xorg radeon driver)
* RAM: 6GB DDR3 800 MHz
* Linux Kernel: 4.8.0.46-generic
"	defect	closed	audio	VirtualBox 5.1.20	fixed	alsa		other	Linux
