Enable Isochronous USB Devices in VMware Player

Configure VMware Player USB 2.0 or USB 3.0 compatibility for webcams, audio devices, modems, and other time-sensitive USB peripherals.

Isochronous USB devices send or receive time-sensitive data at a regular pace. Examples include webcams, USB speakers, audio interfaces, and some modems. To use these devices inside a VMware Player virtual machine, configure the virtual machine's USB controller with a compatibility level supported by both the virtual hardware and the guest operating system.

What is an isochronous USB transfer?

An isochronous USB transfer is a USB transfer type intended for data that depends on consistent timing and delivery. It is commonly used for audio and video streams, where maintaining a regular flow is more important than retransmitting every individual packet.

For example, a webcam continuously sends video frames, while a USB audio device continuously sends or receives samples. If the virtual machine does not provide a suitable USB controller, the guest may fail to use the device or may experience unreliable audio, video, or communications.

In VMware Player, enabling support for these devices is primarily a virtual machine USB-controller configuration task. The controller presented to the guest must use a USB compatibility level that the virtual machine hardware and guest operating system support.

Devices that may use isochronous transfers

Webcams: stream video into the guest operating system.
Speakers and USB audio devices: stream audio to or from the guest.
USB audio interfaces: provide time-sensitive recording or playback.
Modems: some models use time-sensitive USB communication.

Choosing USB 2.0 or USB 3.0 does not guarantee that a device will work. Functionality also depends on the guest operating system, an appropriate guest driver, application support, and whether the physical device is attached to the virtual machine instead of remaining attached to the host.

Host, guest, and virtual USB hardware

The host operating system runs VMware Player and is connected to the physical USB device. The guest operating system is installed inside the virtual machine. The guest does not automatically receive every USB capability available on the host; it receives the virtual USB controller configured for that VM.

A USB controller is the virtual hardware component that provides USB connectivity to the guest. Its USB Compatibility setting determines the USB controller standard exposed to the guest. Therefore, host-side USB availability and guest-side USB-controller compatibility are separate requirements:

The host must be able to access the physical device.
The virtual machine must contain a USB controller.
The selected controller standard must be supported by the VM hardware compatibility level.
The guest operating system and its drivers must support that standard and device.
The device must be connected to the guest through VMware Player.

USB compatibility requirements

Virtual machine hardware compatibility is the virtual hardware generation assigned to a VM. It controls which virtual devices and features are available. USB 3.0 has more restrictive requirements than USB 2.0.

USB compatibility option	Minimum virtual machine hardware compatibility	Historical guest operating system requirement	When to choose it
USB 2.0	Workstation 6 or later virtual machine hardware	The guest must support USB 2.0	Use when the VM and guest support USB 2.0, especially when USB 3.0 is unavailable or unnecessary.
USB 3.0	Workstation 8 or later virtual machine hardware	Linux kernel 2.6.35 or later, or Windows 8	Use only when both the VM hardware and guest meet the USB 3.0 requirements.

These guest versions are historical compatibility conditions associated with the USB 3.0 option. A guest that does not meet them may not offer, recognize, or operate correctly with the virtual USB 3.0 controller.

Open the virtual machine settings

Select the target virtual machine in the VMware Player library.
Open Player > Manage > Virtual Machine Settings.
On the Hardware tab, locate the USB Controller device.

The virtual machine should be configured as the target VM, not as a global VMware Player setting. USB compatibility applies to the selected virtual machine.

Configure the USB controller compatibility

In the virtual machine hardware list, select USB Controller.
Find the USB Compatibility setting.
Choose USB 2.0 or USB 3.0, provided the requirements for that option are met.
Apply or save the virtual machine hardware settings.

The selected value determines which virtual USB controller standard VMware Player presents to the guest. It does not change the physical connector or upgrade the host's hardware. It changes the USB interface that the guest operating system detects.

Example: an older VM using USB 2.0

Suppose a virtual machine uses Workstation 6-or-later hardware compatibility, but its guest does not meet the USB 3.0 conditions. Select USB 2.0 in the USB Controller settings. A webcam or USB audio device can then be tested with the appropriate guest driver and application.

Example: an eligible USB 3.0 VM

Suppose a VM uses Workstation 8-or-later virtual hardware and runs Windows 8 or a Linux guest with kernel 2.6.35 or later. Select USB 3.0 if the device and guest drivers support it. If the option is missing or the guest cannot use it, fall back to USB 2.0 when supported.

Add a USB controller if it is missing

A virtual machine needs a USB Controller device before its USB compatibility can be configured. If no USB Controller entry appears on the Hardware tab, add one through the virtual machine hardware settings.

Open the target VM's Player > Manage > Virtual Machine Settings window.
Use the hardware settings workflow to add a device.
Select USB Controller and complete the add-hardware process.
Select the new USB Controller and set its USB Compatibility level.

For a detailed device-addition workflow, see Add a USB Controller. You can also review Configure a USB Controller for controller-specific settings.

Attach and verify the USB device

Start or resume the guest operating system as appropriate.
Connect the physical USB device to the virtual machine through VMware Player rather than leaving it attached only to the host.
Wait for the guest operating system to detect the device.
Install or confirm the appropriate guest driver.
Test the device in a guest application: preview video from a webcam, play or record audio, or test communications for a modem.

A device appearing in the host does not prove that the guest has access to it. Use VMware Player's USB connection controls to transfer the device to the VM. For the attachment procedure, see Connect a USB Device to a Virtual Machine.

Troubleshooting

Symptom	Likely cause	Suggested check
USB 3.0 option unavailable	The VM does not use Workstation 8-or-later virtual hardware, or the guest does not meet the historical USB 3.0 support conditions.	Check the VM hardware compatibility level and guest eligibility. Use USB 2.0 when USB 3.0 requirements are not met.
No USB Controller item in Virtual Machine Settings	The VM was created without a USB controller.	Add a USB controller, then select its USB compatibility level.
Device is visible on the host but not the guest	The device remains attached to the host, the guest lacks a suitable driver, or the controller setting is unsupported.	Connect the device to the VM, confirm guest driver support, and verify the controller compatibility setting.
Webcam or audio device is detected but does not function correctly	Isochronous-capable controller configuration, guest driver support, application support, or required USB level may be incomplete.	Review the USB compatibility selection, guest driver, device attachment state, guest application, and VM hardware compatibility.

Use a lower compatibility level when necessary

If USB 3.0 is unavailable or unreliable, select USB 2.0 when the guest supports it. This is appropriate for an older VM, an ineligible guest, or a device whose guest driver is designed for USB 2.0.

Quick checklist

The VM has a USB Controller device.
The VM hardware compatibility level supports the selected USB standard.
The guest operating system supports that USB standard.
The guest has a suitable device driver and application.
The physical device is connected to the VM, not only to the host.
The guest detects the device and its audio, video, or communications function works.

For broader context, review What Is a Guest Operating System and Configure a Virtual Machine for Compatibility.