ThinOS 9.1.1131 Merlin Image file for Dell Wyse 3040 Thin Clients

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This image is supported on Dell Wyse 3040 Thin Clients and is intended for customers who want to install the ThinOS 9.1.1131 Merlin Image.

Fixes & Enhancements

New and enhanced features:
- Supports broker connections such as Citrix Workspace App, VMware Horizon, Teradici PCoIP, Microsoft Windows Virtual Desktop, Microsoft Remote Desktop services, and Amazon WorkSpaces. You must install the corresponding application packages to enable connection brokers on ThinOS.
- Supports Imprivata ProveID Embedded and Identity Automation authentication types.
- Supports optimization of Unified Communications (UC) Solutions on VDI. The supported Unified Communications are Skype for Business, Cisco Jabber, Cisco Webex Teams, Cisco Webex Meetings, Zoom and Microsoft Teams.
- Ability to configure and maintain Jabra Xpress headset and EPOS Connect headset settings. You must install the corresponding application packages to enable the feature.
- Enhanced user interface with modern desktop and icons.
- Supports a local admin console called Admin Policy Tool.
- Supports Wyse Management Suite v3.1 and later.
- Notification messages are displayed when firmware or packages are deployed using Wyse Management Suite.
- Supports the installation of firmware and application packages using Admin Policy Tool.

Fixed issues from the previous ThinOS releases. For more information, see the latest Dell Wyse ThinOS 9.1 Release Notes at
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9.1.1131, 9.1.1131

Release date

08 Jan 2021

Download Type

Operating Systems


Operating System


Dell Technologies recommends applying this update during your next scheduled update cycle. The update contains changes to maintain overall system health. It ensures that the system software remains current and compatible with other system modules (firmware, BIOS, drivers, and software) and may include other new features.
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File Format: Firmware Images
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File Size: 554.04 MB
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Additional details

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- Do not power off your thin client until the installation is complete.
- If you are downgrading ThinOS 9.1 to ThinOS 8.6, or ThinOS 9.0 you must use the Dell Wyse USB Imaging Tool to install the ThinOS 8.x or 9.x image. Before you downgrade, ensure that you disable the secure boot option, and also clear Trusted Platform Module (TPM) or Platform Trust Technology (PTT) in BIOS. Else, ThinOS 9.0 resets to factory settings after each reboot.
- You can install only one Unified communication package at a time. For example, either one Cisco or one Zoom unified communication package can be installed at a time.
- Improved the Citrix keyboard language sync function.
- ThinOS 9.x supports Citrix Native Printer and Citrix Universal Print Driver (UPD) printing policies. However, Citrix UPD is limited to the PS printer class.
- Do not enable video call for Citrix unified communication optimization features on the Wyse 3040 Thin Client. Video call results in performance issues.
- PCoIP session under Teradici Access Cloud broker does not support audio or video device redirection due to Teradici limitation.
- You cannot boot into ThinOS 9.1 when you perform the following operations in BIOS setup: Disable onboard Network Interface Card (NIC), Trusted Platform Module (TPM), or Platform Trust Technology (PTT), or clear TPM or PTT.
- You cannot install ThinOS 9.0 application packages on ThinOS 9.1 due to certificate change.

For more information, see Important notes section in the latest Dell Wyse ThinOS 9.1 Release Notes at
2205 (9.3.1129)29 May 2022
9.1.610828 Feb 2022
9.1.506713 Dec 2021
9.1.423425 Oct 2021
9.1.312907 Sep 2021
9.1.210114 Apr 2021
9.0.402409 Nov 2020
Use the Dell Wyse USB Imaging Tool version 3.4 to install the ThinOS Merlin Image on your thin client. For information about installation instructions, see the Dell Wyse USB Imaging Tool version 3.4 User's Guide available on the supported hardware product pages at

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