ThinLinc 4.4.0 Release Notes


A new ThinLinc release is finally here, version 4.4.0. It includes more than 80 enhancements. The most prominent features are:

  • Improved graphics performance.
  • An updated client for Mac OS X features 64-bit and sound support.
  • The setup program (tl-setup) now features an unattended mode.

Changes in This Release

In the list below, the bug number is given in parentheses. For more information, visit


  • ThinLinc works on most modern Linux distributions and Oracle Solaris (R). We recommend that you deploy ThinLinc on one of these tested platforms:

    • Red Hat (R) Enterprise Linux Server 7
    • SUSE (R) Linux Enterprise Server 12
    • Ubuntu Desktop (R) 14.04 (64-bit)
    • Oracle Solaris (R) 10

    Please note that ThinLinc is supported on any platform that fulfills our documented requirements. This includes distributions such as Oracle Linux 7, Linux Mint 17, and Debian 7.0.

    This is the last release with support for Oracle Solaris. Since every release is supported for 3 years, support for the Solaris platform, using ThinLinc 4.4.0, will be available until 2018. There are several options for migrating from a Solaris environment to a Linux based ThinLinc solution. Please contact us for more information. (3614)

  • Desktop environments are now started correctly on Ubuntu systems that use systemd. This primarily affects Ubuntu 15.04 and later, but can also be a problem on Ubuntu 14.10. (5512)

  • The setup program (tl-setup) now features an unattended mode, where answers can be read from a file. This makes it possible to automate installations using Puppet, CFEngine, and similar frameworks. (668)

  • The "tl-memberof-group" utility now accepts multiple groups. (5304)

  • The SSL 3.0 protocol is disabled by default. This affects Web Administration Interface and Web Access (HTML5 Client) services. This change has been done to reduce the risk of a POODLE (CVE-2014-3566) man-in-the-middle attack, although no such attacks against ThinLinc are currently known. (5306)

  • On some systems, such as Ubuntu 14.10, the "systemctl" command is installed but not functional. ThinLinc now avoids using "systemctl" on such systems. Additionally, we are using the required new method for restarting "AppArmor". (5324)

  • Several issues related to log rotation have been fixed. (5554, 5555)


  • In some cases, the graphics performance of ThinLinc 4.3.0 was reduced compared to earlier versions. This has been corrected. (5242)
  • The CPU usage of the JPEG encoder/decoder has been optimized. On average, the encoder/decoder is 40% faster. (5423)

Native Client

  • The Mac OS X client supports sound redirection. This means that sound redirection in the native client is now available on all operating systems. (2182)
  • The Mac OS X client is now a 64-bit application. This improves runtime performance, but also reduces the launch time and memory footprint on many systems where the ThinLinc client was the only 32-bit application. The client now requires Mac OS X version 10.6 or later. (5257)
  • The Mac OS X client is signed with an Apple certificate. Besides ensuring the client software integrity, the client is also accepted by the OS X "Gatekeeper", with the default OS X settings. (4369)
  • The previous client did not handle a public key file path which contained whitespace characters. This has been corrected. (4949)
  • It is now possible to use public key files with Windows newline characters. (5316)
  • The native client sets the _NET_WM_PID property. This resolves an issue with suspend on IGEL terminals. (5337)

HTML5 Client

  • It is now possible to "pan" a ThinLinc session using the HTML5 client running on a touch screen device, when the session is larger than the screen. (4846).
  • When using the previous HTML5 client with Internet Explorer, the mouse cursor was incorrect. This has been fixed. (5148)
  • The Super, Meta, and Windows keys now works in the HTML5 client. (5369)

Smart Card Support

  • The "tl-ldap-certalias" tool now works with python-ldap version 2.4. (4816).

Printing Support

  • Version 4.2.0 and 4.3.0 of the ThinLinc Client sometimes creates a large number of print jobs when printing a single document, when running on Windows. This has been corrected. A hotfix for 4.3.0 is available at (5366)
  • The "thinlocal" print queue can now transfer print jobs in parallel. This avoids that a client on a slow network link slows down print jobs for other clients. (1456)

Windows (R) Integration

  • SeamlessRDP now works with Internet Explorer running on Windows 2008 R2. (5251)

Corrected Issues

ThinLinc has also been enhanced in many other ways. The complete list of corrected issues is:

 505,  668, 1456, 2182, 2827, 3947, 4369, 4480, 4643, 4760, 4804,
4816, 4846, 4849, 4868, 4869, 4890, 4926, 4929, 4949, 5003, 5037,
5047, 5115, 5148, 5178, 5189, 5216, 5242, 5249, 5251, 5256, 5257,
5268, 5270, 5277, 5281, 5284, 5285, 5287, 5292, 5293, 5295, 5304,
5306, 5307, 5316, 5324, 5326, 5329, 5335, 5337, 5346, 5350, 5352,
5353, 5358, 5361, 5365, 5366, 5369, 5373, 5382, 5383, 5393, 5397,
5403, 5404, 5405, 5406, 5423, 5429, 5431, 5434, 5436, 5437, 5443,
5444, 5447, 5449, 5460, 5463, 5466, 5474, 5484, 5490, 5501, 5512,
5554, 5555,
Android is a registered trademark of Google, Inc.
Debian (R) is a registered trademark of Software in the Public Interest, Inc.
Firefox (R) is a registered trademark of The Mozilla Foundation.
IGEL is a registered trademark of IGEL Technology GmbH
Linux (R) is a registered trademark of Linus Torvalds.
Mac OS X is a registered trademark of Apple Computer, Inc.
Oracle (R) is a registered trademark of Oracle Corporation.
Red Hat (R) is a registered trademark of Red Hat, Inc.
Solaris (R) is a registered trademark of Oracle Corporation.
SUSE (R) is a registered trademark of SUSE LLC.
ThinLinc (R) is a registered trademark of Cendio AB.
Ubuntu (R) is a registered trademark of Canonical Ltd.
Windows (R) is a registered trademark of Microsoft, Inc.

Frequently Asked Questions

  • ThinLinc is packaged in subscriptions with a tiered pricing system. A higher number of subscriptions will give a lower price. The subscriptions can be purchased for different periods, 12, 36 and 60 month. A longer duration will give a greater price. The payment of the subscriptions is done in advance.

    The default rule is that the prices are set in accordance with the number of subscriptions that are purchased at the actual call off. Deviation from this can be eventually agreed if a roll-out plan can be committed in advance.

  • Every valid ThinLinc Subscription Agreement has a specific ID. Contact Cendio at and refer to your ID, and we will issue new user licenses for you.

  • Contact Cendio support team at And refer to your ThinLinc Subscription ID in your support request.

  • We will set up an evaluation account that gives the permission to receive support directly from our technical team. Cendio can also provide trial licenses for more than 10 users. Please contact directly.

  • Cendio wants to sponsor organizations where the business aims to make the world better. This means to help people, regions etc. that really need help. Please contact us a

  • Cendio offers a non-profit discount for organizations that fall under the definitions that can be found at the Please contact us at for pricing. 

  • Cendio will, in good time before expiration of the ThinLinc Subscriptions Agreement, send a reminder by email. The renewal process will follow the same routines that are used in a new or additional purchase.

  • Other set-ups are possible for bigger deals. Contact

  • Purchases can be done directly via invoice, web shop or by a reseller. Cendio is a Swedish and EU company with long experience from doing business with foreign organizations. If you have any questions or need support, please contact us at


  • Best functionality and performance will always be achieved by upgrading to the latest version, both on the server and client-side. A newer version on the client-side will always give a better user experience than a former version. Cendio’s ambition is to keep good compatibility and functionality between the different versions. Historically, good compatibility between versions has been 3-5 years.

  • A ThinLinc set-up consists of a server software, client software and user licenses.

    Server software

    The server software is the heart of ThinLinc installation and handles all sessions, desktop environments and generates the virtual desktop, workspace etc.

    User licenses

    To allow more than 10 sessions to connect access to the server software, user licenses need to be added into the server software. User licenses are bought from Cendio. Please note, when placing user licenses into the ThinLinc server, the counting starts from 0, not 10. In concrete, this means that you need to buy and install the number of user licenses that you need.

    Client software

    The client software is installed on the device that is used to connect to the server and provision the virtual desktop / workspace. If using the web access client, no local installation of client software is needed, the provisioning is generated via the web browser that is installed at the server.

  • It’s up to the licensee to decide who can connect into the server installation. The ThinLinc client software is free of charge and can be downloaded by everyone.

  • The licensing is per organization. There is no limitation on how the ThinLinc user licenses are distributed in the legal organization, as long as the number of consumed licenses don’t exceed the number of paid licenses. It’s allowed to move the user licenses, but not copy.

  • The license use can be seen in the status module, how to manage can be found at . ThinLinc will notify you when the limit of licenses has been reached, for detailed information see,

  • Both the ThinLinc server and client software are free to distribute. The user licenses are connected to a purchase and are not allowed to distribute. For more detailed information, see

  • A specific version of ThinLinc is supported 3 years from release date. After 3 years, Cendio can’t guarantee support.

  • The number of user licenses that will be delivered will be in accordance with the number of subscriptions that have been acquired by the customer. The user licenses are perpetual.

  • When adding user licenses into the ThinLinc server, the counting will start from zero. So if you require 200 users, you need to have 200 user licenses

  • You need to buy user licenses and install them in the ThinLinc server. The user licenses are received through buying ThinLinc subscriptions.

  • It’s easy to add new users into a current ThinLinc set-up. By purchasing additional subscriptions into your agreement, so will we issue additional user licenses.

  • Cendio will, after receiving a valid order, distribute user licenses via email for the latest version after a purchase. If the purchase is a renewal and the customers have already received the latest version, no user licenses will be delivered by default, updated licenses will be delivered on request in this case.

  • It’s possible to merge existing agreements. When doing a merge, the period shall be at least 12 months.

  • The default rule is that the prices are set in accordance with the number of subscriptions that are purchased at the actual call off. Deviation from this can be eventually agreed if a roll-out plan can be committed in advance.

  • The client software packages are free of charge.

  • The ThinLinc license is perpetual and will still work after the expiry date of the ThinLinc subscriptions.


  • Both as an individual and as an organization, it is not allowed to use the free version of ThinLinc if you have valid user licenses.

  • ThinLinc is free to use for up to 10 concurrent users for both individuals and organizations (on a group basis).

  • ThinLinc Subscriptions give the possibility to run more than 10 concurrent users per ThinLinc installation. It also gives technical support directly from Cendio and the right to get upgrades (new versions) for ThinLinc.

  • ThinLinc Premium Subscription gives prioritized answers, faster response time, and direct access to our qualified technical support via telephone service.

  • The free version of ThinLinc is limited to 10 concurrent users and is supported via the ThinLinc Community. The commercial version of ThinLinc is packaged in a so-called subscription and can be scaled for more than 10 users. The subscriptions also give the right to get professional support in ThinLinc directly from the Cendio technical team.

  • ThinLinc is free to use up to 10 users at the same time per individual or organization worldwide, without any obligations. The usage can be 10 installations with one user per each or one installation with 10 users. What matters is that the 10 users aren’t exceeded.

How can we help you?