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		DisplayLink Mac OS X Software Release Note

Version: 2.2 Beta (54265)
Date: 12 March 2014

DisplayLink DL-3x00 and DL-41xx Firmware Version: 8.7.13.61117
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A. Introduction
===============

This is DisplayLink Mac OS X Software v2.2 Beta Release.

This release delivers the following improvements
  * Support for a single DisplayLink screen on OS X 10.9
    - More screens can be connected but with severe limitations due to OS issues. See section H for details
  * Enhanced rendering quality on OS X 10.8 and 10.9
  * Bug fixes and compatibility improvements for all products

A full list of known issues can be found in the "Known Issues" section below.

More information on how to use this software can be found in the Mac OS X User Guide found on the DisplayLink website (http://www.displaylink.com/mac)


A1. Important notes about DL-3x00 and DL-41xx Firmware
======================================================

This software release contains an embedded firmware image.
DL-3x00 and DL-41xx devices will be automatically upgraded with this firmware upon connection if required.

The upgrade is silent, therefore screens connected to DL-3x00 or DL-41xx devices may require few seconds to appear for the first time.


B. Contents
===========

A.  Introduction
A1. Important notes about DL-3x00 and DL-41xx Firmware
B.  Contents
C.  Bugs fixed in this release
D.  Supported OSes
E.  Supported Mac Platforms
F.  Supported Hardware
G.  Language Support
H.  Limitations
I.  Common recovery steps
J.  List of known issues


C. Bugs fixed in this release
=============================

Some applications can show severe flickering on DisplayLink screens. Examples of applications that show this issue are Safari, QuickTime and the App store. This issue is resolved on 10.8 and 10.9 with up to one DisplayLink screen connected. (16107, 15777, 15764)

HTML5 and Flash content in Safari may flicker. This issue is resolved on 10.8 and 10.9 with up to one DisplayLink screen connected. (14723)

Corruption and freeze of the DisplayLink screen after replacing the monitor on the HDMI connection. (16460)

Blank DisplayLink screen on some systems. (16534, 16645)


D. Supported Operating Systems
==============================

The DisplayLink software can be installed on any Intel-based desktop or laptop Apple Mac computer running client versions of OS X Mavericks 10.9.2, OS X Mountain Lion 10.8.5, Mac OS X Lion 10.7.5, Mac OS X Snow Leopard 10.6.8.
At the time of writing these were the latest available versions of Mac OS X tested against: later OS versions might show compatibility issues.

USB 3 operation is not supported on Mac OS X Lion 10.7.x.

Mac OS X Mountain Lion versions older than 10.8.3 are not supported.

Mac OS X Leopard 10.5.x and Mac OS X Tiger 10.4.x are not supported by this driver version. Version 1.7.x is the last version to support these operating systems. Visit http://www.displaylink.com/mac to download this driver.


E. Supported Mac platforms
==========================

This software supports all Intel-based Macs.

***It does not support Power-PC based Macs.***


F. Language support
===================

The DisplayLink software installer is only available in English.


G. Supported Hardware
=====================

- DL-41xx devices are supported.
- DL-3x00 devices are supported.
- DL-1x5 devices are supported.
- DL-1x0 devices are supported.
- Kensington sd400v Office Dock with auto install is not supported.


H. Limitations
==============

OS X audio limitations
----------------------
OS X versions earlier than 10.8.5 do not support audio over USB 3.0 in DL-3x00 and DL-41xx based devices. For audio support, please use a USB 2.0 connection or upgrade to OSX 10.8.5 or later.


OS X graphics limitations
-------------------------
Mirror mode not kept after reboot/replug on OS X 10.8.5 and later. (16473)

No 3D (OpenGL) acceleration - some features of Mac OS X applications that require hardware OpenGL acceleration, such as Keynote presentations, will have limited functionality.

The internal screen is kept active while in clamshell mode on OSX systems with a single HD3000 graphics card.
    
On Mac OS X 10.6.x (Snow Leopard) it's not possible to screen capture the content of DisplayLink screens. This issue has been fixed by Apple in OS X 10.7.0.

Colour calibration does not work with DisplayLink enabled displays.
      
Note: Applications that require Quartz\OpenGL\hardware acceleration support will likely exhibit problems. Some problems can be avoided by making sure the DisplayLink display is not set to be the main display (the display with the menu bar).
If an application refuses to launch when a DisplayLink display is present, try to disconnect all the DisplayLink displays, then launch it and then reconnect the displays.


OS X 10.9 Mavericks limitations
-------------------------------
The Mavericks operating system up to the current version 10.9.2 does not correctly support more than one virtual framebuffer. This includes third party USB and wireless displays.

Display arrangement is not kept when using 2 or more DisplayLink displays. (16112)

Sometimes rotating one DisplayLink monitor rotates a different display. (16139)

Some applications can show corruption and/or missing contents while updating windows contents. Examples are Maps, iBooks and the Dock. (16365, 15855, 15778)

On 10.9 with more than one DisplayLink screen connected some applications can show severe flickering on DisplayLink screens. Examples of applications that show this issue are Safari, QuickTime and the App store. (16107, 15777, 15764)

All screens black and unusable after unplugging a DisplayLink screen. This is caused by Apple's Window server crashing. This can be recovered by replugging the DisplayLink device. (16155)

On the Retina Macbook Pro, changing the layout to mirror logs the user out. Again this is caused by Apple's Window server crashing. (16207)

Misplaced or missing menu items on DisplayLink screens. Changing the resolution of the external screen can sometimes resolve the issue. (16480, 16744)

On some systems fast user switching fails when DisplayLink screens are connected. (16153)

Sometimes when DisplayLink monitor is set as primary after waking up from sleep it is disconnected and there is no login screen visible. (16149)

Corruption on the screen may be visible while rotating DisplayLink displays (16151)


I. Common recovery steps
========================

Most of the issues can be resolved by replugging the DisplayLink device which exhibits the problem.

In very rare cases, the recovery requires rebooting.


J. Known Issues
===============

Garageband audio input not available with DL-3x00 devices. (16325)

Not all display modes are available for rotated DisplayLink screens. (13464)

On MacBooks with Retina display internal screens may get corrupted if screens are in mirroring mode. A workaround is to switch to extend. (15168)

Changing the monitor connected to a DL-1x0/DL-1x5 DisplayLink device may require the device to be unplugged and replugged for the new monitor to be correctly recognised.

Two DisplayLink monitors monitoring each other may sometimes cause corruption on main Mac's screen. (15633)

Screen corruption while mirroring multiple DisplayLink screens. (16121, 17077)

Desktop & Screensaver window is sometimes crashing when DisplayLink monitor is set as a primary display. (16122)

iTunes protected content not playing on DisplayLink screens on recent Mac models. (15013)

Flash content not rendered correctly with Chrome on OS X 10.6.x. (17075)

iTunes protected content not visible on built-in graphics when DisplayLink screens are connected. (17087)