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		DisplayLink Mac OS X Software Release Note

Version: 2.3 (58024)
Date: 10 October 2014

DisplayLink DL-5xxx, DL-3x00 and DL-41xx Firmware Version: 8.10.10.67106
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A. Introduction
===============

This is the first beta of DisplayLink Mac OS X Software v2.3 Release.

This release delivers the following improvements
  * 4K resolutions support
  * DL-5xxx support
  * DL-3950 support
  * New embedded firmware upgrade mechanism improving first connect user experience. Visible from future releases.
  * Support for a single DisplayLink screen on OS X 10.10
    - More screens can be connected but with limitations due to OS issues. See section H for details
  * Bug fixes and compatibility improvements for all products
  
This version does not support OS X version 10.6 and 10.7. See section E for details.

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 DL5xxx, DL-3x00 and DL-41xx Firmware
==============================================================

This software release contains an embedded firmware image.
DL-5xxx, DL-3xxx and DL-41xx devices will be automatically upgraded with this firmware upon connection if required.

The upgrade is silent, therefore screens connected to DL-5xxx, DL-3xxx or DL-41xx devices may require a few seconds to appear for the first time.


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

A.  Introduction
A1. Important notes about DL-5xxx, DL-3xxx 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
=============================

Issues fixed since version 2.2
------------------------------
The uninstaller cannot be started in OS X 10.9.5 and 10.10. (17859)

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

DisplayPort audio can become inactive after USB cable re-plugs. (17259)

Sometimes the DisplayLink device can fails to read EDID on resume from S3/S4. (17297)

Sometimes monitors connected to DisplayLink device remains blank after resuming from standby. (17453, 17353, 17554)

The Ethernet link should be off when DisplayLink device is disconnected from the host. (17018)

Monitor EDID was incorrectly interpreted, if the monitor id contained an underscore (_). (17606)

DisplayPort++ to DVI adapters can display incorrect available mode list. (17427)

Ethernet UDP performance might drop when playing video and audio over a DisplayLink device. (17579)

Monitor contents not refreshed after replugging USB during sleep. (17488) 


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 Yosemite Beta, OS X Mavericks 10.9.5, OS X Mountain Lion 10.8.5.
At the time of writing these were the latest available versions of Mac OS X tested against: later OS versions might show compatibility issues.

OS X versions earlier than 10.8.5 are not supported. Earlier versions of the DisplayLink software can be used:
 - Version 2.2 is the last version to support Mac OS Lion 10.7.x. and Mac OS X Snow Leopard 10.6.x.
 - Version 1.7.x is the last version to support Mac OS X Leopard 10.5.x and Mac OS X Tiger 10.4.x.
Visit http://www.displaylink.com/mac to download older drivers versions.


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

This software supports all Intel-based Macs compatible with OS X version 10.8.5 and later.

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


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

The DisplayLink software installer is only available in English.


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

- DL-5xxx devices are supported.
- DL-41xx devices are supported.
- DL-3xxx 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 graphics limitations
-------------------------
Mirror mode not kept after reboot/replug on OS X 10.8.5 and later. (16473)

Clamshell mode (built-in screen off while the lid is closed) requires a monitor to be connected to the Mac's built-in video output even if other DisplayLink screens are available.

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.
    
Colour calibration does not work with DisplayLink enabled displays.

iTunes protected content not visible on built-in graphics when DisplayLink screens are connected. (17087)
      
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 and 10.10 Yosemite limitations
--------------------------------------------------
Since Mavericks 10.9 and up to the latest 10.10 release tested, OS X does not correctly support virtual framebuffers. 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)

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)

Connecting one DisplayLink screen together with other virtual displays will result in corruption on the DisplayLink screen.

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)

In Yosemite some application windows can show corruption around the edges. (18064)

Some applications can show corruption and/or missing contents while updating windows contents. Examples are Maps, iBooks, the Dock and the menu bar. (16365, 15855, 15778, 17092)
The Dock issue has been resolved in Yosemite 10.10 (15778).

On the Retina Macbook Pro, changes to the desktop layout that include changes to the built-in monitor can log the user out. This is caused by Apple's Window Server crashing. (16207)

The Window Server crashes logging out the user during some full screen transitions, for example Show Desktop. (17240)

Misplaced or missing menu items on the DisplayLink screen. 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)

Since OS X 10.9.3, the desktop contextual menu is sometimes not available on DisplayLink screens. (17086) To avoid this issue:
 - Disable "Display have different spaces" option
 - In case "Display have different spaces" is active, temporarily move the dock to the extended screen at least once after connecting the DisplayLink screens
 
Endless stream of WindowServer "disabling OpenGL" log messages in Console.


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
===============

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 mirroring 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)

On some systems, unable to login after restarting while in mirror mode. (17095)