===============================================================================
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DisplayLink Software Release: External Release Note
Software Package: DisplayLink Graphics
Product Version: 7.4.51587.0
Product Date: 11th October 2013
DisplayLink Core Software Version: 7.4.51572.0
DisplayLink Core Software Date: 7th October 2013
DisplayLink DL-3x00 Firmware Version: 8.4.11.57553
DisplayLink DL-41xx Firmware Version: 8.4.11.57553
===============================================================================
===============================================================================

A. Introduction
===============
This is R7.4M2, the second maintenance release of R7.4. It has been put through
a full system test and is suitable for deployment to end-users.

DisplayLink Software Release R7.4M2 delivers the following improvements:
- Improved application compatibility in Windows 8.1
- Improved Ethernet performance and stability
- Additional translations for all languages
- Critical bug fixes

DisplayLink Software Release R7.4 delivers the following improvements:
- Support for Windows 8.1
- Allow 2nd video output of DL-3900 products when a high resolution DisplayPort
  display is connected
- Critical bug fixes and compatibility improvements for all products


For further support and information about DisplayLink software, please visit
http://www.displaylink.com/support


A1. Important notes about DL-3x00 and DL-41xx Firmware
======================================================
This software release contains an embedded firmware image. DL-3x00/DL-41xx
devices will be automatically upgraded with this firmware upon connection.


B. Contents
===========
A. Introduction
A1. Important notes about DL-3x00 and DL-41xx Firmware
B. Contents
C. New features
C1. Fixed issues since R7.4 (7.4.50415.0)
D. How to Install and Use
E. Supported Operating Systems
F. PC Recommended Specifications
G. Language Support
H. Supported Hardware
I. Known Issues and Limitations


C. New features
===============
DisplayLink Software Release R7.4M2 delivers the following improvements:
- Improved application compatibility in Windows 8.1
- Improved Ethernet performance and stability
- Additional translations for all languages
- Critical bug fixes

DisplayLink Software Release R7.4 delivers the following improvements:
- Support for Windows 8.1
- Allow 2nd video output of DL-3900 products when a high resolution DisplayPort
  display is connected
- Critical bug fixes and compatibility improvements for all products


C1. Fixed issues since R7.4 M0 (7.4.50415.0)
--------------------------------------------
Lenovo X1 Carbon system shows corruption for 3 seconds resuming from hibernation. (16078)

Long delay to extend a DisplayLink screen on some PCs with Windows 8.1. (16095)

Blue screen in Ethernet driver while sending oversized Ethernet packets. (16250)

Memory leak in Ethernet driver. (16196)

Windows Media Center frozen while in full screen on Windows 8.1. (15479)

DisplayLink devices may not work on some systems with Etron USB 3.0 host
controller. (15736)

Blank display with some full screen applications in Windows 8.1. (15838)

Blank DisplayLink screens on some nVidia Optimus systems. (15986, 16254, 16007)

Error message "dlumd11.dll is either not designed to run on Windows or it contains an error" displayed on some systems after installation. (16271)

Ethernet connection reliability issues. (15879, 16330, 16270, 15942, 16170)

Ethernet not reliable at 10Mbps. (15661)

Device not resuming reliably enumerating on the USB bus after sleep or hibernate. (16285)

On Windows7 in Basic Mode when resuming from sleep the mouse cursor
may be not visible. (15055)

DL-41xx products can enter test mode during normal operation. (15862)

On some platforms, the HDMI monitor is still an image after the dock is
disconnected from the PC. (15827)

Quality of DisplayLink screen sometimes drops suddenly resulting in a corrupted 
image. (16187)


D. How to Install and use
=========================
Please find detailed guidance and information about how to install and use this
software in the DisplayLink Software User Guide: http://kb.displaylink.com/298

Corporations can apply for a corporate install version at 
www.displaylink.com/corporateinstall

For further support and information about DisplayLink software, please visit 
http://www.displaylink.com/support


E. Supported Operating Systems
==============================
This release can be installed on the following operating systems:

    - Windows XP SP2 (32-bit edition only)
    - Windows XP SP3 (32-bit edition only)
    - Windows Vista SP1 (32-bit and 64-bit editions)
    - Windows Vista SP2 (32-bit and 64-bit editions)
    - Windows 7 (32-bit and 64-bit editions)
    - Windows 8 (32-bit and 64-bit editions)
    - Windows 8.1 (32-bit and 64-bit editions)
    - Windows Server 2008 (32-bit and 64-bit editions)
       (This OS has received limited testing)
    - Windows Server 2008 R2
       (This OS has received limited testing)

Windows 2000 SP4 is supported by older versions of the DisplayLink software:
http://www.displaylink.com/downloads

Video: video is supported in extend mode with most popular video players on
Windows XP - Windows 8.1. 


Installation on Windows Server is enabled, but untested. End users may try to
use DisplayLink on server editions, but these are not supported configurations.


F. PC Recommended Specifications
================================
Please find detailed information about the minimum and recommended system
specifications needed to run this software in the DisplayLink
Software User Guide: http://kb.displaylink.com/298


G. Language Support
===================
Please find the complete list of languages supported by this software in the
DisplayLink Software User Guide: http://kb.displaylink.com/298


H. Supported Hardware
=====================
Devices supported:
- DL-41xx
- DL-3100 / DL-3500 / DL-3700 / DL-3900
- DL115 / DL125 / DL165 / DL195
- DL120 / DL160 


I. Known Issues and Limitations
===============================
System behaviour with DisplayLink attached screens has been well tested.
Testing covers plug/unplug, mode changes, playing video, hibernate,
sleep/standby, multiple users, different user rights, attached screen as
primary screen, attached screen as only screen, and other aspects.

Some use cases may exhibit minor issues, general troubleshooting
recommendations are:
- detach then reattach the DisplayLink device's USB cable
- change display settings using DL-GUI
- change display settings using WDP
- ensure you have the latest graphics drivers installed for your system GPU

For information about specific issues please see the DisplayLink support
knowledgebase: http://www.displaylink.com/support/knowledgebase.php
