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-=============================================================================

-=============================================================================

-

-DisplayLink Ubuntu Software Release Note

-

-Version: 4.2.29

-Date: 23th Feb 2018

-

-DisplayLink DL-3xx0 / DL-5xx0 Firmware Version: 9.5.18.93117

-DisplayLink DL-41xx Firmware Version: 9.5.20.93215

-DisplayLink DL-6xxx Firmware Version: 9.5.18.93117

-Extensible Virtual Display Interface version included: 1.5.0-r2

-

-=============================================================================

-=============================================================================

-

-

-A. Introduction

-===============

-

-This is DisplayLink Driver Software 4.2.0 for Ubuntu. It provides production quality support for DisplayLink USB 3.0 devices on specific variants of desktop Ubuntu Linux.

-

-The driver enables video support for products using DisplayLink USB 3.0 technology. Standard native Ubuntu drivers provide support for DisplayLink audio and Ethernet interfaces.

-

-

-A1. Important notes about DL-6xxx, DL5xxx, DL-3x00 and DL-41xx Firmware

-=======================================================================

-

-This software release contains an embedded firmware image. DL-6xxx, 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-6xxx, DL-5xxx, DL-3xxx or DL-41xx devices may require a few seconds to appear when devices are connected for the first time, or after devices have been used on other platforms and OSes.

-

-B. Contents

-===========

-

-A.  Introduction

-A1. Important notes about DL-6xxx, DL-5xxx, DL-3xxx and DL-41xx Firmware

-B.  Contents

-C.  Issues fixed

-D.  Supported O/S variants

-E.  Release components

-F.  How to Install

-G.  Supported Features & Hardware

-H.  Limitations & Known issues

-I.  Future Development

-

-C. Issues fixed

-===============

-

-Issues fixed since DisplayLink Driver Software v4.1.0 for Ubuntu (4.1.9)

---------------------------------------------------------------------------

-

-Sometimes PC may become unresponsive when a DisplayLink display is connected. (27139)

-

-D. Supported O/S variants

-=========================

-

-This release has been prepared to be compatible with Ubuntu 17.10 and Ubuntu 16.04. Other variants and editions may be compatible if they meet minimum O/S requirements, but are not supported by DisplayLink.

-

-The Software contains binaries which work on Intel x86 platform (32 bit and 64 bit).

-Minimum supported Linux Kernel version is 3.16.

-Minimum supported Xorg version is 1.16.

-

-E. Release components

-=====================

-The Software consists of an open-source kernel mode driver (EVDI) with an accompanying library (libevdi), and a supporting binary application compatible with Intel x86 platform.

-Source code for the open-source components can be found at DisplayLink's GitHub, https://github.com/DisplayLink

-

-F. How to Install

-=================

-

-To install the release, from a terminal window, with root permissions use the command:

-

-sudo ./displaylink-driver-XXXX.run

-

-Where displaylink-driver-XXXX.run is the name of the extracted DisplayLink driver.

-

-The dkms framework is required for installation of DisplayLink. This can be installed with the command: sudo apt-get install dkms

-

-More detailed information on installation can be found at http://support.displaylink.com/knowledgebase/articles/615714#ubuntu

-

-G. Supported Features & Hardware

-================================

-

-This driver will support up to 2 displays connected to DisplayLink devices. More than 2 DisplayLink displays may work, but not supported or tested by DisplayLink.

-

-Resolutions up to 4K are supported on the appropriate DisplayLink hardware.

-

-Device families supported:

-- DL-6xxx

-- DL-5xxx

-- DL-41xx

-- DL-3xxx

-

-DL-1x5 and DL-1x0 devices use the open source udl driver, which is not developed or maintained by DisplayLink.

-

-H. Limitations & Known issues

-=============================

-

-A list of limitations and known issues can be found here:

-http://support.displaylink.com/knowledgebase/articles/641668

-

-I. Future Development

-======================

-

-DisplayLink are open to suggestions and feedback on improving the proposed architecture and will gladly review patches or proposals from the developer community. Please find a current list of areas we identify as requiring attention below.

-

-- In this release, the user mode driver service is running with root permissions. In future versions, we would like to reduce the privilege level required for this process – e.g. by using a separate low-privileged user and a separate group, to ensure the permissions needed for driving DisplayLink screens are as low as possible.

-

-- The communication between the EVDI kernel module and the wrapper libevdi library is not access-controlled or authenticated. This could be improved in future releases, making it harder to compromise the data EVDI is sending and receiving.

-

-- EVDI kernel module driver is currently a platform_driver, for multiple reasons; most importantly because virtual displays are not discoverable, i.e. cannot be enumerated at the hardware level. EVDI is also a generic device, not tied to any particular kind of device, transport layer or a bus.