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

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

-

-        DisplayLink Ubuntu Software Release Note

-

-Version: v5.6.0

-Build: posix/59-3268-g950879406d2 (176)

-

-Date: 28th April 2022

-

-Extensible Virtual Display Interface version included: v1.11.0-3 (39da217)

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

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

-

-

-A. Introduction

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

-

-This is DisplayLink Driver Software v5.6.0 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.  Changes in this release

-D.  Supported O/S variants

-E.  Release components

-F.  How to install

-G.  Supported features & hardware

-H.  Limitations & known issues

-I.  Future development

-

-C.  Bugs fixed in this release

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

-

-C.5  Changes in 5.6 release

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

-- Added preliminary support for kernel 5.18

-- Added support for Ubuntu 22.04

-- DL-6xxx series: Improve 10M/100M Ethernet performance of some devices (VIFR-994)

-- Fixed laggy video experience on machines with AMD GPUs on XServer (PS-1828)

-- Improved stability of connection for some of DL-6xxx devices (PS-1820)

-- Improved installer experience (PS-1825)

-- DL-5xxx series: System shows unsupported 4kp60 mode on display modes list (PS-1780)

-- Fixed installation on Raspberry Pi 64bit (PS-1154)

-- Some laptops with DisplayLink driver stuck with black screen before log-in screen appears (PS-1808)

-- Fix kernel bugcheck in dma-buf on device plug-in (PS-1691)

-- Fixed drm device leaks on evdi module unload (PS-1839)

-

-C.4  Changes in 5.5 release

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

-- Added preliminary support for kernel 5.17

-- Community fixes for evdi kernel module

-- DL-6xxx series: update for RTL8211FD-VX and RTL8211E Ethernet PHYs (WS-1597)

-- DL-6xxx series: update for LAN LED behavior in some devices (VIFR-840, VIFR-802)

-- Fix displays blinking on device connect (PS-1674)

-- Mitigate problems with some DP monitors that are black on some DL-6xx0 devices (PS-1560)

-- Fix corruptions under cursor in X session on DL-3xx0 devices

-- Fix runit scripts for displayLink-driver daemon

-

-C.3  Changes in 5.5 beta release

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

-- Added support for kernel 5.14 and 5.15

-- Added preliminary support for kernel 5.16

-- Community fixes for evdi kernel module

-- DL-6xxx series: adding RTL8211FD-VX and RTL8211E Ethernet PHYs (WS1597)

-- DL-41xx: improved firmware flashing time, visible from following update onwards

-

-C.2  Changes in 5.4.1 release

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

-- Added support for kernel 5.13

-- Added beta support for kernel 5.14 beta (33194)

-- DL-6xxx series: improved 5120x1440 - 5K Super Ultrawide resolution selection (33186)

-- Improved performance: added support for damage regions interface from Linux DRM interface (26378)

-- Improved performance in Wayland session with AMD GPU machines (33151)

-- DL-6xxx series: fixed blinking mouse cursor while moving across displays (32987)

-

-C.1  Changes in 5.4.0 release

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

-- Added support for kernel 5.11 and 5.12

-- DL-6xxx series: added support for nVidia G-SYNC monitors

-- DL-6xxx series: added 5K Ultrawide (5120x1440 @ 60 Hz) display support

-- Other reliability improvements

-

-

-D. Supported O/S variants

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

-

-This release has been prepared to be compatible with Ubuntu 22.04, 21.10, 20.04, 19.04 and 18.04.

-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 i686, amd64, armv7 and aarch64 architectures.

-Supported Linux Kernel version range is from 4.15 to 5.17.

-Minimum supported Xorg version is 1.16, minimum supported Mutter (Wayland) version is 3.32.

-

-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 i686, amd64, armv7 and aarch64 platforms.

-Source code for the open-source components can be found at Synaptics' DisplayLink 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 Synaptics.

-

-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

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

-

-Synaptics 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.