125 lines
5.6 KiB
Plaintext
125 lines
5.6 KiB
Plaintext
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=============================================================================
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=============================================================================
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DisplayLink Ubuntu Software Release Note
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Version: 1.2.65
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Date: 5th October 2016
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DisplayLink DL-5xxx, DL-3x00 Firmware Version: 9.0.37.80577
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DisplayLink DL-41xx Firmware Version: 9.0.37.80577
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Extensible Virtual Display Interface version included: 1.2.64
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=============================================================================
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=============================================================================
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A. Introduction
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===============
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This is DisplayLink Driver Software v1.2.1 for Ubuntu. It provides initial, production quality support for DisplayLink USB 3.0 devices on specific variants of desktop Ubuntu Linux.
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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.
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A1. Important notes about DL5xxx, DL-3x00 and DL-41xx Firmware
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=======================================================================
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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.
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The upgrade is silent, therefore screens connected to 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.
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B. Contents
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===========
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A. Introduction
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A1. Important notes about DL-5xxx, DL-3xxx and DL-41xx Firmware
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B. Contents
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C. Issues fixed
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D. Supported O/S variants
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E. Release components
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F. How to Install
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G. Supported Features & Hardware
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H. Limitations & Known issues
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I. Future Development
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C. Issues fixed
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===============
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Issues fixed since DisplayLink Driver Software v1.2 for Ubuntu (1.2.58)
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-----------------------------------------------------------------------
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Extensible Virtual Display Interface module is not compatible with Linux kernel 4.8. (23848)
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Issues fixed since DisplayLink Driver Software v1.1 for Ubuntu (1.1.62)
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-----------------------------------------------------------------------
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High CPU usage with no activity on DisplayLink monitor. (22444)
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Kernel warning in dmesg after connecting DisplayLink monitor. (22530)
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Segmentation fault could occur while stopping DisplayLink daemon. (22536)
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DisplayLink systemd/upstart service is only loaded when a DisplayLink device is connected. (23187)
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D. Supported O/S variants
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=========================
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This release has been prepared to be compatible with Ubuntu 16.04 and Ubuntu 14.04. Other variants and editions may be compatible if they meet minimum O/S requirements, but are not supported by DisplayLink.
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The Software contains binaries which work on Intel x86 platform (32 bit and 64 bit).
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Minimum supported Linux Kernel version is 3.16.
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Minimum supported Xorg version is 1.16.
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E. Release components
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=====================
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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.
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Source code for the open-source components can be found at DisplayLink's GitHub, https://github.com/DisplayLink
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F. How to Install
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=================
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To install the release, from a terminal window, with root permissions use the command:
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sudo ./displaylink-driver-XXXX.run
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Where displaylink-driver-XXXX.run is the name of the extracted DisplayLink driver.
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The dkms framework is required for installation of DisplayLink. This can be installed with the command: sudo apt-get install dkms
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More detailed information on installation can be found at http://support.displaylink.com/knowledgebase/articles/615714#ubuntu
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G. Supported Features & Hardware
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================================
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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.
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Resolutions up to 4K are supported on the appropriate DisplayLink hardware.
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Device families supported:
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- DL-5xxx
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- DL-41xx
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- DL-3xxx
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Support for DL-1x5 and DL-1x0 devices is provided by the open source udl driver.
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H. Limitations & Known issues
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=============================
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A list of limitations and known issues can be found here:
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http://support.displaylink.com/knowledgebase/articles/641668
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I. Future Development
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======================
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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.
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- 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.
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- 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.
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- 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.
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