What’s new
What’s new in 2511
Support for Debian 12.12, Debian 13.1, RHEL9.7, Rocky Linux 9.7, and SLES 15.7
The Linux VDA now supports the following Linux distributions:
- Debian 12.12
- Debian 13.1 (Note: MCS provisioning is currently not available due to Samba limitation in Debian 13; HDX 3D pro is currently not available due to GPU driver limitation)
- RHEL 9.7
- Rocky Linux 9.7
- SUSE Linux Enterprise Server 15.7
For more information about supported Linux distributions, see System requirements.
Support RHEL & Rocky Linux 10 （Preview）
With the release of RHEL and Rocky Linux 10, there is a major shift from the traditional X Window System (X.Org) to Wayland as the default display server protocol.
The Linux VDA now supports (preview) the following Linux distributions:
- RHEL 10
- Rocky Linux 10
See limitations of RHEL and Rocky Linux 10 preview
Support disabling optional Linux VDA services
This feature allows optional Linux VDA services to be disabled via /etc/xdl/disablelist.conf, giving it higher priority than policy and local registry settings.
To disable a service, uncomment it from the configuration file after installing Linux VDA package.
Support for USB Redirection on Azure Virtual Machines
With this release, we are pleased to announce USB redirection support for Azure virtual machines running Canonical Ubuntu 22.04 and 24.04. As these platforms do not include certain USB kernel drivers by default, we now provide a flexible solution that enables you to compile and load the required kernel driver modules for specific USB devices.
For more details refer to USB Device Redirection
HDX Screen Sharing improvements
Starting with this release, Linux VDA introduces two key enhancements to HDX Screen Sharing:
- Shorter invitation codes for easier sharing and quicker session initiation
- Audit logging info in System log to track and review Screen Sharing activity for improved security and compliance
For more information, see Screen sharing improvement
HDX Screen sharing for Director
HDX Screen sharing is available for shadowing using Citrix Director for Citrix Virtual Apps and Desktops on-premises installations and Citrix Monitor for Citrix Cloud deployments. HDX Screen sharing is the new method for shadowing and provides a native, low latency alternative to the current shadowing. It requires both Citrix Director and Linux VDA from CR 2511 and later versions. For more information, see Using HDX screen share
Cross session clipboard exchange support (preview)
This feature involves the ability to copy content from one session to another through the common Client host but without actually saving that content on the client host machine. The tech-preview release of this feature will obtain the list of formats to be tunneled through the CrossSessionClipboard from a VDA RegKey. The value is a list of formats to be tunneled across CSC.
Example:
/opt/Citrix/VDA/bin/ctxreg create -k
"HKLM\System\CurrentControlSet\Control\Citrix\wfshell\Virtual Clipboard\CrossSessionClipboard" -t
"REG_MULTI_SZ" -v "CrossSessionFormats" -d
"CF_TEXT\0CF_BITMAP\0CF_DIB\0CF_UNICODETEXT\0CFX_FILE\0\0" —force
Enhanced TCP Congestion Control
Starting with this release, an enhanced TCP Congestion Control is provided for improving in session video and audio performance under high latency network. It’s by default off, the TCP congestion control method remains system default.
opt/Citrix/VDA/bin/ctxreg create -k "HKLM\System\CurrentControlSet\Control\Terminal Server\Wds\icawd\HdxPerformance" -t "REG_DWORD" -v "EnhancedTcpCongestionEnabled" -d "0x00000001" —force
Improve user experience with TCP transport for audio redirection
Starting with 2511 in Tech Preview, audio quality enhancer is also available for connections over reliable transport (i.e. TCP and EDT-Reliable). Under poor network conditions, both audio playback and recording will have a smoother experience with reduced latency.
Audio Quality Enhancer for reliable transport (preview)
Starting with 2511 in Tech Preview, audio quality enhancer is also available for connections over reliable transport (i.e. TCP and EDT-Reliable). Under poor network conditions, both audio playback and recording will have a smoother experience with reduced latency.
Support Service Continuity for connectionless workloads
Service Continuity enables end users to maintain access to business critical workloads during service disruptions. With this new feature, Service Continuity now supports Linux dedicated VDI workloads in connectorless resource locations. This includes AD joined and Non-domain joined workloads. For more information, please refer to Service Continuity.
Support caching the CGS FQDN IP address
The Linux VDA Rendezvous V2 now supports caching the CGS FQDN IP address after the first successful DNS lookup. If DNS becomes temporarily unavailable, connections can fall back to the cached IP. This feature is disabled by default.
To enable it, run /opt/Citrix/VDA/bin/ctxreg create -k "HKLM\Software\Citrix\Ica\EdgeNodeCache" -t "REG_DWORD" -v "EnableDNSCache" -d "0x00000001" —force
Support FAS info transmission through FAS launch ticket v2
This feature enables transmission of FAS server FQDN and port through the FAS launch ticket v2. The Linux VDA decodes this information directly from the ticket, eliminating the need for a registry entry on the VDA
PVS IPv6 support
This release supports pure IPv4, pure IPv6, and dual-stack deployments that use overlapping IPv4 and IPv6 networks. For details, please refer to the documentation IPv4/IPv6 supportThis release supports NVMe disks for vmware.
AOT Log Collection and Upload
Starting with this release, Linux VDA supports collecting and uploading AOT logs to a centralized log server, enabling improved troubleshooting across Citrix components.
For more details, refer to AOT Log Collection
What’s new in earlier releases
For new features included in the releases that shipped after the 1912 LTSR through the 2507 LTSR, see What’s new history.
In this article
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What’s new in 2511
- Support for Debian 12.12, Debian 13.1, RHEL9.7, Rocky Linux 9.7, and SLES 15.7
- Support RHEL & Rocky Linux 10 （Preview）
- Support disabling optional Linux VDA services
- Support for USB Redirection on Azure Virtual Machines
- HDX Screen Sharing improvements
- HDX Screen sharing for Director
- Cross session clipboard exchange support (preview)
- Enhanced TCP Congestion Control
- Improve user experience with TCP transport for audio redirection
- Audio Quality Enhancer for reliable transport (preview)
- Support Service Continuity for connectionless workloads
- Support caching the CGS FQDN IP address
- Support FAS info transmission through FAS launch ticket v2
- PVS IPv6 support
- AOT Log Collection and Upload
- What’s new in earlier releases