Administrator Guide

Enable UDP audio in a Citrix session
Citrix recommends that you use audio over User Datagram Protocol (UDP) in low-bandwidth network connections for better
audio quality. ThinOS does not support UDP audio over Citrix ADC (formerly NetScaler) due to Linux Citrix Workspace app
limitation.
Steps
1. Start the Admin Policy Tool on your ThinOS 9.0-based device or open the ThinOS 9.x Policy settings in Wyse
Management Suite.
If you are using the Admin Policy Tool on ThinOS, you must first select the audio quality as Medium and then enable UPD
audio. UPD audio is automatically disabled when you select the audio quality as High on Admin Policy Tool. However, the
UPD audio is not automatically disabled when you are configuring the setting using Wyse Management Suite. UPD audio may
not work if you set the audio quality as High using Wyse Management Suite.
2. On the Advanced tab, expand Session Settings, and click Citrix Session Settings.
3. In the Basic Settings section, click the Enable UPD Audio toggle key to ON state.
4. From the Audio Quality drop-down list, select Medium.
If you are using the Admin Policy Tool on ThinOS, you must first select the audio quality as Medium and then enable UPD
audio. UPD audio is automatically disabled when you select the audio quality as High on Admin Policy Tool. However, the
UPD audio is not automatically disabled when you are configuring the setting using Wyse Management Suite. UPD audio may
not work if you set the audio quality as High using Wyse Management Suite.
Keyboard layout synchronization in VDA
In Citrix Workspace app, the Keyboard Dynamic synchronization mode functions differently on a Linux client from a Windows
client. In general, on a Linux client, the keyboard output follows the client keyboard layout, which is different from the Windows
VDA layout. If a Linux client keyboard is synchronized to a Windows VDA, users may observe unpredictable keyboard output.
Also, in dynamic synchronization mode, Citrix Workspace app for Linux does not support VDA users to switch the keyboard
layout inside a VDA session.
In the server default mode, both Linux and Windows use the session (VDA) side keyboard layout with predictable output. You
can configure the keyboard layout mode using either Wyse Management Suite or Admin Policy Tool. The keyboard layout that
you select on the thin client is not automatically synchronized in the VDA session. ThinOS supports the server default mode that
enables VDA users to select or switch the keyboard layout inside the VDA session using the Windows Input Method Editor (IME)
language bar. For other modes such as Specific keyboard, Client Setting, or Dynamic Sync, there can be unpredictable mismatch
in the keyboard output if you switch the keyboard layout in VDA. This is because the Citrix Workspace app Linux keyboard sync
mode does not support switching the layout in VDA.
As a VDA administrator, you must configure the VDA desktop with the required keyboard language layout options. The IME
language bar must be enabled on the Windows lock screen. The VDA user can select the appropriate keyboard language layout
on the Windows lock screen.
In scenarios such as opening a new application in a VDA session, locking, or unlocking the VDA session, the keyboard layout falls
back to the VDA default layout. For example, EN_US. This is a known issue for a Linux client in the server default mode.
You can customize VDA registry settings for a consistent keyboard layout in the VDA session.
● For a desktop operating system VDA, the feature is enabled by default.
● For a server operating system VDA, you can enable the feature using the system registry.
1. In the system registry of VDA, go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard
Layout.
2. Create a DWORD entry IgnoreRemoteKeyboardLayout=1.
By default, the IgnoreRemoteKeyboardLayout entry is unavailable. The default keyboard is set to ENG, irrespective
of the Control Panel setting.
For example, open an application, lock, or unlock the session, the keyboard is set to ENG. To resolve this issue, ensure
that you set IgnoreRemoteKeyboardLayout=1.
For information about the Keyboard Layout Modes and Keyboard Layout rules in Citrix Workspace app, see the Citrix Virtual
Apps and Desktops keyboard and IME configurations article at www.citrix.com/blogs.
Configuring connection brokers
79