HDX provides a high-definition user experience on any device, at any location. The articles in the Devices section describe these devices:
- Generic USB device
- Mobile and touch screen devices
- Serial devices
- Specialty keyboards
- TWAIN devices
Optimized vs. generic USB device
An optimized USB device is one for which Citrix Workspace app has specific support. For example, the ability to redirect webcams using the HDX Multimedia virtual channel. A generic device is a USB device for which there is no specific support in Citrix Workspace app.
By default, generic USB redirection can’t redirect USB devices with optimized virtual channel support unless put into Generic mode.
In general, you get better performance for USB devices in Optimized mode than in Generic mode. However, there are cases where a USB device doesn’t have full functionality in Optimized mode. It might be necessary to switch to Generic mode to gain full access to its features.
With USB mass storage devices, you can use either client drive mapping or generic USB redirection, or both, controlled by Citrix polices. The main differences are:
If both generic USB redirection and the client drive mapping policies are enabled and a mass storage device is inserted either before or after a session starts, it’s redirected using client drive mapping.
When these conditions are true, the mass storage device is redirected using generic USB redirection:
- Both generic USB redirection and the client drive mapping policies are enabled.
- A device is configured for automatic redirection.
- A mass storage device is inserted either before or after a session starts.
For more information, see http://support.citrix.com/article/CTX123015.
|Feature||Client drive mapping||Generic USB redirection|
|Enabled by default||Yes||No|
|Read-only access configurable||Yes||No|
|Encrypted device access||Yes, if encryption is unlocked before the device is accessed on the virtual session.||Citrix Virtual Desktops only|
Mixed DPIs with multi-monitors
Citrix Virtual Apps and Desktops environments do not support the use of different DPIs between monitors. You can verify the DPI (% scaling) using Windows Control Panel > Display options. If using a Windows 8.1 or Windows 10 client device, enabling the Let me choose one scaling level for all my displays option in the Windows Control Panel > Display options configures the monitors appropriately. For more information, see Knowledge Center article CTX201696.