flash animations may be less smooth than with the DL-Driver.
Maximizing USB Display Performance
When using 5 or more USB multiseat devices, it is best (where possible) to divide these devices over two
USB buses. Many mid-range or better motherboards have two built-in internal USB 2.0 buses. (You can
also add an additional USB 2.0 bus by purchasing and installing an appropriate PCI expansion card.
You can see how many "2.0 root hubs" you have and which USB devices are attached on which buses by
opening a terminal window and typing at the command prompt:
$ lsusb
USB-connected Station Hotplugging
With Userful MultiSeat 4.0, USB-connected stations are hotpluggable, meaning that USB connections can
plugged and unplugged on a running system without requiring a system reboot.
• Note: In rare cases, repeated hot-plugging of the USB Station may cause problems. If the USB
station does not re-initialize correctly, simply reboot the system.
Hotplugging Input Devices
If a USB keyboard or mouse (Note: PS/2 input devices are not hotpluggable) must be unplugged from the
USB multiseat device for more than 1.5 seconds to reset device assignment. The Press-F key utility will
start for device reassignment.
Hotplugging Stations
If a USB multiseat device is disconnected from the computer and reconnected within 10 seconds, the
session on that station will be resumed. If the disconnection is more than 10 seconds, the session will
be killed, and the login screen will be shown once the device is reconnected.
Running 3D Applications
Userful MultiSeat 4.0 offers 3D software rendering and therefore can run applications that do not require
hardware acceleration, such as Google Earth, K3DSurf and KSudoko. Please note that 3D graphics
performance improves with more powerful CPUs. For optimal performance, avoid simultaneously running
more 3D applications than the number of CPU cores in the host machine (i.e. a quad core CPU is best
suited to run a maximum of 4 simultaneous 3D applications).
Auto-login
Auto-login essentially allows some pre-determined user account to be logged into -- automatically -- when a
computer boots up. Be aware that because this eliminates the need for user sign-in IDs and passwords it
could pose a security risk in some multi-seat configurations.
However, the Auto-login feature is ideal for use with multi-seat kiosk arrangements, as any program can be
started automatically on any station.
To maintain system security and ensure administrator access, auto-login can only be used with stations
Copyright © 2010 Userful Corporation. All rights reserved.
Userful Multiplier™, Userful Desktop™, and the Userful Logo are trademarks of Userful Corporation. 26 of 33
Userful MultiSeat Linux™ 2011
User Guide
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