5. Click on the "Close" button.
These settings will be kept until changed by the user, even after rebooting the system.
Multimedia Keyboards and USB-video Devices with Network Cards Limit the Number of
Stations Possible
Multimedia keyboards (which have special keys to access the internet, music and other computer
functions) register with computer systems as a number of separate "event devices", thus limiting the
number of event devices available for multiseat stations. To achieve the maximum number of connected
stations, avoid using multimedia keyboards.
Input Devices (Keyboards, Mice) Randomly Stop Working When Running More Than 8
USB Stations Plus Onboard Station
This is due to a limitation on event devices in the kernel. If these problems are experienced when using an
8+1 (or larger) system, the a custom Userful-patched kernel is required. Please see Appendix C of the
User Guide for more details, including download and installation instructions for the Userful-patched kernel.
Session Lock Feature Disabled to Avoid Blocking Input Device Manual Assignment
Screen
Session Lock is a security feature available on some Linux distributions; when the system is idle long
enough for the screensaver to appear, the user's password will be required to re-open the session.
However, with Userful MultiSeat 4.0, on the rare occasion that a station loses keyboard/mouse device
assignment and then the screensaver turns on, the authentication dialog box will block access to the Press-
F-Key screen. Therefore, for Userful MultiSeat 4.0 the Session Lock feature has been disabled as a
workaround.
Note: Users created after Userful MultiSeat is installed will not benefit from the workaround until they have
logged in, logged out and logged back in once; until then the Session Lock feature will be available to those
users.
Rarely, USB-connected Monitors Lose the Signal and Go Blank
Certain USB multiseat devices occasionally lose their signal and go blank. This seems to be caused when
fluctuations in the USB signal prompt the system to switch the device to the USB 1.1 protocol (which does
not support USB-video devices due to insufficient bandwidth). It may also occur when USB multiseat
devices are hotplugged rapidly. The workaround:
1. Unplug the USB multiseat device from the computer.
2. Wait for 45-60 seconds to allow your session to reset (please note you will lose any unsaved work)
3. Replug the USB multiseat device into the computer and re-login.
Copyright © 2010 Userful Corporation. All rights reserved.
Userful Multiplier™, Userful Desktop™, and the Userful Logo are trademarks of Userful Corporation. 30 of 33
Userful MultiSeat Linux™ 2011
User Guide
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