System instability with NVIDIA driver (using kernel 2.6.11-rc3 or lower)
There is a known issue regarding system instability using NVIDIA video drivers with kernel 2.6.11-rc3 or
lower. If you experience random reboots or kernel panics using an NVIDIA driver, please ensure that your
kernel version is 2.6.11-rc3 or higher.
Multimedia keys on keyboards are not supported
Utilities that enable multimedia keys in Linux may not work when multiple keyboards are connected to the
system.
Userful MultiSeat 4.0: Known Issues
Onboard Audio Jack Sometimes Muted by Either AlsaMixer or PulseAudio
Occasionally it seems the audio on the onboard audio is not working, when in fact it has been muted by
either AlsaMixer or | PulseAudio. This issue is unpredictable and difficult to reproduce; we recommend that
if you are experiencing this problem you refer to AlsaMixer and PulseAudio documentation for how to adjust
settings with those applications.
By Default, the Userful Control Center Cannot be Opened Without a Network
Connection
If there is no network connection, the Userful Control Center will not open unless the browser is set to
"Offline Mode". There is no workaround for the Chrome browser. For Firefox, the workaround is:
1. Use Firefox as the default web browser.
2. If the computer is only occasionally without a network connection:
• Attempting to open the Control Center will cause Firefox to display a page asking the user
to switch to "Offline Mode". Follow the instructions on the page and the Control Center will
work as usual.
3. If the computer is regularly without a network connection, or if a more permanent fix is required:
• Enter about:config: in the address bar of Firefox. Scroll down the page to find
"toolkit.networkmanager.disable". Double-click the entry to change the value to "TRUE".
Full-screen Flash Video Requires Disabling Hardware Acceleration
Full-screen web-based Flash video (for example, while viewing YouTube videos) can cause Firefox to
crash or freeze. Flash video can be viewed in full-screen mode, at a reduced frame rate, by disabling
hardware acceleration in Flash.
Changes must be made for each user due to the way Flash settings are handled. For each user:
1. Right-click on the Flash application.
2. Select "Settings".
3. Go to the "Display" tab.
4. Un-check "Enable Hardware Acceleration".
Copyright © 2010 Userful Corporation. All rights reserved.
Userful Multiplier™, Userful Desktop™, and the Userful Logo are trademarks of Userful Corporation. 29 of 33
Userful MultiSeat Linux™ 2011
User Guide
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