RHN Errata Alert: qspice bug fix update

[Red Hat Network Alert <dev-null@rhn.redhat.com>]

Red Hat Network has determined that the following advisory is applicable to
one or more of the systems you have registered:

Complete information about this errata can be found at the following location:
     https://rhn.redhat.com/rhn/errata/details/Details.do?eid=9243

Bug Fix Advisory - RHBA-2009:1489-1
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Summary:
qspice bug fix update

Updated qspice packages that fix several bugs are now available.

Description:
The Simple Protocol for Independent Computing Environments (SPICE) is a
remote display protocol designed for virtual environments. SPICE users can
view a virtualized desktop or server from the local system or any system
with network access to the server. SPICE is available for a variety of
machine architectures and operating systems. SPICE is used in Red Hat
Enterprise Linux for viewing virtualized guests running on the KVM
hypervisor or on Red Hat Enterprise Virtualization Hypervisors.

These updated packages fix the following bugs:

* the SPICE server uses a heuristic method for detecting video streams.
Some sites, however, send two video frame pixmaps: the actual size of the
frame and a variant that measures from the top-left of the web-page
presenting the frame to the bottom-right of the video frame. Receiving two
video pixmaps caused the SPICE heuristic to fail to detect the video
stream. This failure also caused a dramatic increase in CPU use and network
traffic. With this update, the heuristic detects dual-pixmap video streams
accurately; video playback occurs as expected and CPU use and network
traffic no longer spike. (BZ#521791)

* previously the SPICE server used a fixed bit-rate for video streams. If
external factors affected the data stream, this fixed bit-rate resulted in
dropped frames and low quality playback. With this update, the SPICE server
no longer uses a hard-coded bit-rate; instead it can choose a bit-rate that
reflects current network conditions, improving video playback in
low-bandwidth conditions. (BZ#521792)

* on new client connections the SPICE server previously sent the client an
uncompressed initial screen image. In low bandwidth conditions this
resulted in a long period of apparent inactivity, with the client
presenting an unsuable black screen. The SPICE server now compresses the
initial screen image, greatly reducing initialization time. (BZ#522049)

Users requiring remote display capabilities for KVM hypervisors are advised
to upgrade to these updated qspice packages, which resolve these issues.
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Taking Action
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You may address the issues outlined in this advisory in two ways:

     - select your server name by clicking on its name from the list
       available at the following location, and then schedule an
       errata update for it:
           https://rhn.redhat.com/rhn/systems/SystemList.do

     - run the Update Agent on each affected server.


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Affected Systems List
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This Errata Advisory may apply to the systems listed below. If you know that
this errata does not apply to a system listed, it might be possible that the
package profile for that server is out of date. In that case you should refresh 
the system's package profile by running *one* of the following commands as root 
on that system:

 * 'up2date -p' (on Enterprise Linux systems prior to RHEL5)
 * 'rhn-profile-sync' (on Enterprise Linux 5 or later) 

There are 2 affected systems registered in 'Your RHN' (only systems for
which you have explicitly enabled Errata Alerts are shown).

Release   Arch       Profile Name
--------  --------   ------------


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