RHEA-2011:1602 - Product Enhancement Advisory

Topic

Updated xorg-x11-server and tigervnc packages that fix multiple bugs and add
various enhancements are now available for Red Hat Enterprise Linux 6.

Description

The xorg-x11-server packages provide the X.Org sample implementation of a server
for the X Window System. It provides the rendering services necessary for
graphical user environments, such as GNOME and KDE.

The tigervnc packages provide a TigerVNC remote display system, which allows
users to manage graphical applications on remote machines.

The xorg-x11-server packages have been upgraded to upstream version 1.10.4,
which provides a number of bug fixes and enhancements over the previous version.
(BZ#506345)

In addition, this update fixes the following bugs:

• Due to a problem in the gnome-screensaver application that caused screen

resume failures, the X server was set to stop proxying the lid state in output
connectivity. As a consequence, when using certain configurations, such as a
dual head setup with span mode, the screen configuration was not changed to use
only the external screen on the laptop lid close. With this update, the problem
with gnome-screensaver has been resolved, and X server has been modified to
inspect the lid state again. When the laptop lid is closed, the laptop display
is disconnected and the screen configuration is changed to use only the external
monitor. When the laptop lid is open, the screen configuration returns to the
dual head setup using span mode. (BZ#740581)

• The /usr/bin/xvfb-run script incorrectly used the undefined tempfile variable

instead of the mktemp command when creating a temporary directory for an X
authorization file. The script was not able to create the directory and
therefore failed to start Xvfb (X virtual framebuffer). The xvfb-run script now
works as expected using mktemp. (BZ#693793)

• The X server did not respect screen limits properly. Therefore, the mouse

cursor could be moved outside the visible areas of the screen. Screen limits are
now respected by the X server, and the cursor can no longer leave the visible
areas of the screen. (BZ#734262)

• The X server did not recognize the lid state correctly if a laptop with

attached external display booted with the lid closed. Therefore, the Gnome
Display Manager's login dialog did not appear on the external screen. With this
update, the X server recognizes the lid as closed, and the login dialog now
displays on the external screen in the scenario described. (BZ#740190)

• Under certain circumstances, a user's keyboard and key mappings could go out

of sync if the mappings were modified with the xmodmap utility. With this
update, the underlying code has been fixed, and modified key mappings can now be
used as expected. (BZ#664484)

• The panning feature did not work correctly with X Resize, Rotate and Reflect

Extension (RandR) when CRTC cursor confinement was enabled. As a consequence,
users were not able to move the mouse pointer beyond the visible part of the
screen although certain inaccessible regions were within the panning area. With
this update, RandR has been modified to disable CRTC cursor confinement when
panning is enabled. The panning feature now works as expected. (BZ#655212)

• When the XChangePointerControl() function was called by a driver after a

device was removed from the system, the function tried to dereference the
pointer to already freed memory. As a consequence, the X server terminated with
a segmentation fault. The X server does not call this function anymore and
crashes no longer in the situation described. (BZ#664927)

• Pointer events were not handled correctly when switching screens using the

PointerKeys feature with multi-head ATI or NVIDIA graphics cards. This caused
the X server to terminate unexpectedly. With this update, events handling has
been modified and the X server no longer crashes under these circumstances.
(BZ#734969)

All users of xorg-x11-server and tigervnc are advised to upgrade to these
updated packages, which fix these bugs and add these enhancements.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 655212 - RandR 1.3 panning doesn't work
• BZ - 664484 - xmodmap Mode_switch gets stuck on
• BZ - 664927 - server crash after removing device
• BZ - 684256 - X server calls memcpy with overlapping regions
• BZ - 688738 - [Cantiga] Xorg crashing after visiting specific youtube page
• BZ - 693793 - tempfile instead of mktemp in /usr/bin/xvfb-run
• BZ - 694552 - Failing to build xserver if systemtap-sdt-devel is installed
• BZ - 734262 - X server, limiting the cursor to the visible portions of the screen
• BZ - 734969 - Server crashes when switching ScreenRecs with PointerKeys
• BZ - 740190 - gdm in dualhead when notebook lid is closed
• BZ - 740581 - Closing/Opening laptop lid in dual head doesn't change screen conf.
• BZ - 746926 - Xorg segfault when running etracer on RV100

CVEs

(none)

References

(none)