RHBA-2013:0381 - Bug Fix Advisory

Topic

Updated gdm packages that fix four bugs and add two enhancements are now
available for Red Hat Enterprise Linux 6.

Description

The gdm packages provide the GNOME Display Manager (GDM), which implements the
graphical login screen, shown shortly after boot up, log out, and when
user-switching.

This update fixes the following bugs:

• Previously, the gdm_smartcard_extension_is_visible() function returned "TRUE"

instead of the "ret" variable. Consequently, the smartcard login could not be
disabled in the system-config-authentication window if the pcsd package was
installed. With this update, gdm_smartcard_extension_is_visible() has been
modified to return the correct value. As a result, the described error no longer
occurs. (BZ#616755)

• When GDM was used to connect to a host via XDMCP (X Display Manager Control

Protocol), another connection to a remote system using the "ssh -X" command
resulted in failed authentication with the X server. Consequently, applications
such as xterm could not be displayed on a remote system. This update provides a
compatible MIT-MAGIC-COOKIE-1 key in the described scenario, thus fixing this
incompatibility. (BZ#704245)

• Previously, X server audit messages were not included by default in the X

server log. Now, those messages are unconditionally included in the log. Also,
with this update, verbose messages are added to the X server log if debugging is
enabled in the /etc/gdm/custom.conf file by setting "Enable=true" in the "debug"
section. (BZ#738462)

• Previously, after booting the system, the following message occurred in the

/var/log/gdm/:0-greeter.log file:

gdm-simple-greeter[PID]: Gtk-WARNING: gtkwidget.c:5460: widget not within a
GtkWindow

With this update, this warning is no longer displayed. (BZ#820058)

In addition, this update adds the following enhancements:

• With this update, GDM has been modified to allow smartcard authentication when

the visible user list is disabled. (BZ#719647)

• Previously, the GDM debugging logs were stored in the /var/log/messages file.

With this update, a separate /var/log/gdm/daemon.log file has been established
for these debugging logs. (BZ#834303)

All users of gdm 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/knowledge/articles/11258

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 i386
• 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 x86_64
• 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 - 820058 - gdm-simple-greeter[PID]: Gtk-WARNING: gtkwidget.c:5460: widget not within a GtkWindow
• BZ - 867981 - gdm doesn't start when connecting to localhost using gdm via XDMCP

CVEs

(none)

References

(none)