After emerging world, which included an upgrade from pam 0.77 to 0.77-r1, startxfce4 would no longer work due to some problem with the DISPLAY variable. During the emerge and etc-update, changes were made to /etc/security/pam_env.conf which seem to have added an entry for setting DISPLAY, causing startxfce4 to fail but startx still works Reproducible: Always Steps to Reproduce: 1.emegre pam-0.77-r1 2.accept changes to /etc/security/pam_env.conf 3.startxfce4 Actual Results: X failed with error Expected Results: started xfce4 After commenting out the following line in /etc/security/pam_env.conf, startxfce4 resumed normal operation: # Set the DISPLAY variable if it seems reasonable # DISPLAY DEFAULT=${REMOTEHOST}:0.0 OVERRIDE=${DISPLAY} Portage 2.0.51-r3 (default-linux/x86/2004.2, gcc-3.3.4, glibc-2.3.4.20040808-r1, 2.6.9-gentoo-r1 i686) ================================================================= System uname: 2.6.9-gentoo-r1 i686 Mobile AMD Athlon(tm) 64 Processor 3200+ Gentoo Base System version 1.4.16 Autoconf: sys-devel/autoconf-2.59-r5 Automake: sys-devel/automake-1.8.5-r1 Binutils: sys-devel/binutils-2.14.90.0.8-r1 Headers: sys-kernel/linux-headers-2.4.21-r1 Libtools: sys-devel/libtool-1.5.2-r5 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-O3 -mcpu=athlon-xp -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" COMPILER="" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3/share/config /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O3 -mcpu=athlon-xp -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache distlocks sandbox sfperms" GENTOO_MIRRORS="http://gentoo.osuosl.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="3dnow X acl alsa apm arts avi berkdb bitmap-fonts cdr crypt cups dvdr encode ethereal f77 foomaticdb fortran gdbm gif gpm gtk gtk2 imlib innodb java jpeg libg++ libwww mad mikmod motif mpeg mysql ncurses offensive oggvorbis opengl oss pam pdflib perl png python qt quicktime readline samba sdl slang snmp spell ssl svga tcpd tiff truetype x86 xml xml2 xmms xv zlib"
Here is the error generated by running startsfce4 after PAM upgrade: /usr/bin/startxfce4: X server already running on display :0.0 xsetroot: unable to open display ':0.0' ... ...
*** This bug has been marked as a duplicate of 70585 ***
