I am running an amd64 system with x11-base/xorg-server-1.5.3-r6. Changing the hostname of the system results in the following error message whenever you try to start a gui application. $ firefox Xlib: connection to ":0.0" refused by server Xlib: No protocol specified Error: cannot open display: :0.0 Going to a tty and changing the hostname back makes it work again. The problem occurs for me at work. I have set a hostname in /etc/conf.d/hostname but it gets somehow changed to something else through dhcp. $emerge --info Portage 2.1.6.11 (default/linux/amd64/2008.0/desktop, gcc-4.3.2, glibc-2.8_p20080602-r1, 2.6.28-gentoo-r5 x86_64) ================================================================= System uname: Linux-2.6.28-gentoo-r5-x86_64-Intel-R-_Core-TM-2_Duo_CPU_T5800_@_2.00GHz-with-glibc2.2.5 Timestamp of tree: Tue, 02 Jun 2009 13:45:02 +0000 ccache version 2.4 [enabled] app-shells/bash: 3.2_p39 dev-java/java-config: 2.1.7 dev-lang/python: 2.5.4-r2 dev-util/ccache: 2.4-r7 dev-util/cmake: 2.6.2-r1 sys-apps/baselayout: 1.12.11.1 sys-apps/sandbox: 1.6-r2 sys-devel/autoconf: 2.13, 2.63 sys-devel/automake: 1.5, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.2 sys-devel/binutils: 2.18-r3 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 1.5.26 virtual/os-headers: 2.6.27-r2 ABI="amd64" ACCEPT_KEYWORDS="amd64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ARCH="amd64" ASFLAGS_x86="--32" AUTOCLEAN="yes" CBUILD="x86_64-pc-linux-gnu" CCACHE_DIR="/var/tmp/ccache" CCACHE_SIZE="2G" CDEFINE_amd64="__x86_64__" CDEFINE_x86="__i386__" CFLAGS="-march=native -pipe" CFLAGS_x86="-m32" CHOST="x86_64-pc-linux-gnu" CHOST_amd64="x86_64-pc-linux-gnu" CHOST_x86="i686-pc-linux-gnu" CLEAN_DELAY="5" COLLISION_IGNORE="/lib/modules" COLORTERM="gnome-terminal" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/config" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c /etc/udev/rules.d" CVS_RSH="ssh" CXXFLAGS="-march=native -pipe" DBUS_SESSION_BUS_ADDRESS="unix:abstract=/tmp/dbus-AlmMrL89NC,guid=97c8d12879ff6f1dd9e4b1c94a276671" DEFAULT_ABI="amd64" DESKTOP_SESSION="gnome" DISPLAY=":0.0" DISTDIR="/usr/portage/distfiles" EDITOR="/bin/nano" ELIBC="glibc" EMERGE_DEFAULT_OPTS="--ask --verbose --tree --jobs 2 --keep-going" EMERGE_WARNING_DELAY="10" FEATURES="buildpkg ccache distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch" FETCHCOMMAND="/usr/bin/wget -t 5 -T 60 --passive-ftp -O "${DISTDIR}/${FILE}" "${URI}"" GCC_SPECS="" GDK_USE_XFT="1" GDMSESSION="gnome" GDM_LANG="de_DE" GDM_XSERVER_LOCATION="local" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" GNOME_DESKTOP_SESSION_ID="Default" GNOME_KEYRING_SOCKET="/tmp/keyring-VVJE1S/socket" GPG_AGENT_INFO="/tmp/seahorse-PnFUVi/S.gpg-agent:4487:1" GTK_MODULES="gnomebreakpad" GTK_RC_FILES="/etc/gtk/gtkrc:/home/mingramm/.gtkrc-1.2-gnome2" HG="/usr/bin/hg" HOME="/home/mingramm" INFOPATH="/usr/share/info:/usr/share/binutils-data/x86_64-pc-linux-gnu/2.18/info:/usr/share/gcc-data/x86_64-pc-linux-gnu/4.3.2/info" INPUT_DEVICES="evdev synaptics" JAVAC="/etc/java-config-2/current-system-vm/bin/javac" JAVA_HOME="/etc/java-config-2/current-system-vm" JDK_HOME="/etc/java-config-2/current-system-vm" KDEDIRS="/usr:/usr/local:/usr/kde/3.5" KERNEL="linux" LANG="de_DE" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LC_ALL="de_DE.utf8" LDFLAGS="-Wl,-O1" LDFLAGS_x86="-m elf_i386" LESS="-R -M --shift 5" LESSOPEN="|lesspipe.sh %s" LIBDIR_amd64="lib64" LIBDIR_amd64_fbsd="lib64" LIBDIR_ppc="lib32" LIBDIR_ppc64="lib64" LIBDIR_sparc32="lib32" LIBDIR_sparc64="lib64" LIBDIR_x86="lib32" LIBDIR_x86_fbsd="lib32" LINGUAS="de" LOGNAME="mingramm" LS_COLORS="rs=0:di=01;34:ln=01;36:hl=44;37:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.pdf=00;32:*.ps=00;32:*.txt=00;32:*.patch=00;32:*.diff=00;32:*.log=00;32:*.tex=00;32:*.doc=00;32:*.aac=00;36:*.au=00;36:*.flac=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36:" MAKEOPTS="-j3" MANPATH="/etc/java-config-2/current-system-vm/man:/usr/local/share/man:/usr/share/man:/usr/share/binutils-data/x86_64-pc-linux-gnu/2.18/man:/usr/share/gcc-data/x86_64-pc-linux-gnu/4.3.2/man:/etc/java-config/system-vm/man/:/usr/kde/3.5/share/man:/usr/qt/3/doc/man" MULTILIB_ABIS="amd64 x86" MULTILIB_STRICT_DENY="64-bit.*shared object" MULTILIB_STRICT_DIRS="/lib32 /lib /usr/lib32 /usr/lib /usr/kde/*/lib32 /usr/kde/*/lib /usr/qt/*/lib32 /usr/qt/*/lib /usr/X11R6/lib32 /usr/X11R6/lib" MULTILIB_STRICT_EXEMPT="(perl5|gcc|gcc-lib|binutils|eclipse-3|debug|portage)" NETBEANS="apisupport cnd groovy gsf harness ide identity j2ee java mobility nb php profiler soa visualweb webcommon websvccommon xml" OPENGL_PROFILE="nvidia" ORBIT_SOCKETDIR="/tmp/orbit-mingramm" PAGER="/usr/bin/less" PATH="/usr/local/bin:/usr/bin:/bin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.3.2:/usr/kde/3.5/bin:/usr/qt/3/bin:/usr/games/bin:/home/mingramm/maple12/bin" PKGDIR="/usr/portage/packages" PKG_CONFIG_PATH="/usr/qt/3/lib64/pkgconfig" PORTAGE_ARCHLIST="ppc s390 amd64 x86 ppc64 x86-fbsd m68k arm sparc sh mips ia64 alpha hppa amd64-fbsd sparc-fbsd" PORTAGE_BINHOST_CHUNKSIZE="3000" PORTAGE_BIN_PATH="/usr/lib64/portage/bin" PORTAGE_COMPRESS_EXCLUDE_SUFFIXES="css gif htm[l]? jp[e]?g js pdf png" PORTAGE_CONFIGROOT="/" PORTAGE_DEBUG="0" PORTAGE_DEPCACHEDIR="/var/cache/edb/dep" PORTAGE_ELOG_CLASSES="log warn error" PORTAGE_ELOG_MAILFROM="portage@localhost" PORTAGE_ELOG_MAILSUBJECT="[portage] ebuild log for ${PACKAGE} on ${HOST}" PORTAGE_ELOG_MAILURI="root" PORTAGE_ELOG_SYSTEM="save_summary echo" PORTAGE_FETCH_CHECKSUM_TRY_MIRRORS="5" PORTAGE_FETCH_RESUME_MIN_SIZE="350K" PORTAGE_GID="250" PORTAGE_INST_GID="0" PORTAGE_INST_UID="0" PORTAGE_PYM_PATH="/usr/lib64/portage/pym" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_RSYNC_RETRIES="3" PORTAGE_TMPDIR="/var/tmp" PORTAGE_VERBOSE="1" PORTAGE_WORKDIR_MODE="0700" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/portage/local/layman/science /usr/portage/local/layman/sunrise /usr/portage/local/layman/lisp /usr/local/portage" PROFILE_ONLY_VARIABLES="ARCH ELIBC KERNEL USERLAND" PWD="/home/mingramm" QMAKESPEC="linux-g++" QTDIR="/usr/qt/3" RESUMECOMMAND="/usr/bin/wget -c -t 5 -T 60 --passive-ftp -O "${DISTDIR}/${FILE}" "${URI}"" ROOT="/" ROOTPATH="/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.3.2:/usr/kde/3.5/sbin:/usr/kde/3.5/bin:/usr/qt/3/bin" RPMDIR="/usr/portage/rpm" SANE_CONFIG_DIR="/etc/sane.d" SESSION_MANAGER="local/fewslaptop:@/tmp/.ICE-unix/4112,unix/fewslaptop:/tmp/.ICE-unix/4112" SGML_CATALOG_FILES="/etc/sgml/sgml-docbook.cat:/etc/sgml/openjade-1.3.2.cat:/etc/sgml/xml-docbook-4.4.cat:/etc/sgml/sgml-ent.cat:/etc/sgml/xml-docbook-4.1.2.cat:/etc/sgml/sgml-docbook-3.1.cat:/etc/sgml/sgml-lite.cat:/etc/sgml/dsssl-docbook-stylesheets.cat" SHELL="/bin/bash" SHLVL="1" SSH_AGENT_PID="4131" SSH_AUTH_SOCK="/tmp/keyring-VVJE1S/ssh" STAGE1_USE="multilib nptl nptlonly unicode" SYMLINK_LIB="yes" SYNC="rsync://rsync7.de.gentoo.org/gentoo-portage" TERM="xterm" USB_DEVFS_PATH="/dev/bus/usb" USE="X acl acpi alsa amd64 avahi bash-completion berkdb bluetooth branding bzip2 cairo cdr cli cracklib crypt cups dbus dri dvd dvdr dvdread emboss encode evo fam firefox fortran gdbm gif gnome gpm gstreamer gtk hal iconv ieee1394 isdnlog jpeg ldap libnotify mad midi mikmod mmx mp3 mpeg mudflap multilib nautilus ncurses nls nptl nptlonly nsplugin ogg opengl openmp pam pcre pdf perl png ppds pppd python qt3support quicktime readline reflection sdl session spell spl sse sse2 sse3 ssl ssse3 startup-notification svg sysfs tcpd threads tiff truetype unicode usb vorbis xml xorg xulrunner xv zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="de" USERLAND="GNU" VIDEO_CARDS="nvidia nv" USER="mingramm" USERLAND="GNU" USERNAME="mingramm" USE_EXPAND="ALSA_CARDS ALSA_PCM_PLUGINS APACHE2_MODULES APACHE2_MPMS CAMERAS CROSSCOMPILE_OPTS DVB_CARDS ELIBC FCDSL_CARDS FOO2ZJS_DEVICES FRITZCAPI_CARDS INPUT_DEVICES KERNEL LCD_DEVICES LINGUAS LIRC_DEVICES MISDN_CARDS NETBEANS_MODULES QEMU_SOFTMMU_TARGETS QEMU_USER_TARGETS USERLAND VIDEO_CARDS" USE_EXPAND_HIDDEN="CROSSCOMPILE_OPTS ELIBC KERNEL USERLAND" USE_ORDER="env:pkg:conf:defaults:pkginternal:env.d" VIDEO_CARDS="nvidia nv" WINDOWID="50332866" WINDOWPATH="7" XAUTHORITY="/home/mingramm/.Xauthority" XDG_DATA_DIRS="/usr/share:/usr/kde/3.5/share:/usr/local/share" _="/usr/bin/emerge"
Created attachment 193479 [details] Xorg.0.log AUDIT: Thu Jun 4 08:44:16 2009: 3894 X: client 25 rejected from local host ( uid=1000 gid=1009 pid=5554 )
It's a known behavior of X. You should instruct your dhcp client not to fiddle with the hostname. Thanks
