Is it just me or does Xorg/Gnome seem slow and clunky to any other desktop users once the 6.7 upgrade is done? $ uname -a Linux CentOS501.homegroannetwork 2.6.32-573.1.1.el6.x86_64 #1 SMP Sat Jul 25 17:05:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux $ cat /etc/centos-release CentOS release 6.7 (Final) Top shows PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 32160 root 20 0 259m 104m 22m R 76.5 1.3 559:07.79 Xorg 23391 hardtolo 20 0 6293m 215m 26m S 16.9 2.7 21:49.86 java . . . And several instances of Xorg (one per user in addition to the shown root instance), java, FF, soffice.bin, a plugin-container for FF, ... Using stock Gnome Desktop with three active X sessions, 6 desktops for two users, multiple FF instances with multiple tabs. 6-core AMD 3200PR with ... $ free total used free shared buffers cached Mem: 8057856 5285484 2772372 34136 298992 1883828 -/+ buffers/cache: 3102664 4955192 Swap: 14352376 0 14352376 First caught my attention as *usually* FF is the hog, although I have seen Xorg bee the hog aoccasionally in the past. What next caught me is when using Ksnapshot to select a region of the screen the "window" no longer keeps up with my mouse movements, but lags and is "jerky". I have no custom xorg config, but have commented out the FF startup in /etc/X11/xinit/Xclients: # Argh! Nothing good is installed. Fall back to twm { # gosh, neither fvwm95 nor fvwm2 is available; # fall back to failsafe settings [ -x /usr/bin/xsetroot ] && /usr/bin/xsetroot -solid '#222E45' if [ -x /usr/bin/xclock ] ; then /usr/bin/xclock -geometry 100x100-5+5 & elif [ -x /usr/bin/xclock ] ; then /usr/bin/xclock -geometry 100x100-5+5 & fi if [ -x /usr/bin/xterm ] ; then /usr/bin/xterm -geometry 80x50-50+150 & fi # Commented out firefox stuff. # if [ -x /usr/bin/firefox -a -f /usr/share/doc/HTML/index.html ]; then # /usr/bin/firefox /usr/share/doc/HTML/index.html & # fi if [ -x /usr/bin/twm ] ; then exec /usr/bin/twm fi } As a starting point I did (wrapping - I tried to clean a bit) $ ps -ef|grep '32160\|32155\|11398' root 841 11398 0 Aug12 ? 00:00:00 /usr/libexec/gdm-simple-slave --display-id /org/gnome/DisplayManager/Display3 root 11398 1 0 Aug12 ? 00:00:00 /usr/sbin/gdm-binary -nodaemon root 11461 11398 0 Aug12 ? 00:00:00 /usr/libexec/gdm-simple-slave --display-id /org/gnome/DisplayManager/Display1 500 24891 1441 0 17:39 pts/42 00:00:00 grep 32160\|32155\|11398 root 32155 11398 0 Aug12 ? 00:00:00 /usr/libexec/gdm-simple-slave --display-id /org/gnome/DisplayManager/Display2 root 32160 32155 26 Aug12 tty7 09:33:09 /usr/bin/Xorg :1 -br -verbose -audit 4 auth /var/run/gdm/auth-for-gdm-4U2Ps1/database -nolisten tcp root 32221 32155 0 Aug12 ? 00:00:00 pam: gdm-password If no one else is seeing this sort of "slowdown" and has any clues where to start looking I'd appreciate hearing your suggestions. TIA for any thoughts, Bill