Having the same issue myself. Xorg process gradually consumes more and more RAM over time until the desktop becomes unusable and either crashes, or needs to be rebooted to get going again.
== In my case below, PID 2012 is currently up to 2.1GB of RAM again. root@host:~# free -m total used free shared buffers cached Mem: 16039 15843 195 40 397 9416 -/+ buffers/cache: 6029 10010 Swap: 11585 3 11582 root@host:~# top -p 2012 top - 12:28:54 up 20:49, 5 users, load average: 2.61, 2.53, 2.57 Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie %Cpu(s): 2.8 us, 1.8 sy, 0.0 ni, 82.5 id, 12.6 wa, 0.3 hi, 0.0 si, 0.0 st KiB Mem: 16424276 total, 16235752 used, 188524 free, 408120 buffers KiB Swap: 11863964 total, 3544 used, 11860420 free. 9652088 cached Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2012 root 20 0 2572068 2.062g 205736 S 3.7 13.2 167:01.86 Xorg root@host:~# ps -lf 2012 F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD 4 S root 2012 1930 13 80 0 - 641118 poll_s Aug12 tty7 166:31 /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch root@host:~# ps -o pid=,args=,rss=,size=,vsize= 2012 2012 /usr/bin/X -core :0 -seat s 2169192 1961620 2579280 == root@host:~# uname -a Linux host 3.13.0-30-generic #55-Ubuntu SMP Fri Jul 4 21:40:53 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux root@host:~# dpkg-query -l "*xorg*" Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-==================================-======================-======================-========================================================================= ii xorg 1:7.7+1ubuntu8 amd64 X.Org X Window System .. ii xserver-xorg 1:7.7+1ubuntu8 amd64 X.Org X server ii xserver-xorg-core 2:1.15.1-0ubuntu2 amd64 Xorg X server - core server .. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1272338 Title: Xorg memory leak on trusty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1272338/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp