I have the same problem since I upgraded from 13.10 to 14.04 on my TOSHIBA S50D. AMD A10 4 core processor and a RADEON HD 8500 dual graphis card. With only the system monitor running in a 24 hour period Xorg consumes 7GB of pgysical memory and 4 GB of swap space.
Another symptom, is that on the systm monitor it shows the 4 cores, but they appear to working on the the same task, amost like they were acting as a single core processor. I initially saw this same behaviour when I install 13.04. The resilution was to install the AMD driver, however, when I attempt to install the AMD driver the installation process complains that there is an existing fglrx and to remove it. Once I remove the fglrx package I boot into "LOW GRAPHICS MODE". Again, if I user the terminal in low graphics mode and try to complie the AMD driver, the process trys to create a fglrx package and the installation process complains that the is an existing fglrx installed package. Under Additional Drivers, I get the memory leak whether I use the Xorg driver, or the fglrx-updates or the fglrx option. I also do not see any of the four cores operating independently. I would appreciate suggestion, because I am running dry. Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1314787 Title: Memory leak To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1314787/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs