possible memory leak in Xorg?

[Hans Mackowiak]

hey since i upgraded to Ubuntu14.04 i noticed some kind of memory leak
in the Xorg server ... currently it uses 9,6GB of my memory which seems
very to much.

what could possible the cause, this packages are installed:

ubuntu-desktop-mir > xserver-xorg-xmir (i dont know if its used)
libwayland-dev & libwayland-egl1-mesa
fglrx-updates (but i think it happens with the radeon driver too)


can someone help me to find the cause of the memory problem?