possible memory leak in Xorg?

[Hans Mackowiak]

Am Samstag, den 24.05.2014, 08:49 -0300 schrieb Solerman Kaplon:
> Em 24-05-2014 06:55, Hans Mackowiak escreveu:
> > 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.
> >
> 
> I dont know what causes it, I upgraded all packages a week later, rebooted and 
> the problem is gone. But I use kubuntu, i965 gpu and very few effects enabled in 
> KWin.
> 
> Solerman

I am using cinnamon, but it happens for gnome-classic too. So i don't
think they are the culprits, specially that its the Xorg proccess that
gets that much ram and not one of the session managers. same goes for
lightdm, my display manager.

my Xorg.0.log has:

[    21.412] (EE) open /dev/dri/card0: No such file or directory
[    22.321] (EE) AIGLX error: failed to open /usr/X11R6/lib64/modules/dri/fglrx_dri.so, error[/usr/X11R6/lib64/modules/dri/fglrx_dri.so: cannot open shared object file: No such file or directory]
[    22.321] (EE) AIGLX error: failed to open /usr/lib64/dri/fglrx_dri.so, error[/usr/lib64/dri/fglrx_dri.so: cannot open shared object file: No such file or directory]
[    22.321] (EE) AIGLX error: failed to open /usr/X11R6/lib/modules/dri/fglrx_dri.so, error[/usr/X11R6/lib/modules/dri/fglrx_dri.so: cannot open shared object file: No such file or directory]

fglrx-updates only installed 
fglrx-updates: /usr/lib32/fglrx/dri/fglrx_dri.so
fglrx-updates: /usr/lib/fglrx/dri/fglrx_dri.so

is that maybe the problem?

maybe grub is the problem, because record_failsafe is currently
deactivated my be because otherwise grub cant mount my system.
(also the Login Scene is in the wrong resolution and when i login into
gnome-classic it says that way)