Since August 2012, it is not possible to suspend my laptop because the wake is
not correctly effected. In fact, my screen become white and I can't change that
without restart my laptop or X.

I have these messages during the wake :
Jan 25 15:23:36 DiNozzo kernel: [  168.373621] nouveau E[ 
PGRAPH][0000:01:00.0] TRAP ch 1 [0x003fcf8000]
Jan 25 15:23:36 DiNozzo kernel: [  168.373632] nouveau E[ 
PGRAPH][0000:01:00.0] SHADER 0xa004021e
Jan 25 15:23:36 DiNozzo kernel: [  168.373693] nouveau E[ 
PGRAPH][0000:01:00.0] TRAP ch 1 [0x003fcf8000]
Jan 25 15:23:36 DiNozzo kernel: [  168.373704] nouveau E[ 
PGRAPH][0000:01:00.0] SHADER 0xa004021e
Jan 25 15:23:36 DiNozzo kernel: [  168.384201] nouveau E[ 
PGRAPH][0000:01:00.0] TRAP ch 3 [0x003fd3a000]
Jan 25 15:23:36 DiNozzo kernel: [  168.384213] nouveau E[ 
PGRAPH][0000:01:00.0] SHADER 0xa204021e
Jan 25 15:23:36 DiNozzo kernel: [  168.385017] nouveau E[ 
PGRAPH][0000:01:00.0] TRAP ch 3 [0x003fd3a000]
Jan 25 15:23:36 DiNozzo kernel: [  168.385035] nouveau E[ 
PGRAPH][0000:01:00.0] SHADER 0xa204021e

It's a big loop (more 100 lines with theses informations…).

Packages :
xserver 1.13.1
mesa-dri-drivers 9.0.1
kernel  3.7.4
xorg-x11-drv-nouveau 1.0.6

Hardware :
HP Elitebook 8560w
nVidia Quadro 1000m