After upgrading to Ubuntu 15.04 system freezes than I run something in fullscreen (Kodi.tv, Steam in Big Picture mode). In htop I'm seeing 99%-102% cpu usage from compiz.
sudo lshw -C video
*-display
description: VGA compatible controller
product: GK104 [GeForce GTX 660 Ti]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:35 memory:f6000000-f6ffffff memory:e8000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:f7000000-f707ffff
glxinfo | grep -i string
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4
client glx vendor string: NVIDIA Corporation
client glx version string: 1.4
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GTX 660 Ti/PCIe/SSE2
OpenGL core profile version string: 4.4.0 NVIDIA 340.76
OpenGL core profile shading language version string: 4.40 NVIDIA via Cg compiler
OpenGL version string: 4.4.0 NVIDIA 340.76
OpenGL shading language version string: 4.40 NVIDIA via Cg compiler
OpenGL ES profile version string: OpenGL ES 3.1 NVIDIA 340.76 340.76
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
dpkg-query --show xserver-xorg-video-intel
xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1
uname -a
Linux ubuH 3.19.1-031901-generic #201504091335 SMP Thu Apr 9 17:36:25 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Other: Login screen doesn't show wallpaper and logo, and when I log in on the screen appear artifacts - pieces of windows from previous session (like here). But when I lock system I can see the wallpaper and logo
