Given that this seems to be related to Intel, I should add that I am using the video drivers via the intel graphics installer:
apt-cache policy intel-linux-graphics-installer intel-linux-graphics-installer: Installed: 1.0.7-0intel1 Candidate: 1.0.7-0intel1 Version table: *** 1.0.7-0intel1 0 500 https://download.01.org/gfx/ubuntu/14.04/main/ trusty/main amd64 Packages 100 /var/lib/dpkg/status : Intel Graphics Installer for Linux report <b>9 added, 20 upgraded, 13 downgraded, 0 removed.</b> Added: i965-va-driver:amd64 (1.4.1~veboxmaster1-3-vebox~trusty) libedit2:i386 (3.1-20130712-2) libllvm3.5:amd64 (1:3.5-4ubuntu2~trusty1) libllvm3.5:i386 (1:3.5-4ubuntu2~trusty1) libva-egl1:amd64 (1.4.0-0intel1) libva-tpi1:amd64 (1.4.0-0intel1) libva-wayland1:amd64 (1.4.0-0intel1) va-driver-all:amd64 (1.4.0-0intel1) vainfo:amd64 (1.4.0-0intel1) Upgraded: intel-gpu-tools:amd64 (from 1.3-0ubuntu2.1 to 1.8-1) libegl1-mesa-drivers:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libegl1-mesa:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libgbm1:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libgl1-mesa-dev:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libgl1-mesa-dri:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libgl1-mesa-dri:i386 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libgl1-mesa-glx:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libgl1-mesa-glx:i386 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libglapi-mesa:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libglapi-mesa:i386 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libgles1-mesa:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libgles2-mesa:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libopenvg1-mesa:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libosmesa6:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libosmesa6:i386 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libwayland-egl1-mesa:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) libxatracker2:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) mesa-common-dev:amd64 (from 10.1.3-0ubuntu0.3 to 10.3.0-0ubuntu2intel1) xserver-xorg-video-intel:amd64 (from 2:2.99.910-0ubuntu1.4 to 2:2.99.911-0intel1) Downgraded: libdrm-dev:amd64 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libdrm-intel1:amd64 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libdrm-intel1:i386 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libdrm-nouveau2:amd64 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libdrm-nouveau2:i386 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libdrm-radeon1:amd64 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libdrm-radeon1:i386 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libdrm2:amd64 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libdrm2:i386 (from 2.4.56-1~ubuntu1 to 2.4.56-1) libva-drm1:amd64 (from 1.4.0~trusty to 1.4.0-0intel1) libva-glx1:amd64 (from 1.4.0~trusty to 1.4.0-0intel1) libva-x11-1:amd64 (from 1.4.0~trusty to 1.4.0-0intel1) libva1:amd64 (from 1.4.0~trusty to 1.4.0-0intel1) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1384342 Title: kernel messages intel_crtc_wait_for_pending_flips correlate to compiz hang To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1384342/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs