Public bug reported:

Provide Nvidia 334.21 drivers for ubuntu 14.04.
This driver provides alot of performance improvements.

Changlog:
http://www.nvidia.com/download/driverResults.aspx/73666/en-us

    Added support for the following GPUs:
        GeForce GTX 750 Ti
        GeForce GTX 750
        GeForce GTX 745
        GeForce GTX TITAN Black
    Fixed a regression in the NVIDIA kernel module which caused it to 
improperly dereference a userspace pointer. This potential security issue was 
initially reported to the public at:

    http://forums.grsecurity.net/viewtopic.php?f=3&t=3922

    The regression did not affect NVIDIA GPU drivers before release 334.

    Fixed a bug that could cause OpenGL programs to hang after calling fork(2).
    Fixed a bug that could cause a multi-threaded OpenGL application to crash 
when one of its threads exits after the application has unloaded libGL.
    Added support for GPUs with VDPAU Feature Set E. See the README for details.
    On GPUs with VDPAU Feature Set E, VDPAU now supports more robust decode 
error handling at the cost of a minor performance impact.
    This can be disabled by setting the
    VDPAU_NVIDIA_DISABLE_ERROR_CONCEALMENT environment variable to 1.
    Added support for application profile rule patterns which are logical 
operations of subpatterns. See the README for details.
    Added support for a "findfile" application profile feature which allows the 
driver to apply profiles based on matching files in the same directory as the 
process executable. See the README for details.
    Fixed a bug that caused nvidia-installer to log the automatically selected 
answers to some user prompts without logging the prompt text itself, when 
running in silent mode.
    Improved performance of OpenGL applications when used in conjunction with 
the X driver's composition pipeline. The composition pipeline may be explicitly 
enabled by using the ForceCompositionPipeline or ForceFullCompositionPipeline 
MetaMode options, or implicitly enabled when certain features such as some 
XRandR transformations, rotation,Warp & Blend, PRIME, and NvFBC are used.
    Fixed a bug that could cause nvidia-settings to compute incorrect gamma 
ramps when adjusting the color correction sliders.
    Updated the nvidia-settings control panel to allow the selection of display 
devices using RandR and target ID names when making queries targeted towards 
specific display devices.
    Fixed a bug that prevented some dropdown menus in the nvidia-settings 
control panel from working correctly on older versions of GTK+ (e.g. 2.10.x).
    Updated the nvidia-settings control panel to provide help text for 
application profile keys and suggestions for valid key names when configuring 
application profiles.
    Updated the nvidia-settings control panel to populate the dropdown menu of 
stereo modes with only those modes which are available.
    Fixed a bug that could cause applications using the OpenGL extension 
ARB_query_buffer_object to crash under Xinerama.
    Fixed a bug that caused high pixelclock HDMI modes (e.g. as used with 4K 
resolutions) to be erroneously reported as dual-link in the nvidia-settings 
control panel.
    Fixed a bug that could cause poor stereo synchronization in large 
multi-monitor setups using 3D Vision, due to failed hardwarehandshaking on some 
of the monitors.
    Fixed a bug that prevented some DisplayPort 1.2 displays from being 
properly restored after a VT switch.
    Renamed per GPU proc directories in /proc/driver/nvidia/gpus/ with GPU's 
bus location represented in "domain:bus:device.function" format.
    Added 64-bit EGL and OpenGL ES libraries to 64-bit driver packages.
    Changed format of "Bus Location" field reported in the 
/proc/driver/nvidia/gpus/0..N/information files from 
"domain:bus.device.function" to "domain:bus:device.function" to match
    the lspci format.
    Fixed a bug in the GLX_EXT_buffer_age extension where incorrect ages would 
be returned unless triple buffering was enabled.
    Updated the NVIDIA X driver to load the NVIDIA kernel module using 
`nvidia-modprobe`, rather than the XFree86 DDX helper function 
xf86LoadKernelModule().
    Changed the driver's default behavior to stop deleting RandR 1.2 output 
corresponding to unused DisplayPort 1.2 devices. Deleting these outputs can 
confuse some applications. Added a new option, DeleteUnusedDP12Displays, which 
can be used to turn this behavior back on.

    This option can be enabled by running sudo nvidia-xconfig --delete-
unused-dp12-displays

    Improved support for the __GL_SYNC_DISPLAY_DEVICE and 
VDPAU_NVIDIA_SYNC_DISPLAY_DEVICE environment variables in certain 
configurations. Both environment variables will now recognize all supported 
display device names. See "Appendix C. Display Device Names" and "Appendix G. 
VDPAU Support" in the README for more details.
    Improved performance of the X driver when handling large numbers of surface 
allocations.

** Affects: nvidia-graphics-drivers-304 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1287753

Title:
  Nvidia 334.21

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