Yep, bug still occurs in 13.04 (fully updated, 310.44 drivers).

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https://bugs.launchpad.net/bugs/92599

Title:
  Incorrect (low/stuttering) refresh rate with NVIDIA driver

Status in Compiz:
  Fix Released
Status in Compiz Core:
  Fix Released
Status in Ubutter: Making Ubuntu buttery smooth:
  Fix Released
Status in “compiz” package in Ubuntu:
  Fix Released
Status in “nvidia-graphics-drivers” package in Ubuntu:
  Invalid

Bug description:
  The problem here is that incorrect information from the NVIDIA driver
  is tricking some software like Compiz into using an incorrect refresh
  rate, which makes the whole desktop look choppy.

  The cause of this framerate problem is the DynamicTwinView feature of
  the NVIDIA graphics driver. It appears to be a documented "feature" of
  the driver, and has been for several years:

  --- Quote from the NVIDIA documentation ---
  Option "DynamicTwinView" "boolean"
  Enable or disable support for dynamically configuring TwinView on this X 
screen. When DynamicTwinView is enabled (the default), the refresh rate of a 
mode (reported through XF86VidMode or XRandR) does not correctly report the 
refresh rate, but instead is a unique number such that each MetaMode has a 
different value. This is to guarantee that MetaModes can be uniquely identified 
by XRandR.
  When DynamicTwinView is disabled, the refresh rate reported through XRandR 
will be accurate, but NV-CONTROL clients such as nvidia-settings will not be 
able to dynamically manipulate the X screen's MetaModes. TwinView can still be 
configured from the X config file when DynamicTwinView is disabled.
  Default: DynamicTwinView is enabled.
  --- End quote ---
  
[http://us.download.nvidia.com/XFree86/Linux-x86/280.13/README/xconfigoptions.html]

  WORKAROUND (1)

  (in /etc/X11/xorg.conf)
  Section "Device"
    Option "DynamicTwinView" "False"
  EndSection

  If the workaround doesn't work for you and you still see
  stuttering/jerkiness then you probably have bug 888039, which is
  caused by other performance regressions in the Ubuntu 11.10 release.

  WORKAROUND (2)

  CCSM > Composite >
    Detect Refresh Rate = OFF
    Refresh Rate = 60 (or whatever is correct for you monitor)

  ORIGINAL DESCRIPTION:

  Binary package hint: xorg

  My Samsung SyncMaster 931BF does actually support 75 hz screen refresh
  rate, but xorg lets me choose only between 50 Hz and 54 Hz.
  Modification of /etc/X11/xorg.conf does not help. xorg worked ok on
  edgy.

  Here's some info:

  $ uname -a
  Linux Xel-Naga 2.6.20-10-generic #2 SMP Mon Mar 12 00:02:49 UTC 2007 i686 
GNU/Linux

  $ apt-cache show xorg | grep Version
  Version: 1:7.2-0ubuntu7

  The video card is Nvidia GeForce 7300GS.

  ProblemType: Bug
  Architecture: i386
  Date: Thu Mar 15 21:08:22 2007
  DistroRelease: Ubuntu 7.04
  Uname: Linux Xel-Naga 2.6.20-10-generic #2 SMP Mon Mar 12 00:02:49 UTC 2007 
i686 GNU/Linux

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