Provided by: nvidia-current_260.19.06-0ubuntu1_i386 bug


       nvidia-settings - configure the NVIDIA graphics driver


       nvidia-settings [options]
       nvidia-settings [options] --no-config
       nvidia-settings [options] --load-config-only
       nvidia-settings [options] {--query=attr | --assign=attr=value} ...
       nvidia-settings [options] --glxinfo

       Options: [-vh] [--config=configfile] [-c ctrl-display]
                [--verbose={errors | warnings | all}]
                [--describe={all | list | attribute_name}]

       attr has the form:


       The  nvidia-settings  utility  is  a  tool  for  configuring the NVIDIA
       graphics driver.  It  operates  by  communicating  with  the  NVIDIA  X
       driver, querying and updating state as appropriate.  This communication
       is done via the NV-CONTROL, GLX, XVideo, and RandR X extensions.

       Values such as brightness and gamma,  XVideo  attributes,  temperature,
       and OpenGL settings can be queried and configured via nvidia-settings.

       When  nvidia-settings  starts,  it  reads the current settings from its
       configuration file and sends those settings to the X server.  Then,  it
       displays  a  graphical user interface (GUI) for configuring the current
       settings.  When nvidia-settings exits, it queries the current  settings
       from the X server and saves them to the configuration file.


       -v, --version
              Print the nvidia-settings version and exit.

       -h, --help
              Print usage information and exit.

              Use  the  configuration  file  CONFIG  rather  than  the default

       -c, --ctrl-display=CTRL-DISPLAY
              Control the specified X display.  If this option is  not  given,
              then  nvidia-settings  will  control  the  display  specified by
              '--display'  ;  if  that  is  not  given,  then   the   $DISPLAY
              environment variable is used.

       -l, --load-config-only
              Load  the  configuration file, send the values specified therein
              to the X server, and exit.  This mode of operation is useful  to
              place in your xinitrc file, for example.

       -n, --no-config
              Do  not  load the configuration file.  This mode of operation is
              useful if  nvidia-settings  has  difficulties  starting  due  to
              problems with applying settings in the configuration file.

       -r, --rewrite-config-file
              Write  the X server configuration to the configuration file, and
              exit,  without  starting  the  graphical  user  interface.   See
              EXAMPLES section.

       -V, --verbose=VERBOSE
              Controls  how  much  information  is  printed.   By default, the
              verbosity is errors and only error messages are printed.   Valid
              values  are  'errors'  (print error messages), 'warnings' (print
              error and warning messages), and 'all' (print error, warning and
              other informational messages).

       -a, --assign=ASSIGN
              The  ASSIGN argument to the '--assign' command line option is of
              the form:

                {DISPLAY}/{attribute name}[{display devices}]={value}

              This assigns the attribute {attribute name} to the value {value}
              on  the  X  Display  {DISPLAY}.   {DISPLAY}  follows  the  usual
              {host}:{display}.{screen}  syntax  of  the  DISPLAY  environment
              variable  and  is optional; when it is not specified, then it is
              implied following the same rule as  the  --ctrl-display  option.
              If the X screen is not specified, then the assignment is made to
              all X  screens.   Note  that  the  '/'  is  only  required  when
              {DISPLAY} is present.

              {DISPLAY}  can  additionally  include  a target specification to
              direct an assignment to something other than  an  X  screen.   A
              target  specification  is contained within brackets and consists
              of a target type name, a colon, and the target id.   The  target
              type  name  can be one of screen , gpu , framelock , vcs , gvi ,
              or fan ; the target id is the index into  the  list  of  targets
              (for that target type).  The target specification can be used in
              {DISPLAY} wherever an X screen can be used, following the syntax
              {host}:{display}[{target_type}:{target_id}].  See the output of

                nvidia-settings -q all

              for  information  on  which  target types can be used with which
              attributes.  See the output of

                 nvidia-settings -q screens -q gpus -q framelocks  -q  vcs  -q
              gvis -q fans

              for lists of targets for each target type.

              The  [{display  devices}] portion is also optional; if it is not
              specified,  then  the  attribute  is  assigned  to  all  display

              Some examples:

                -a FSAA=5
                -a localhost:0.0/DigitalVibrance[CRT-0]=0
                -a [gpu:0]/DigitalVibrance[DFP-1]=63

       -q, --query=QUERY
              The  QUERY  argument  to the '--query' command line option is of
              the form:

                {DISPLAY}/{attribute name}[{display devices}]

              This queries the current value of the attribute {attribute name}
              on  the X Display {DISPLAY}.  The syntax is the same as that for
              the  '--assign'  option,  without  '=  {value}'  ;  specify  '-q
              screens',  '-q  gpus',  '-q framelocks', '-q vcs', '-q gvis', or
              '-q fans' to query  a  list  of  X  screens,  GPUs,  Frame  Lock
              devices,  Visual  Computing Systems, SDI Input Devices, or Fans,
              respectively, that are  present  on  the  X  Display  {DISPLAY}.
              Specify '-q all' to query all attributes.

       -t, --terse
              When  querying  attribute values with the '--query' command line
              option, only print the  current  value,  rather  than  the  more
              verbose  description of the attribute, its valid values, and its
              current value.

       -d, --display-device-string
              When printing attribute values  in  response  to  the  '--query'
              option,  if  the attribute value is a display device mask, print
              the value as a list of display devices (e.g.,  "CRT-0,  DFP-0"),
              rather than a hexadecimal bit mask (e.g., 0x00010001).

       -g, --glxinfo
              Print GLX Information for the X display and exit.

       -e, --describe=DESCRIBE
              Prints  information about a particular attribute.  Specify 'all'
              to list the descriptions of all attributes.  Specify  'list'  to
              list the attribute names without a descriptions.


       1.   Layout of the nvidia-settings GUI
       2.   How OpenGL Interacts with nvidia-settings
       3.   Loading Settings Automatically
       4.   Command Line Interface
       5.   X Display Names in the Config File
       6.   Connecting to Remote X Servers
       7.   Licensing
       8.   TODO

   1. Layout of the nvidia-settings GUI
       The   nvidia-settings  GUI  is  organized  with  a  list  of  different
       categories on the left side.   Only  one  entry  in  the  list  can  be
       selected  at  once,  and the selected category controls which "page" is
       displayed on the right side of the nvidia-settings GUI.

       The category list is organized in a tree: each X  screen  contains  the
       relevant  subcategories  beneath  it.   Similarly,  the Display Devices
       category for a screen contains all the enabled display devices  beneath
       it.    Besides   each  X  screen,  the  other  top  level  category  is
       "nvidia-settings  Configuration",  which  configures  behavior  of  the
       nvidia-settings application itself.

       Along the bottom of the nvidia-settings GUI, from left to right, is:

       1)     a status bar which indicates the most recently altered option;

       2)     a  Help  button  that toggles the display of a help window which
              provides a detailed explanation of the available options in  the
              current page; and

       3)     a Quit button to exit nvidia-settings.

       Most   options  throughout  nvidia-settings  are  applied  immediately.
       Notable exceptions are OpenGL options which are  only  read  by  OpenGL
       when an OpenGL application starts.

       Details about the options on each page of nvidia-settings are available
       in the help window.

   2. How OpenGL Interacts with nvidia-settings
       When an OpenGL application starts, it downloads the current values from
       the  X  driver,  and then reads the environment (see APPENDIX E: OPENGL
       ENVIRONMENT VARIABLE SETTINGS in the  README).   Settings  from  the  X
       server   override  OpenGL's  default  values,  and  settings  from  the
       environment override values from the X server.

       For example, by default OpenGL uses the FSAA setting requested  by  the
       application  (normally, applications do not request any FSAA).  An FSAA
       setting  specified  in  nvidia-settings  would  override   the   OpenGL
       application's   request.   Similarly,  the  __GL_FSAA_MODE  environment
       variable will override the application's FSAA setting, as well  as  any
       FSAA setting specified in nvidia-settings.

       Note  that  an  OpenGL  application  only retrieves settings from the X
       server when it starts, so if you make a change to an  OpenGL  value  in
       nvidia-settings,  it  will  only apply to OpenGL applications which are
       started after that point in time.

   3. Loading Settings Automatically
       The NVIDIA X driver does not preserve values set  with  nvidia-settings
       between  runs  of  the X server (or even between logging in and logging
       out of X, with xdm(1), gdm, or kdm ).   This  is  intentional,  because
       different users may have different preferences, thus these settings are
       stored on a per-user basis in a configuration file stored in the user's
       home directory.

       The configuration file is named ~/.nvidia-settings-rc.  You can specify
       a different configuration file name  with  the  --config  command  line

       After   you   have  run  nvidia-settings  once  and  have  generated  a
       configuration file, you can then run:

            nvidia-settings --load-config-only

       at any time in the future to upload these  settings  to  the  X  server
       again.   For  example,  you  might  place  the  above  command  in your
       ~/.xinitrc file so that your settings are  applied  automatically  when
       you log in to X.

       Your  .xinitrc  file,  which  controls  what  X  applications should be
       started when you log into X (or  startx),  might  look  something  like

            nvidia-settings --load-config-only &
            xterm &


            nvidia-settings --load-config-only &

       If  you  do  not already have an ~/.xinitrc file, then chances are that
       xinit(1) is using a system-wide xinitrc file.  This system wide file is
       typically here:


       To  use  it,  but  also  have nvidia-settings upload your settings, you
       could create an ~/.xinitrc with the contents:

            nvidia-settings --load-config-only &
            . /etc/X11/xinit/xinitrc

       System administrators may choose  to  place  the  nvidia-settings  load
       command directly in the system xinitrc script.

       Please  see  the  xinit(1)  man page for further details of configuring
       your ~/.xinitrc file.

   4. Command Line Interface
       nvidia-settings has a rich command line interface: all attributes  that
       can  be  manipulated  with the GUI can also be queried and set from the
       command line.  The command  line  syntax  for  querying  and  assigning
       attributes matches that of the .nvidia-settings-rc configuration file.

       The  --query  option  can  be  used  to  query  the  current  value  of
       attributes.  This will also report the valid values for the  attribute.
       You  can  run  nvidia-settings  --query  all  for  a  complete  list of
       available attributes, what the current value is, what values are  valid
       for  the  attribute,  and  through which target types (e.g., X screens,
       GPUs)  the  attributes  can  be  addressed.   Additionally,  individual
       attributes may be specified like this:

               nvidia-settings --query CursorShadow

       Attributes   that   may   differ   per  display  device  (for  example,
       DigitalVibrance can be set independently on each display device when in
       TwinView) can be appended with a "display device name" within brackets;

               nvidia-settings --query DigitalVibrance[CRT-0]

       If an attribute is display device specific,  but  the  query  does  not
       specify  a  display  device,  then  the attribute value for all display
       devices will be queried.

       An attribute name may be prepended with an X Display name and a forward
       slash to indicate a different X Display; e.g.:

               nvidia-settings --query localhost:0.0/DigitalVibrance[DFP-1]

       An attribute name may also just be prepended with the screen number and
       a forward slash:

               nvidia-settings --query 0/DigitalVibrance[DFP-1]

       in which case the default X Display will be used, but you can  indicate
       to  which X screen to direct the query (if your X server has multiple X
       screens).  If no X screen is specified, then the attribute  value  will
       be queried for all X screens.

       Attributes  can  be  addressed  through  "target types".  A target type
       indicates the object that is queried when you query an attribute.   The
       default target type is an X screen, but other possible target types are
       GPUs, Frame Lock devices, Visual Computing Systems, SDI Input  Devices,
       and fans.

       Target  types  give  you  different granularities with which to perform
       queries and assignments.  Since X screens can span  multiple  GPUs  (in
       the  case of Xinerama, or SLI), and multiple X screens can exist on the
       same GPU, it is sometimes useful to address attributes  by  GPU  rather
       than X screen.

       A  target  specification is contained within brackets and consists of a
       target type name, a colon, and the target id.  The target type name can
       be  one  of  screen, gpu, framelock, vcs, gvi, or fan; the target id is
       the index into the list of targets  (for  that  target  type).   Target
       specifications  can  be  used wherever an X screen is used in query and
       assignment commands; the target specification can  be  used  either  by
       itself  on  the  left  side  of  the  forward slash, or as part of an X
       Display name.

       For example, the following queries address X screen 0 on the localhost:

               nvidia-settings --query 0/VideoRam
               nvidia-settings --query localhost:0.0/VideoRam
               nvidia-settings --query [screen:0]/VideoRam
               nvidia-settings --query localhost:0[screen:0]/VideoRam

       To address GPU 0 instead, you can use either of:

               nvidia-settings --query [gpu:0]/VideoRam
               nvidia-settings --query localhost:0[gpu:0]/VideoRam

       See the output of

               nvidia-settings --query all

       for what targets types can be used with each attribute.  See the output

               nvidia-settings --query screens --query gpus --query framelocks --query vcs --query gvis --query fans

       for lists of targets for each target type.

       The  --assign option can be used to assign a new value to an attribute.
       The valid values for an attribute are reported when  the  attribute  is
       queried.   The  syntax  for  --assign  is the same as --query, with the
       additional requirement that assignments also have an equal sign and the
       new value.  For example:

               nvidia-settings --assign FSAA=2
               nvidia-settings --assign 0/DigitalVibrance[CRT-1]=9
               nvidia-settings --assign [gpu:0]/DigitalVibrance=0

       Multiple  queries  and assignments may be specified on the command line
       for a single invocation of nvidia-settings.

       If  either  the   --query   or   --assign   options   are   passed   to
       nvidia-settings,  the  GUI  will  not be presented, and nvidia-settings
       will exit after processing the assignments  and/or  queries.   In  this
       case, settings contained within the ~/.nvidia-settings-rc configuration
       file will not be automatically uploaded to the X server, nor  will  the
       ~/.nvidia-settings-rc  configuration  file  be automatically updated to
       reflect attribute assignments made via the --assign option.

   5. X Display Names in the Config File
       In the Command Line Interface section above, it was noted that you  can
       specify  an  attribute without any X Display qualifiers, with only an X
       screen qualifier, or with a full X Display name.  For example:

               nvidia-settings --query FSAA
               nvidia-settings --query 0/FSAA
               nvidia-settings --query

       In the first two cases, the default X Display  will  be  used,  in  the
       second  case,  the screen from the default X Display can be overridden,
       and in the third case, the entire default X Display can be overridden.

       The same  possibilities  are  available  in  the  ~/.nvidia-settings-rc
       configuration file.

       For  example,  in a computer lab environment, you might log into any of
       multiple workstations, and your home directory is NFS mounted  to  each
       workstation.     In   such   a   situation,   you   might   want   your
       ~/.nvidia-settings-rc file to be applicable to  all  the  workstations.
       Therefore,  you  would  not  want  your  config  file  to  qualify each
       attribute with an X Display Name.  Leave the "Include X  Display  Names
       in   the   Config   File"   option  unchecked  on  the  nvidia-settings
       Configuration page (this is the default).

       There may be cases when you do want attributes in the config file to be
       qualified  with the X Display name.  If you know what you are doing and
       want config file attributes to be qualified with an  X  Display,  check
       the  "Include  X  Display  Names  in  the  Config  File"  option on the
       nvidia-settings Configuration page.

       In the typical home user environment where your home directory is local
       to  one  computer  and  you are only configuring one X Display, then it
       does not matter whether each attribute setting is qualified with  an  X
       Display Name.

   6. Connecting to Remote X Servers
       nvidia-settings  is  an  X client, but uses two separate X connections:
       one to display the GUI,  and  another  to  communicate  the  NV-CONTROL
       requests.   These  two  X  connections  do not need to be to the same X
       server.  For example, you might run  nvidia-settings  on  the  computer,    export    the   display   to   the   computer, but be configuring the  X  server  on  the  computer

               nvidia-settings \

       If  --ctrl-display  is  not specified, then the X Display to control is
       what --display indicates.  If --display is also not specified, then the
       $DISPLAY environment variable is used.

       Note, however, that you will need to have X permissions configured such
       that you can establish an X connection from the computer on  which  you
       are  running  nvidia-settings  (  to the computer
       where you are displaying the GUI ( and  the  computer
       whose X Display you are configuring (

       The  simplest, most common, and least secure mechanism to do this is to
       use 'xhost' to allow access from the computer on which you are  running

               (issued from

               (issued from

       This  will  allow all X clients run on to connect
       and   display   on's   X   server   and   configure's X server.

       Please see the xauth(1) and xhost(1) man pages, or refer to your system
       documentation on remote X applications and security.   You  might  also
       Google for terms such as "remote X security" or "remote X Windows", and
       see documents such as the Remote X Apps mini-HOWTO:


       Please also note that the remote X server  to  be  controlled  must  be
       using the NVIDIA X driver.

   7. Licensing
       The source code to nvidia-settings is released as GPL.  The most recent
       official version of the source code is available here:


       Note that nvidia-settings is simply an NV-CONTROL client.  It uses  the
       NV-CONTROL X extension to communicate with the NVIDIA X server to query
       current settings and make changes to settings.

       You can make additions directly to nvidia-settings, or write  your  own
       NV-CONTROL client, using nvidia-settings as an example.

       Documentation on the NV-CONTROL extension and additional sample clients
       are available in the nvidia-settings source tarball.   Patches  can  be
       submitted to

   8. TODO
       There  are  many  things  still to be added to nvidia-settings, some of
       which include:

       -      different toolkits?  The  GUI  for  nvidia-settings  is  cleanly
              abstracted  from the back-end of nvidia-settings that parses the
              configuration file and command line,  communicates  with  the  X
              server, etc.  If someone were so inclined, a different front-end
              GUI could be implemented.

       -      write  a  design  document  explaining  how  nvidia-settings  is
              designed;  presumably  this  would  make it easier for people to
              become familiar with the code base.

       If there are other things you would like to see added (or  better  yet,
       would like to add yourself), please contact




              Starts the nvidia-settings graphical interface.

       nvidia-settings --load-config-only
              Loads the settings stored in ~/.nvidia-settings-rc and exits.

       nvidia-settings --rewrite-config-file
              Writes     the     current    X    server    configuration    to
              ~/.nvidia-settings-rc file and exits.

       nvidia-settings --query FSAA
              Query the value of the full-screen antialiasing setting.

       nvidia-settings --assign RedGamma=2.0 --assign  BlueGamma=2.0  --assign
              Set the gamma of the screen to 2.0.


       Aaron Plattner
       NVIDIA Corporation


       nvidia-xconfig(1), nvidia-installer(1)


       Copyright (C) 2010 NVIDIA Corporation.