Provided by: nvidia-96_96.43.20-0ubuntu6_amd64 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}]

       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 with the NV-CONTROL X extension.

       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 ~/.nvidia-settings-rc

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

       -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.

       -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

       -V, --verbose=verbosity
              Controls  how much information is printed.  By default, the verbosity is errors and
              only error messages are printed.

              verbosity can be one of the following values:
                   errors - Print errors.
                   warnings - Print errors and warnings.
                   all - Print errors, warnings, and other information.

       -a, --assign=assign
              The assign argument to the --assign commandline 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, or framelock;  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 --query 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

              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 devices.

              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 commandline 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,  or -q framelocks to query a list of X
              screens, GPUs, or Frame Lock devices, respectively,  that  are  present  on  the  X
              Display {DISPLAY}.  Specify -q all to query all attributes.

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


       1.   Layout of the nvidia-settings GUI
       2.   How OpenGL Interacts with nvidia-settings
       3.   Loading Settings Automatically
       4.   Commandline 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

   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

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

       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 this:

            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. Commandline Interface
       nvidia-settings  has  a rich commandline interface: all attributes that can be manipulated
       with the GUI can also be queried and set from the command line.   The  commandline  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; e.g.:

               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 and Frame Lock devices.

       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,  or  framelock;
       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 of

               nvidia-settings --query screens --query gpus --query framelocks

       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  commandline 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

   5. X Display Names in the Config File
       In the Commandline 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

       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 nvidia-settings.

               (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

   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:

       -      configurability of TwinView (NVIDIA is planning to implement this)

       -      configurability of multiple X screens (NVIDIA is planning to implement this)

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

       -      write  a  design document explaining how nvidia-settings is architected; 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 --query FSAA
              Query the value of the full-screen antialiasing setting.

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


       Aaron Plattner
       NVIDIA Corporation


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


       Copyright © 2006 NVIDIA Corporation.