Provided by: nvidia-173_173.14.30-0ubuntu11_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

       -r, --rewrite-config-file
              Write  the  current  X  server  configuration  to  the configuration file, and exit
              without starting a grpahical user interface.See Examples section.

       -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 --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 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.