Provided by: nvidia-settings_361.42-0ubuntu1_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={none | errors | deprecations | 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

       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=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=VERBOSE
              Controls how much information is printed.  Valid values are 'none'  (do  not  print
              status  messages), 'errors' (print error messages), 'deprecations' (print error and
              deprecation messages), 'warnings' (print error, deprecation, and warning messages),
              and 'all' (print error, deprecation, warning and other informational messages).  By
              default, 'deprecations' is set.

       -a ASSIGN, --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  ,  fan  ,
              thermalsensor  , svp , or dpy ; 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 -q
              thermalsensors -q svps -q dpys

              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=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',
              '-q fans' , '-q thermalsensors', '-q svps', or '-q dpys'  to  query  a  list  of  X
              screens,  GPUs,  Frame  Lock  devices, Visual Computing Systems, SDI Input Devices,
              Fans,  Thermal  Sensors,  3D  Vision  Pro   Transceivers,   or   Display   Devices,
              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.,

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

       -e DESCRIBE, --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.

       -p PAGE, --page=PAGE
              The  PAGE  argument to the '--page' commandline option selects a particular page in
              the nvidia-settings user interface to display upon starting nvidia-settings.  Valid
              values  are the page names in the tree view on the left side of the nvidia-settings
              user interface; e.g.,

                --page="X Screen 0"

              Because some page names are not unique (e.g., a "PowerMizer" page is present  under
              each  GPU), the page name can optionally be prepended with the name of the parent X
              Screen or GPU page, followed by a comma.  E.g.,

                --page="GPU 0 - (Quadro 6000), PowerMizer"

              The first page with a name matching the PAGE argument will be  used.   By  default,
              the "X Server Information" page is displayed.

       -L, --list-targets-only
              When  performing  an attribute query (from the '--query' command line option) or an
              attribute assignment (from the '--assign' command line option or  when  loading  an
              ~/.nvidia-settings-rc  file),  nvidia-settings  identifies  one  or more targets on
              which to query/assign the attribute.

              The '--list-targets-only' option will cause nvidia-settings to list the targets  on
              which  the  query/assign  operation  would  have  been  performed, without actually
              performing the operation(s), and exit.

       -w, --write-config, --no-write-config
              Save the configuration file on exit (enabled by default).

       -i, --use-gtk2
              Force nvidia-settings to use the GTK+ 2 library for the graphical user interface if
              a  user  interface  is  required.  This  option  is only available on systems where
              nvidia-settings supports both the GTK+ 2 and GTK+ 3 user interfaces.

       -I GTK-LIBRARY, --gtk-library=GTK-LIBRARY
              Specify the graphical user interface library  to  use  if  a  nvidia-settings  user
              interface  is  required.  This value may be the exact location of the library or it
              may be the directory containing the appropriately named library.  If  this  is  the
              exact location, the 'use-gtk2' option is ignored.


       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

   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 command line 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. 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 Overlay

       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/Overlay

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

               nvidia-settings --query 0/Overlay

       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 valid targets of the attribute
       (eg GPUs, Displays X screens, etc).

       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, fans, thermal sensors, 3D Vision Pro Transceivers and display 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 may consist of a target type name,
       a  colon,  and  the target id.  The target type name can be one of screen, gpu, framelock,
       vcs, gvi, fan, thermalsensor, svp, or dpy; 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

       Note that if a target specification is present, it will override any X screen specified in
       the display name as the target to process.  For example, the following query would address
       GPU 0, and not X screen 1:

            nvidia-settings --query localhost:0.1[gpu:0]/VideoRam

       A  target name may be used instead of a target id, in which case all targets with matching
       names are processed.

       For example, querying the DigitalVibrance of display device DVI-I-1 may be done like so:

            nvidia-settings --query [dpy:DVI-I-1]/DigitalVibrance

       When a target name is specified, the target type name may be omitted, though  this  should
       be  used  with  caution since the name will be matched across all target types.  The above
       example could be written as:

            nvidia-settings --query [DVI-I-1]/DigitalVibrance

       The target name may also simply be a target type name, in which case all targets  of  that
       type will be queried.

       For exmple, querying the BusRate of all GPUs may be done like so:

            nvidia-settings --query [gpu]/BusRate

       The  target  specification  may  also include a target qualifier.  This is useful to limit
       processing to a subset of targets, based on an existing relationship(s) to other  targets.
       The  target  qualifier  is specified by prepending a target type name, a colon, the target
       id, and a period to the existing specification.  Only one qualitfer may be specified.

       For example, querying the RefreshRate of all DFP devices on GPU 1 may be done like so:

            nvidia-settings --query [GPU:1.DPY:DFP]/RefreshRate

       Likewise, a simple target name (or target type name) may be used as  the  qualifier.   For
       example, to query the BusType of all GPUs that have DFPs can be done like so:

            nvidia-settings --query [DFP.GPU]/BusType

       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 --query vcs --query gvis --query fans --query thermalsensors --query svps --query dpys

       for lists of targets for each target type.

       To  enable  support  for  the  "GPUGraphicsClockOffset"  and "GPUMemoryTransferRateOffset"
       attributes, ensure that the "Coolbits" X configuration option includes the  value  "8"  in
       the bitmask.  For more details, refer to the documentation of the "Coolbits" option in the
       NVIDIA driver README.  Query the "GPUPerfModes" string attribute to  see  a  list  of  the
       available performance modes:

            nvidia-settings --query GPUPerfModes

       Each performance mode is presented as a comma-separated list of "token=value" pairs.  Each
       set of performance mode tokens is separated by a ";".   The  "perf"  token  indicates  the
       performance  level.   The "*editable" tokens indicate which domains within the performance
       level   can    have    an    offset    applied.     The    "GPUGraphicsClockOffset"    and
       "GPUMemoryTransferRateOffset"   attributes   map   respectively   to   the  "nvclock"  and
       "memtransferrate" tokens of performance levels in the "GPUPerfModes" string.

       Note   that   the   clock    manipulation    attributes    "GPUGraphicsClockOffset"    and
       "GPUMemoryTransferRateOffset"  apply  to  the offsets of specific performance levels.  The
       performance level is specified in square brackets after the attribute name.  For  example,
       to query the "GPUGraphicsClockOffset" for performance level 2:

            nvidia-settings --query GPUGraphicsClockOffset[2]

       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 [CRT-1]/DigitalVibrance=9
               nvidia-settings --assign [gpu:0]/DigitalVibrance=0
               nvidia-settings --assign [gpu:0]/GPUGraphicsClockOffset[2]=10

       Multiple queries and assignments may be  specified  on  the  command  line  for  a  single
       invocation of nvidia-settings.  Assignments are processed in the order they are entered on
       the command line.  If multiple assignments are made to the same attribute or  to  multiple
       attributes with dependencies, then the later assignments will have priority.

       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

       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:

       -      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 GreenGamma=2.0
              Set the gamma of the screen to 2.0.


       Aaron Plattner
       NVIDIA Corporation


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


       Copyright © 2010 NVIDIA Corporation.