dolphin_oracle wrote:the good news is xrandr is already installed!

You will need the actual name of your output. On my system it was VGA1, but I might be different on yours. Run"xrandr" with no options from the commandline and you should see the list of outputs and which one is connected.

Or just run kmathern's command, which will look it up for you. You will need to adjust the gamma numbers depending on your system. kmathern's command bumps up to 2, which is actually doing something similar to my .7. You'll need to try either lowering or raising the number, and if that doesn't work, try the other way.

$ apt-cache show x11-xserver-utils
Package: x11-xserver-utils
Version: 7.7~3
Installed-Size: 443
Maintainer: Debian X Strike Force <debian-x@lists.debian.org>
Architecture: i386
Replaces: iceauth, sessreg, xbase-clients (<< 1:7.3), xgamma, xhost, xmodmap, xrandr, xrdb, xrefresh, xrgb, xset, xsetmode, xsetpointer, xsetroot, xstdcmap, xutils (<< 1:7.2), xvidtune
Depends: libc6 (>= 2.8), libice6 (>= 1:1.0.0), libx11-6, libxaw7, libxcursor1 (>> 1.1.2), libxext6, libxi6, libxmu6, libxmuu1, libxrandr2 (>= 2:1.2.99.3), libxrender1, libxt6, libxxf86vm1, cpp
Suggests: nickle, cairo-5c, xorg-docs-core
Conflicts: iceauth, sessreg, xgamma, xhost, xmodmap, xrandr, xrdb, xrefresh, xrgb, xset, xsetmode, xsetpointer, xsetroot, xstdcmap, xvidtune
Description-en: X server utilities
An X client is a program that interfaces with an X server (almost always via
the X libraries), and thus with some input and output hardware like a
graphics card, monitor, keyboard, and pointing device (such as a mouse).
.
This package provides a miscellaneous assortment of X Server utilities
that ship with the X Window System, including:
- iceauth, a tool for manipulating ICE protocol authorization records;
- rgb;
- sessreg, a simple program for managing utmp/wtmp entries;
- xcmsdb, a device color characteristic utility for the X Color Management System;
- xgamma, a tool for querying and setting a monitor's gamma correction;
- xhost, a very dangerous program that you should never use;
- xmodmap, a utility for modifying keymaps and pointer button mappings in X;
- xrandr, a command-line interface to the RandR extension;
- xrdb, a tool to manage the X server resource database;
- xrefresh, a tool that forces a redraw of the X screen;
- xset, a tool for setting miscellaneous X server parameters;
- xsetmode and xsetpointer, tools for handling X Input devices;
- xsetroot, a tool for tailoring the appearance of the root window;
- xstdcmap, a utility to selectively define standard colormap properties;
- xvidtune, a tool for customizing X server modelines for your monitor.
Description-md5: 7bc6b40d32fbe568c9539995f7b1053e
Tag: implemented-in::c, interface::commandline, role::program,
uitoolkit::TODO, x11::xserver
Section: x11
Priority: optional
Filename: pool/main/x/x11-xserver-utils/x11-xserver-utils_7.7~3_i386.deb
Size: 176808
MD5sum: 3fe925cbf498d136e09311ad01c4c5c4
SHA1: 684c315f28260511a191d90e10e15667db94d897
SHA256: b595a610e2dc5ab377d66cc11a1cca54b82e9fc2269de0c26c45529a53610dc4

xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 400, current 1600 x 900, maximum 1600 x 900
default connected 1600x900+0+0 0mm x 0mm
1600x900 60.0*
1440x900 60.0
1360x768 60.0
1152x864 75.0 70.0 60.0
1280x720 60.0
1024x768 75.0 70.0 60.0
832x624 75.0
800x600 75.0 72.0 60.0 56.0
640x480 75.0 73.0 67.0 60.0
720x400 70.0

man xrandr:

XRANDR(1) XRANDR(1)

NAME
xrandr - primitive command line interface to RandR extension

SYNOPSIS
xrandr [-help] [-display display] [-q] [-v] [--verbose] [--dryrun]
[--screen snum] [--q1] [--q12]
RandR version 1.3 options
[--current] [--noprimary]
Per-output options
[--panning widthxheight[+x+y[/track_widthx‐
track_height+track_x+track_y[/border_left/border_top/border_right/bor‐
der_bottom]]]] [--scale xxy] [--transform a,b,c,d,e,f,g,h,i] [--pri‐
mary]
RandR version 1.2 options
[--prop] [--fb widthxheight] [--fbmm widthxheight] [--dpi dpi] [--new‐
mode name mode] [--rmmode name] [--addmode output name] [--delmode out‐
put name]
Per-output options
[--output output] [--auto] [--mode mode] [--preferred] [--pos xxy]
[--rate rate] [--reflect reflection] [--rotate orientation] [--left-of
output] [--right-of output] [--above output] [--below output] [--same-
as output] [--set property value] [--off] [--crtc crtc] [--gamma
red:green:blue] [--brightness brightness]

help:

SUMMARY OF LESS COMMANDS

Commands marked with * may be preceded by a number, N.
Notes in parentheses indicate the behavior if N is given.

h H Display this help.
q :q Q :Q ZZ Exit.
---------------------------------------------------------------------------

MOVING

e ^E j ^N CR * Forward one line (or N lines).
y ^Y k ^K ^P * Backward one line (or N lines).
f ^F ^V SPACE * Forward one window (or N lines).
b ^B ESC-v * Backward one window (or N lines).
z * Forward one window (and set window to N).
w * Backward one window (and set window to N).
ESC-SPACE * Forward one window, but don't stop at end-of-file.
d ^D * Forward one half-window (and set half-window to N).
u ^U * Backward one half-window (and set half-window to N).
ESC-) RightArrow * Left one half screen width (or N positions).
ESC-( LeftArrow * Right one half screen width (or N positions).
F Forward forever; like"tail -f".
r ^R ^L Repaint screen.
R Repaint screen, discarding buffered input.