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I have a stupid little script for this:
#!/bin/sh
setres() {
output=$1
width=$2
height=$3
xrandr --output $output --brightness 0 --auto
xrandr --delmode $output better
xrandr --rmmode better
xrandr --newmode better $(cvt $width $height | tail -n1 | cut -d'"' -f3)
xrandr --addmode $output better
xrandr --output $output --brightness 1 --mode better
}
setres "$@"
Putting it in a function and the setres "$@" bit is superfluous here.
Eh, though you're right, it's a pattern I like a lot: define your "main" at the top, put all the supporting functions below, and call main at the end.
These days I've got a little bash task runner framework that I use for little scripts like this.
Nice script. What is the reason to toggle the brightness?
I didn't like the random blinking and glitchiness the screen did as it changed resolutions. Most OSes, if you notice, do a little fade out and in but I was too lazy to make it gradual.
That tool does not claim to support custom resolutions in any way.
Funny thing about this. I had always though that creating new resolutions didn't work because I would always encounter an error no matter what guide I followed. It wasn't until a month ago that I discovered that the new resolution thing with xrandr doesn't work on nvidia.