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@chirag64
Forked from debloper/xrandr.sh
Last active Sep 22, 2021
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Added license on user request
#!/bin/bash
# Copyright © 2021 Chirag Bhatia
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#If no argument is specified, ask for it and exit
if [[ -z "$@" ]];
then
echo "An argument is needed to run this script";
exit
else
arg="$@"
#Basic check to make sure argument number is valid. If not, display error and exit
if [[ $(($(echo $arg | grep -o "\s" | wc --chars) / 2 )) -ne 2 ]];
then
echo "Invalid Parameters. You need to specify parameters in the format \"width height refreshRate\""
echo "For example setResolution \"1920 1080 60\""
exit
fi
#Save stuff in variables and then use xrandr with those variables
modename=$(echo $arg | sed 's/\s/_/g')
display=$(xrandr | grep -Po '.+(?=\sconnected)')
if [[ "$(xrandr|grep $modename)" = "" ]];
then
xrandr --newmode $modename $(gtf $(echo $arg) | grep -oP '(?<="\s\s).+') &&
xrandr --addmode $display $modename
fi
xrandr --output $display --mode $modename
#If no error occurred, display success message
if [[ $? -eq 0 ]];
then
echo "Display changed successfully to $arg"
fi
fi
<<COMMENT
#Manual steps with explanation ahead by @debloper
# First we need to get the modeline string for xrandr
# Luckily, the tool "gtf" will help you calculate it.
# All you have to do is to pass the resolution & the-
# refresh-rate as the command parameters:
gtf 1920 1080 60
# In this case, the horizontal resolution is 1920px the
# vertical resolution is 1080px & refresh-rate is 60Hz.
# IMPORTANT: BE SURE THE MONITOR SUPPORTS THE RESOLUTION
# Typically, it outputs a line starting with "Modeline"
# e.g. "1920x1080_60.00" 172.80 1920 2040 2248 2576 1080 1081 1084 1118 -HSync +Vsync
# Copy this entire string (except for the starting "Modeline")
# Now, use "xrandr" to make the system recognize a new
# display mode. Pass the copied string as the parameter
# to the --newmode option:
xrandr --newmode "1920x1080_60.00" 172.80 1920 2040 2248 2576 1080 1081 1084 1118 -HSync +Vsync
# Well, the string within the quotes is the nick/alias
# of the display mode - you can as well pass something
# as "MyAwesomeHDResolution". But, careful! :-|
# Then all you have to do is to add the new mode to the
# display you want to apply, like this:
xrandr --addmode VGA1 "1920x1080_60.00"
# VGA1 is the display name, it might differ for you.
# Run "xrandr" without any parameters to be sure.
# The last parameter is the mode-alias/name which
# you've set in the previous command (--newmode)
# It should add the new mode to the display & apply it.
# Usually unlikely, but if it doesn't apply automatically
# then force it with this command:
xrandr --output VGA1 --mode "1920x1080_60.00"
# That's it... Enjoy the new awesome high-res display!
COMMENT
@brandontict

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@brandontict brandontict commented Sep 8, 2018

Thanks for sharing

@Gordan35

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@Gordan35 Gordan35 commented Jun 12, 2019

How to run this script please?

@chirag64

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@chirag64 chirag64 commented Jun 12, 2019

How to run this script please?

@Gordan35 Save this in a text file in your home folder, then run chmod +x xrandr.sh to make it executable.

Then you can run it by doing ./xrandr.sh 1920 1080 60 to set a resolution of 1920 x 1080 or you can change the parameters as per your needs

@benye001

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@benye001 benye001 commented Jun 24, 2019

@chirag64 Hey, I followed the steps in your above comment and I get the following error:

xrandr: unrecognized option '1920_1080_60'

My xrandr.sh is in the home folder, I ran chmod +x xrandr.sh, and then I run the command ./xrandr.sh 1920 1080 60. Would you help me out please? I'm not sure what I'm doing wrong.

@chirag64

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@chirag64 chirag64 commented Jun 24, 2019

@bpav001: Check out the manual steps that start from line number 35. Patiently read through them and try those commands one by one

@machinejade

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@machinejade machinejade commented Sep 13, 2019

How do you make this permanent/persistent please?

@Dev-Sec0901

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@Dev-Sec0901 Dev-Sec0901 commented Jun 27, 2020

Thank you so much @chirag64, it saved hours...

@hrrieck

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@hrrieck hrrieck commented Sep 16, 2020

My screen resolution was maximized to 1024x768 (was 1920x1080) when I upgraded to Ubuntu 19 series and now I get the following message: xrandr: screen cannot be larger than 1024x768 (desired size 1920x1080), is there anything I can do about this?

@Liebig861

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@Liebig861 Liebig861 commented Jan 1, 2021

@chirag64 My screen resolution is 1024x768 but i need to add 1440x900 can you help me.........to get that, I'm new to Linux can you guide me step by step

@exesse

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@exesse exesse commented May 8, 2021

Hi Chirag,

very well made solution. Could you please add some(MIT, Apache 2.0) license to the file?

@chirag64

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@chirag64 chirag64 commented May 8, 2021

Hi Chirag,

very well made solution. Could you please add some(MIT, Apache 2.0) license to the file?

Hi @debloper, since this is a fork of your file, I'll need you to add a license to your original script first (and yes, I do realize the irony of forking first and asking for license later, my apologies 😅)

@exesse

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@exesse exesse commented May 8, 2021

@chirag64, thank you!

@debloper

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@debloper debloper commented May 10, 2021

Heh... I never thought this little script will have more than 1 user, but apparently it has 14 forks that are so much better than the original one! 😂

Here, I've added the license. Even though X11 may be on its way(land) out, hopefully this would still remain useful for legacy & DIY systems (where this was intended and useful in the first place). So, cheers!

@chirag64

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@chirag64 chirag64 commented May 10, 2021

@debloper

Heh... I never thought this little script will have more than 1 user, but apparently it has 14 forks that are so much better than the original one! 😂

People are likely discovering it because it was used in a highly voted StackExchange answer to a question about this problem (I think we may have discussed this before) - https://unix.stackexchange.com/a/227894/11912

Here, I've added the license

Thanks 👍🏼

@chirag64

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@chirag64 chirag64 commented May 10, 2021

@exesse

Could you please add some(MIT, Apache 2.0) license to the file?

Done 👍🏼

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@exesse exesse commented May 10, 2021

Cool, thank you guys! I use it to solve the issue between macbook retina screen resolution and my headless linux host during chrome remote sessions. Otherwise I would have to do all those steps manually in every reboot. 🎉🎉🎉

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@antiphase antiphase commented Jul 13, 2021

Lines 12-19; if the context were slightly different (i.e. you hadn't slurped all the positional parameters into a single string at that point), it's just a really elaborate way of writing
if [[ $# -ne 3 ]];
to test that there are 3 arguments provided

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