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Automatic setting of your multi display setting

So you have an X server running with multiple displays (or monitors).
You are using the great arandr tool to quickly setup your setting. But, you don't want to do this each time you are starting your X.
What can you do?
First of all, hit the "Save As" button in you arandr gui and store the shell script.
Afterwards, adapt the file that is read once you login into your system or start your X. This can be .xinit, .login or .profile.
Inside this file, simple add the adapted content from below and thats it.

maybe you have to change the path ".screenlayout" or the file name "default.sh"

if [ -f $HOME'/.screenlayout/default.sh' ]; then
. $HOME'/.screenlayout/default.sh'
fi

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blockify-ui stops working with error: Xlib: extension "GLX" missing on display ":0".

So you updated your blockify and you wanted start it.
Instead of the blockify ui, you are getting the following error on the command line:


Xlib: extension "GLX" missing on display ":0".
What to do?
Try to install mesa-libgl and everything should be fine again.

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