High DPI screen on Linux.

I recently received a high-DPI screen at work (24” ultra HD). While the quality is excellent, a few problems arise as everything is very small by default.

As I use it on my laptop, I had to find an easy way to switch between different settings :

• high DPI for my UHD screen
• medium DPI when using the laptop screen (12” Full HD)
• normal DPI when using a normal external screen

First, to handle the display configuration I’m using autorandr which is awesome.

Then, I use a little bash script that will change the needed settings :

• cursor size
• font size in awesome
• layout.css.devPixelsPerPx setting in Thunderbird and Firefox

But some things still won’t work :

• Chrome
• Flash
• Java
• Windows XP (in my virtual machine)

You can find my ugly shell script here.