What are the steps you need to adapt Ubuntu on a fresh installed Laptop with a high resolution display?
I have a display with 3200x1600px on only 11'' which is all realy tiny.
There are some steps to take:
1. System wide Menu and titlebar scaling
Starting with 14.04 we have an option that helps a bit:
open the System Settings (here in english:)
Go to "Displays" and set the "Scale for menu and title bars":
see also: How to find and change the screen DPI?
2. Universal Access
Go to "Universal Access" (
3.increase unity dock size
4. adapt Firefox
(or use Chrome, which works fine since Version 41.0.2272.76 Ubuntu 14.10, though Chrome will need to be restarted to take effect)
5. increase font in Pidgin
There is a plugin you can install
Then you can increase the font in Plugins->Extended Prefs
6. create starter for applications that still don't scale
Some applications still don't obey the global scaling (mainly java) for those few applications you can create a starter to only Fix scaling of java-based applications for a high DPI screen
in older Ubuntu versions, with unity-tweak-util in the section "Fonts" you can set the "Text Scaling Factor" to 2.0. This will scale the fonts in most applications to double size.
Go to System Settings and then to displays. Look for "Scale for menu and title bars." then drag the slider to whatever size you want.
I have a MacBookPro Retina display. The accepted solution partially worked for me but I was unable to get Java apps to work properly, and I found the OS to become too laggy while using 2x scaling.
Changing resolutions while using Ubuntu's default Nouveau display driver would result in a black screen and force me to restart my computer.
I finally found a solution, and a simple one. But this does not use scaling and this will not take advantage of HiDPI, but at least Ubuntu will be usable.