My screen is 166dpi (1920x1080, 13"), I run Ubuntu and have minor problem only with Intellij. They use their own font scaling, and it interferes with button placement on some windows.
I realise I should be able to read the docs, but I have found lots of different suggestions on how to do it, while you have successfully!
And for chromium I set default zoom to 125% in browser settings.
https://github.com/appsforartists/pixel_webdev/blob/master/r...
edit Also, I should add that I did spend the extra money to put a Samsung 840 SSD and an extra 8gb stick of ram in here
It's small, the resolution/screen is great, and has everything I need. I also upgraded the RAM and put in an SSD.
After upgrading to 10gb RAM and SSD, it's a really good computer for developer.