Just a really small post for a really annoying issue.
As you might know no stable releases of the Xorg Intel IGP cards has been released in 3 years and Debian/Ubuntu decided to switch to Xorg's modesetting driver as the default for non-legacy Intel cards (see Timo Aaltonen's post for more details on the subject).
The issue with this driver is that it will tear like there's no tomorrow on Skylake chips in some setups.
Figure 1: Pic taken with a myopic smartphone
A while ago I finished building my Ergodox keyboard. I didn't use a PCB nor a Teensy. Instead, I handwired the key matrix and built an ATMEGA32U4 based controller board (the same one the teensy 2.0 is based on so I can use existing firmwares). I mounted the diodes inside of the key switches to make the build cleaner. It was fun.