How to Calibrate Caret-Cursor's position when unstable Cursor in Debian?

Condition: unstable caret-cursor and its position Other complications: many enter-artifacts, much lost content because sudden selections of contents and overwrites, often ctrl+z does not work etc in *Google Product Forums* so much lost work time; my typing speed in Debian now: 10-30 WPM; normally, 80-95 WPM long-term with Dvorak - configurating *Keyboard > Typing* in Fig. 1 cannot solve the artifacts so there must be something internal going on; possible related to, touchpad/... - keybooard-layout independent - occurs in Qwerty and Dvorak - no firmware errors - dmesg |grep firmware returns no relevant errors/warnings - keyboard-independent - problems occur with an external keyboard too I had to do about two corrections every sentence because of abnormal typing configuration. I think I am not touching the touchpad neither by accident. I think I have much more typing artifacts now than with Ubuntu 16.04. Fig. 1 Options which I change to find optimal configuration but not sufficient and something internal must be going on System characteristics 0. I purged already xserver-xorg-video-intel because many bugs so using modesetting and (2) 1. Backported Linux kernel (4.6) and Skylake CPU support and firmware installed (thread How Smooth is Upgrading Linux kernel in Debian 8.5? ) - apt-get -t jessie-backports install linux-image-amd64 - apt-get -t jessie-backports install firmware-misc-nonfree 2. Installed wifi firmware - apt-get -t jessie-backports install firmware-iwlwifi Proposals 1. Some missing firmware because no firmware errors, severe problem and the setting *Keyboard > Typing* 2. Insufficient Skylake support in Linux kernel 4.6? I will exclude this thing by trying 4.7. - - I think CPU graphic can affect cursor's location, which stability seems to be the main problem here. Hardware: Asus Zenbook UX303UA Debian: 8.5 64 bit Linux kernel: 4.6 backported Keyboard layout: Qwerty, Dvorak, ...