Super necro posting here but seeing as this is STILL a relevant issue I'm having may as well. Denkplage to clear things up the fix I believe your addressing requires the installation of xorg-driver-video-intel first and then using nano or editor of choice edit the file. Otherwise it just leads to a black screen where this method does not:
sudo eopkg install xorg-driver-video-intel
sudo nano /etc/X11/xorg.conf.d/20-intel.conf
This creates a new file then enter the following:
Identifier "Intel Graphics"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Ctrl+O (save), Enter, Ctrl+X (exit)
I tried this. However this does NOT fix my tearing issue. Now just to update this issue I'm still having issues with tearing on the first graphics mentioned and now my new laptop with the Intel® HD Graphics 620 (Kaby Lake GT2) is having full screen tearing as well. So as a temporary fix I dug further into the issue.
My mini desktop with the intel Iris Plus Graphics 640 (Kaby Lake GT3e) is ALSO having full screen tearing issues hooked to my TV.
Heres what I tried. (Also this was and still is on Solus Budgie)
sudo eopkg install compton
started compton by clicking on the menu icon from the bar and it started.
Did NOT fix full screen tearing issue
sudo eopkg install kwin
I couldn't even begin to try and figure out how to replace it with the existing window manager. I also didn't know at the time the default wm.
Uninstalled mutter. Broke everything. DON'T do this.
Reinstalled mutter. Couldn't figure out how to restart wm to get into the session.
sudo eopkg install compiz
as an autostart script under budgie desktop settings
Now normally I avoid compiz like the plague as I find it a resource hog...but suddenly it just worked...no more fullscreen tearing. Yay!
Except it took my wallpaper and gave me a black background instead. Fix it in compiz-settings-manager you say? I'd love to!
Except it won't start. At all. It gave me two errors in terminal. The first:
It was missing the package "gtk2-engine-murrine"
So I installed it.
sudo eopkg install gtk2-engine-murrine
*** Error in `/usr/bin/python': free(): invalid pointer: 0x00007f12e6aad0d8 ***
At this point I have no idea how to fix that ^^^
I dug around a little more and found that Solus is run with mutter and the budgie-wm package. Replacing either of these things seems to break stuff however. As far as I can tell compiz seems to rely on opengl to an extent. Maybe by having opengl the screen tearing is fixed? All I know is I'm currently running Solus budgie with no wallpaper option but also no fullscreen tearing. I guess you could say I'm tore on the matter.
Anyways I'll post up the bug thanks for the link testmonkey! Also any help from devs would be appreciated